Opinions from P. A. Jell and J. M. Adrain 2002

  • 'Abagnostus is a subjective synonym of Lisogoragnostus'
  • 'Abakania belongs to Corynexochidae'
  • 'Abakanopleura belongs to Solenopleuridae'
  • 'Abharella belongs to Anomocaridae'
  • 'Acadagnostus is a subjective synonym of Peronopsis'
  • 'Acadolenus belongs to Ellipsocephalidae'
  • 'Acanthagnostus is a subjective synonym of Clavagnostus'
  • 'Acanthaloma is a subjective synonym of Leonaspis'
  • 'Acanthalomina belongs to Odontopleuridae'
  • 'Acanthocnemis is a subjective synonym of Sao'
  • 'Acanthogramma is a subjective synonym of Sao'
  • 'Acantholenus is a subjective synonym of Acrocephalites'
  • 'Acanthometopus belongs to Solenopleuridae'
  • 'Acanthomicmacca belongs to Chengkouiidae'
  • 'Acanthoparypha belongs to Cheiruridae'
  • 'Acanthopleurella belongs to Shumardiidae'
  • 'Acanthopyge belongs to Lichidae'
  • 'Acanthopyge (Jasperia) was reranked as Jasperia and belongs to Lichidae'
  • 'Acanthopyge (Mephiarges) was reranked as Mephiarges and belongs to Lichidae'
  • 'Acanthopyge (Mephiarges) bifida is recombined as Jasperia bifida'
  • 'Acastava belongs to Acastidae'
  • 'Acaste belongs to Acastidae'
  • 'Acastella belongs to Acastidae'
  • 'Acastellina belongs to Acastidae'
  • 'Acastina is an objective synonym of Acaste'
  • 'Acastocephala belongs to Acastidae'
  • 'Acastoidea belongs to Trilobita'
  • 'Acastoides belongs to Acastidae'
  • 'Acastopyge belongs to Acastidae'
  • 'Acernaspis belongs to Phacopidae'
  • 'Acerocare belongs to Olenidae'
  • 'Acerocarina belongs to Olenidae'
  • 'Aceroproetus belongs to Proetidae'
  • 'Aceroproetus acer belongs to Aceroproetus' according to Kolobova 1988
  • 'Achatella belongs to Pterygometopidae'
  • 'Acheilops belongs to Catillicephalidae'
  • 'Acheilus is replaced by Peracheilus'
  • 'Achlysopsis belongs to Ptychopariidae'
  • 'Aciculolenus belongs to Olenidae'
  • 'Acidaspidella belongs to Lichakephalidae'
  • 'Acidaspides belongs to Lichakephalidae'
  • 'Acidaspidina belongs to Lichakephalidae'
  • 'Acidaspis belongs to Odontopleuridae'
  • 'Acidiphorus belongs to Bathyuridae'
  • 'Acmarhachis belongs to Agnostidae'
  • 'Acontheus belongs to Corynexochidae'
  • 'Acrocephalaspis belongs to Solenopleuridae'
  • 'Acrocephalites belongs to Acrocephalitidae'
  • 'Acrocephalops belongs to Bolaspididae'
  • 'Acrodirotes belongs to Acrocephalitidae'
  • 'Acrohybus is a subjective synonym of Hungaia'
  • 'Acrolichas is a subjective synonym of Amphilichas'
  • 'Actinolobus is a subjective synonym of Illaenus'
  • 'Actinopeltis belongs to Cheiruridae'
  • 'Aculeodiscus is a subjective synonym of Dawsonia'
  • 'Acutaspis is a subjective synonym of Triangulaspis'
  • 'Acutatagnostus is a subjective synonym of Agnostus'
  • 'Acuticryphops belongs to Phacopidae'
  • 'Adastocephalum belongs to Phacopidae'
  • 'Adelogonus belongs to Damesellidae'
  • 'Aedotes belongs to Leiostegiidae'
  • 'Aeglina is an objective synonym of Cyclopyge'
  • 'Aegrotocatellus belongs to Encrinuridae'
  • 'Aeonia is an objective synonym of Proetus'
  • 'Aethedionide belongs to Dionididae'
  • 'Aethia belongs to Trilobita'
  • 'Afghanocare belongs to Anomocaridae'
  • 'Afrops belongs to Phacopidae'
  • 'Agalatus is a subjective synonym of Inkouia'
  • 'Agaso belongs to Agraulidae'
  • 'Agelagma belongs to Catillicephalidae'
  • 'Agerina belongs to Leiostegiidae'
  • 'Aglagalia is a nomen nudum'
  • 'Agnostardis belongs to Glyptagnostidae'
  • 'Agnostascus is a subjective synonym of Proagnostus'
  • 'Agnostoglossa is a subjective synonym of Ammagnostus'
  • 'Agnostogonus belongs to Agnostina'
  • 'Agnostus belongs to Agnostidae'
  • 'Agnostus calvus belongs to Agnostus' according to Lake 1906
  • 'Agnostus desideratus is recombined as Mallagnostus desideratus'
  • 'Agnostus elkedraensis belongs to Agnostus' according to Eldredge 1902
  • 'Agnostus elkedraensis is recombined as Itagnostus elkedraensis' according to Opik 1979
  • 'Agnostus elkedraensis is recombined as Peronopsis elkedraensis' according to Jell 1997
  • 'Agnostus elkedraensis is recombined as Peronopsis elkedraensis'
  • 'Agnostus perrugatus belongs to Agnostus' according to Barrande 1872
  • 'Agnostus perrugatus is recombined as Corrugatagnostus perrugatus'
  • 'Agnostus pusillus belongs to Agnostus' according to Tullberg 1880
  • 'Agnostus pusillus is recombined as Svenax pusillus' according to Opik 1979
  • 'Agraulidae belongs to Solenopleuracea' according to Geyer and Landing 2001
  • 'Agrauloides is a subjective synonym of Agraulos'
  • 'Agraulopsis is a subjective synonym of Ptychoparia'
  • 'Agraulos belongs to Agraulidae'
  • 'Aguaraya belongs to Trilobita'
  • 'Aiaiaspis belongs to Solenopleuridae'
  • 'Aidarella belongs to Solenopleuridae'
  • 'Ainoa is a subjective synonym of Holia'
  • 'Aistagnostus belongs to Agnostidae'
  • 'Ajacicrepida belongs to Ceratopygidae'
  • 'Ajrikina belongs to Alsataspididae'
  • 'Akbashichia belongs to Redlichiina'
  • 'Akoldinioidia is a subjective synonym of Koldinioidia'
  • 'Aksapyge is a subjective synonym of Promacropyge'
  • 'Aksayaspis belongs to Cheilocephalidae'
  • 'Aksayaspis convexus belongs to Aksayaspis' according to Ergaliev 2001
  • 'Aktugaiella belongs to Remopleurididae'
  • 'Alacephalus belongs to Edelsteinaspididae'
  • 'Alanisia belongs to Estaingiidae'
  • 'Alataurus belongs to Palaeolenidae'
  • 'Albansia belongs to Solenopleuridae'
  • 'Albertella belongs to Zacanthoididae'
  • 'Albertellina belongs to Zacanthoididae'
  • 'Albertelloides belongs to Zacanthoididae'
  • 'Alberticoryphe belongs to Tropidocoryphidae'
  • 'Alborsella belongs to Ptychaspididae'
  • 'Alcaldops is a subjective synonym of Heliopyge'
  • 'Alceste belongs to Styginidae'
  • 'Aldanaspis belongs to Solenopleuridae'
  • 'Aldonaia belongs to Aldonaiidae'
  • 'Aldonaiidae belongs to Ptychopariida'
  • 'Alekcinella belongs to Dokimocephalidae'
  • 'Alemtejoia is a subjective synonym of Delgadella'
  • 'Alimbetaspis is a subjective synonym of Jujuyaspis'
  • 'Allobodochus belongs to Ptychagnostidae'
  • 'Alloleiostegium is a subjective synonym of Leiostegium'
  • 'Allolichas belongs to Lichidae'
  • 'Alokistocare belongs to Alokistocaridae'
  • 'Alokistocarella belongs to Alokistocaridae'
  • 'Alomataspis belongs to Proasaphiscidae'
  • 'Alreboaspis is a subjective synonym of Borealaspis'
  • 'Alsataspis is a subjective synonym of Seleneceme'
  • 'Altaepeltis belongs to Styginidae'
  • 'Altaesajania belongs to Phacopidae'
  • 'Altaiaspis belongs to Eulomidae'
  • 'Altajaharpes is a nomen nudum'
  • 'Altiocculus belongs to Alokistocaridae'
  • 'Altiplanelaspis belongs to Trilobita'
  • 'Altitudella belongs to Ptychopariidae'
  • 'Alwynulus belongs to Encrinuridae'
  • 'Amblycranium belongs to Hystricuridae'
  • 'Ambonolium belongs to Illaenuridae'
  • 'Amecephalina belongs to Alokistocaridae'
  • 'Amecephalites belongs to Ptychopariidae'
  • 'Amecephaloides belongs to Alokistocaridae'
  • 'Amecephalus belongs to Alokistocaridae'
  • 'Amechilus belongs to Trilobita'
  • 'Americare is a subjective synonym of Glyphaspis'
  • 'Ameropiltonia belongs to Proetidae'
  • 'Ameura belongs to Proetidae'
  • 'Amgaspididae belongs to Corynexochida'
  • 'Amgaspis belongs to Amgaspididae'
  • 'Amginia belongs to Anomocaridae'
  • 'Amginoerbia belongs to Dinesidae'
  • 'Amginouyia belongs to Utiidae'
  • 'Amiaspis belongs to Lonchocephalidae'
  • 'Amicus belongs to Cyclopygidae'
  • 'Ammagnostus belongs to Ammagnostidae'
  • 'Amorphella belongs to Aphelaspididae'
  • 'Amphilichas belongs to Lichidae'
  • 'Amphitryon belongs to Remopleurididae'
  • 'Amphotonella is a subjective synonym of Amphoton'
  • 'Ampyxella belongs to Raphiophoridae'
  • 'Ampyxina belongs to Raphiophoridae'
  • 'Ampyxinella belongs to Raphiophoridae'
  • 'Ampyxinops is a subjective synonym of Malongullia'
  • 'Amquia belongs to Llanoaspididae'
  • 'Amurticephalus is a subjective synonym of Parachittidilla'
  • 'Amzasskiella belongs to Eulomidae'
  • 'Anabaraceps belongs to Paradoxididae'
  • 'Anabaraspis is replaced by Anabaraspis'
  • 'Anabaraspis belongs to Paradoxididae'
  • 'Anacaenaspis belongs to Odontopleuridae'
  • 'Anacheirurus belongs to Pilekiidae'
  • 'Anadoxides is a subjective synonym of Metadoxides'
  • 'Analocaspis is a subjective synonym of Rorringtonia'
  • 'Analocaspis ursina is recombined as Rorringtonia ursina'
  • 'Ananaspis belongs to Phacopidae'
  • 'Anapliomera belongs to Pliomeridae'
  • 'Anasobella belongs to Cheiruridae'
  • 'Anataphrus belongs to Asaphidae'
  • 'Anchiopella belongs to Calmoniidae'
  • 'Anchiopsis belongs to Dalmanitidae'
  • 'Ancyginaspis belongs to Cheiruridae'
  • 'Ancyropyge belongs to Styginidae'
  • 'Ancyropyge is a subjective synonym of Ancyropyge'
  • 'Anderssonella belongs to Saukiidae'
  • 'Andesaspis is a subjective synonym of Leptoplastides'
  • 'Andesaspis (Parabolinopsis) sinensis is recombined as Leptoplastides sinensis'
  • 'Andinacaste belongs to Calmoniidae'
  • 'Andrarina belongs to Andrarinidae'
  • 'Andrarinidae belongs to Asaphida'
  • 'Andreaspis belongs to Dalmanitidae'
  • 'Anebolithus belongs to Trinucleidae'
  • 'Anechocephalus belongs to Pterocephaliidae'
  • 'Anemocephalops belongs to Marjumiidae'
  • 'Anemocephalus belongs to Dokimocephalidae'
  • 'Aneucanthus is an objective synonym of Acontheus'
  • 'Aneuacanthus is replaced by Aneuacanthus' according to Barrande 1856
  • 'Angelina belongs to Olenidae'
  • 'Angustaeva is a subjective synonym of Triangulaspis'
  • 'Anisopyge belongs to Proetidae'
  • 'Ankoura belongs to Kingstoniidae'
  • 'Annamitella belongs to Leiostegiidae'
  • 'Annamitia belongs to Alokistocaridae'
  • 'Anomalocephalus is a subjective synonym of Ehmaniella'
  • 'Anomocaraspis is a subjective synonym of Hundwarella'
  • 'Anomocare belongs to Anomocaridae'
  • 'Anomocarella belongs to Anomocarellidae'
  • 'Anomocarellidae belongs to Asaphida'
  • 'Anomocarina belongs to Anomocaridae'
  • 'Anomocarioides belongs to Anomocaridae'
  • 'Anomocariopsis belongs to Anomocaridae'
  • 'Anopocare is a subjective synonym of Peltura'
  • 'Anopocodia belongs to Diceratocephalidae'
  • 'Anoria belongs to Dolichometopidae'
  • 'Anorina is an objective synonym of Eoasaphus'
  • 'Antagmidae belongs to Ptychopariida'
  • 'Antagmopleura belongs to Utiidae'
  • 'Antagmus belongs to Antagmidae'
  • 'Antatlaeva is a nomen nudum'
  • 'Antatlasia belongs to Ellipsocephalidae'
  • 'Anthes is an objective synonym of Peltura'
  • 'Anuloides belongs to Dokimocephalidae'
  • 'Aocaspis belongs to Nileidae'
  • 'Aojia is a subjective synonym of Lisania'
  • 'Aotagnostus is a subjective synonym of Ptychagnostus'
  • 'Aotagnostus culminosus is recombined as Ptychagnostus culminosus'
  • 'Apachia belongs to Dokimocephalidae'
  • 'Apachilites is a subjective synonym of Apachia'
  • 'Apatokephalina belongs to Remopleurididae'
  • 'Apatokephaloides belongs to Remopleurididae'
  • 'Apatokephalops belongs to Remopleurididae'
  • 'Apatokephalus belongs to Remopleurididae'
  • 'Apatolichas belongs to Lichidae'
  • 'Apedopyanus is a subjective synonym of Hysteropleura'
  • 'Aphelaspididae belongs to Asaphida'
  • 'Aphelaspis belongs to Aphelaspididae'
  • 'Apheloides belongs to Aphelaspididae'
  • 'Aphelotoxon belongs to Phylacteridae'
  • 'Apianurus belongs to Odontopleuridae'
  • 'Aplexura belongs to Liostracinidae'
  • 'Aplotaspis is a subjective synonym of Charchaqia'
  • 'Apocalymene belongs to Calymenidae'
  • 'Apolichas is a subjective synonym of Lichas'
  • 'Apomodocia belongs to Parabolinoididae'
  • 'Aponileus is a subjective synonym of Psephosthenaspis'
  • 'Apoplanias belongs to Olenidae'
  • 'Aposolenopleura is a subjective synonym of Ptychopleurites'
  • 'Appendicysta belongs to Archegoninae' according to Hahn and Brauckmann 1989
  • 'Appendicysta belongs to Proetidae'
  • 'Aprathia belongs to Archegoninae' according to Owens and Tilsley 1995
  • 'Aprathia belongs to Proetidae'
  • 'Araiocaris belongs to Asaphidae'
  • 'Araiopleura belongs to Alsataspididae'
  • 'Arapahoia belongs to Plethopeltidae'
  • 'Archaeagnostus belongs to Peronopsidae'
  • 'Archaeops is a subjective synonym of Eoredlichia'
  • 'Archaeuloma belongs to Eulomidae'
  • 'Archegonus belongs to Proetidae'
  • 'Archegonus (Angustibole) belongs to Archegonus'
  • 'Archegonus (Angustibole) winterbergensis belongs to Archegonus (Angustibole)' according to Hahn 1965
  • 'Archegonus (Archegonus) belongs to Archegonus' according to Burmeister 1843
  • 'Archegonus (Crassibole) was reranked as Crassibole and belongs to Proetidae'
  • 'Archegonus (Merebolina) was reranked as Merebolina and belongs to Proetidae'
  • 'Archegonus (Merebolina) belongs to Archegonus' according to Grandl 1980
  • 'Archegonus (Merebolina) merensis belongs to Archegonus (Merebolina)' according to Gandl 1980
  • 'Arcifimbria belongs to Pagodiidae'
  • 'Arcticalymene belongs to Calymenidae'
  • 'Arcticeraurinella belongs to Cheiruridae'
  • 'Arcticormistonia is a subjective synonym of Pseudodechenella'
  • 'Arcticormistonia edgecombei is recombined as Pseudodechenella edgecombei'
  • 'Arctinuroides is a subjective synonym of Pseudotupolichas'
  • 'Arctinurus belongs to Lichidae'
  • 'Arctipeltis belongs to Styginidae'
  • 'Arcuolimbus belongs to Llanoaspididae'
  • 'Arduennella belongs to Homalonotidae'
  • 'Areia belongs to Cheiruridae'
  • 'Areiaspis belongs to Cheiruridae'
  • 'Arellanella belongs to Alokistocaridae'
  • 'Arethusina is an objective synonym of Aulacopleura'
  • 'Arethusina is replaced by Arethusina' according to Barrande 1852
  • 'Argentinops is a subjective synonym of Hungioides'
  • 'Argentopyge belongs to Dalmanitidae'
  • 'Argunaspis belongs to Ellipsocephalidae'
  • 'Ariaspis belongs to Damesellidae'
  • 'Arionides is replaced by Arionides' according to Barrande 1847
  • 'Arionellus is replaced by Arionellus' according to Barrande 1852
  • 'Arion is an objective synonym of Agraulos'
  • 'Arionellus pustulatus is recombined as Glaphurus pustulatus'
  • 'Aristoharpes is a subjective synonym of Selenoharpes'
  • 'Aristokainella is a subjective synonym of Apatokephalops'
  • 'Armagnostus belongs to Agnostina'
  • 'Armonia is a subjective synonym of Modocia'
  • 'Armorigreenops belongs to Acastidae'
  • 'Arraphus belongs to Harpetidae'
  • 'Arthricocephalus belongs to Oryctocephalidae'
  • 'Arthricocephalites is a subjective synonym of Arthricocephalus'
  • 'Arthricocephalus (Euarthricocephalus) belongs to Arthricocephalus' according to Ju 1983
  • 'Arthricocephalus (Euarthricocephalus) was reranked as Euarthricocephalus and belongs to Oryctocephalidae'
  • 'Artokephalus belongs to Remopleurididae'
  • 'Asaphellina belongs to Taihungshaniidae'
  • 'Asaphelloides is a subjective synonym of Asaphellus'
  • 'Asaphellus belongs to Asaphidae'
  • 'Asaphiscus belongs to Asaphiscidae'
  • 'Asaphiscus (Blainia) was reranked as Blainia and belongs to Asaphiscidae'
  • 'Asaphoon is a subjective synonym of Asaphellus'
  • 'Asaphopsis belongs to Taihungshaniidae'
  • 'Asaphopsis intermedia is recombined as Hungioides intermedia'
  • 'Asaphopsoides belongs to Hungaiidae'
  • 'Asaphus belongs to Asaphidae'
  • 'Asaphus (Ampyx) was reranked as Ampyx and belongs to Raphiophoridae'
  • 'Asaphus (Isotelus) gigas is recombined as Isotelus gigas'
  • 'Platypeltis is replaced by Platypeltoides'
  • 'Asaphus (Platypeltis) croftii is recombined as Platypeltoides croftii'
  • 'Ascetopeltis belongs to Proetidae'
  • 'Ascionepea belongs to Nepeidae'
  • 'Asiatella belongs to Ellipsocephalidae'
  • 'Asilluchus belongs to Olenidae'
  • 'Asioptychaspis is a subjective synonym of Ptychaspis'
  • 'Asperocare belongs to Dolichometopidae'
  • 'Aspidaeglina belongs to Cyclopygidae'
  • 'Asteraspis is an objective synonym of Deiracephalus'
  • 'Asteromajia is a subjective synonym of Temnoura'
  • 'Asteropyge belongs to Acastidae'
  • 'Asthenaspis belongs to Redlichinidae'
  • 'Asthenopsis belongs to Ptychopariidae'
  • 'Astycoryphe belongs to Tropidocoryphidae'
  • 'Ataktaspis is a subjective synonym of Komaspidella'
  • 'Atdabanella belongs to Dorypygidae'
  • 'Athabaskia belongs to Dolichometopidae'
  • 'Athabaskiella belongs to Dolichometopidae'
  • 'Atopasaphus belongs to Asaphidae'
  • 'Atopidae belongs to Ptychopariida'
  • 'Atops belongs to Atopidae'
  • 'Atractocybeloides belongs to Encrinuridae'
  • 'Atractocybeloides berneri belongs to Atractocybeloides' according to Krueger 1991
  • 'Atractopyge belongs to Encrinuridae'
  • 'Atratebia belongs to Remopleuridae'
  • 'Aulacodigma belongs to Diceratocephalidae'
  • 'Aulacodiscus is replaced by Opsidiscus' according to Westergard 1950
  • 'Aulacoparia belongs to Asaphidae'
  • 'Aulacoparia (Aulacoparina) was reranked as Aulacoparina and belongs to Asaphidae'
  • 'Aulacopleura belongs to Aulacopleuridae'
  • 'Paraaulacopleura is a subjective synonym of Aulacopleura'
  • 'Aulacopleurella is a subjective synonym of Otarion'
  • 'Auritama belongs to Auritamidae'
  • 'Auritamidae belongs to Asaphida'
  • 'Austinvillia belongs to Ptychopariidae'
  • 'Australaspis belongs to Saukiandidae'
  • 'Australoacaste belongs to Calmoniidae'
  • 'Australoharpes is a subjective synonym of Dubhglasina'
  • 'Australokaskia belongs to Proetidae'
  • 'Australops belongs to Calmoniidae'
  • 'Australopyge belongs to Asaphidae'
  • 'Australoscutellum belongs to Styginidae'
  • 'Austosinia is a subjective synonym of Changqingia'
  • 'Austrosinia is a subjective synonym of Changqingia' according to Zan 1992
  • 'Autolichas is a subjective synonym of Lichas'
  • 'Autoloxolichas belongs to Lichidae'
  • 'Avalanchurus belongs to Encrinuridae'
  • 'Avalonia belongs to Atopidae'
  • 'Avascutellum belongs to Styginidae'
  • 'Avonaspis is a subjective synonym of Welleraspis'
  • 'Avonina belongs to Avoninidae'
  • 'Axagnostus is a subjective synonym of Acadagnostus'
  • 'Babakovia is a subjective synonym of Kooteniella'
  • 'Babinops belongs to Phacopidae'
  • 'Badainjaranaspis belongs to Papyriaspididae'
  • 'Badulesia belongs to Solenopleuridae'
  • 'Baikonuraspis belongs to Olenidae'
  • 'Bailiaspis belongs to Conocoryphidae'
  • 'Bailielloides inexpectans belongs to Bailielloides'
  • 'Bainella is a subjective synonym of Anchiopella'
  • 'Bajangoliaspis belongs to Palaeolenidae'
  • 'Balangia belongs to Oryctocephalidae'
  • 'Balderia belongs to Menomoniidae'
  • 'Balizoma belongs to Encrinuridae'
  • 'Balnibarbi belongs to Olenidae'
  • 'Baltagnostus belongs to Diplagnostidae'
  • 'Baltoparadoxides belongs to Paradoxididae'
  • 'Bandalaspis belongs to Eurekiidae'
  • 'Baniaspis belongs to Acastidae'
  • 'Baojingia is a subjective synonym of Eoshengia'
  • 'Bapingaspis belongs to Proetidae'
  • 'Bapingaspis bapingensis belongs to Bapingaspis' according to Yuan 1988
  • 'Barklyella belongs to Oryctocephalidae'
  • 'Barrandagnostus is a subjective synonym of Glyptagnostus'
  • 'Barrandia belongs to Nileidae'
  • 'Bartoninus is a subjective synonym of Ceraurinella'
  • 'Basanellus belongs to Dolichometopidae'
  • 'Basidechenella belongs to Proetidae'
  • 'Basilicoides is a subjective synonym of Thysanopyge'
  • 'Basilicus belongs to Asaphidae'
  • 'Basiliella is a subjective synonym of Basilicus'
  • 'Basocephalus belongs to Dorypygidae'
  • 'Batchatiella is a nomen nudum'
  • 'Batenioides belongs to Agraulidae'
  • 'Bathycheilidae belongs to Phacopida'
  • 'Bathycheilus belongs to Bathycheilidae'
  • 'Bathyholcus belongs to Ptychopariidae'
  • 'Bathynotellus belongs to Chengkouaspidae'
  • 'Bathynotus belongs to Chengkouaspidae'
  • 'Bathyocos belongs to Ptychopariidae'
  • 'Bathyurellus belongs to Bathyuridae'
  • 'Bathyurina is a subjective synonym of Jeffersonia'
  • 'Bathyuriscellus belongs to Jakutidae'
  • 'Bathyuriscidella belongs to Dolichometopidae'
  • 'Bathyuriscops is a subjective synonym of Annamitella'
  • 'Bathyuriscopsis belongs to Jakutidae'
  • 'Bathyuriscus belongs to Dolichometopidae'
  • 'Bathyuriscus (Poliella) was reranked as Poliella and belongs to Dolichometopidae'
  • 'Bathyurus belongs to Bathyuridae'
  • 'Bathyurus (Raymondites) was reranked as Raymondites and belongs to Bathyuridae'
  • 'Batocara belongs to Encrinuridae'
  • 'Battus is an objective synonym of Agnostus'
  • 'Batyraspis is a subjective synonym of Taoyuania'
  • 'Bavarilla belongs to Bavarillidae'
  • 'Bavarillidae belongs to Phacopida'
  • 'Bayfieldia belongs to Eurekiidae'
  • 'Beigongia belongs to Pterocephaliidae'
  • 'Beishanella belongs to Centropleuridae'
  • 'Beldirella belongs to Alokistocaridae'
  • 'Belenopyge is a subjective synonym of Lobopyge'
  • 'Belgibole belongs to Proetidae'
  • 'Bellacartwrightia belongs to Acastidae'
  • 'Bellaspidella belongs to Dokimocephalidae'
  • 'Bellaspis belongs to Dokimocephalidae'
  • 'Bellefontia belongs to Asaphidae'
  • 'Belliceps belongs to Chengkouaspididae'
  • 'Belovia belongs to Lichakephalidae'
  • 'Beltella is a subjective synonym of Leptoplastides'
  • 'Bemaspis is a subjective synonym of Taenicephalus'
  • 'Benedettia belongs to Pliomeridae'
  • 'Benesovella belongs to Proetidae'
  • 'Benxiaspis is a subjective synonym of Kunmingaspis'
  • 'Beothuckia belongs to Dokimocephalidae'
  • 'Berabichia is a subjective synonym of Ptychoparopsis'
  • 'Bergamia belongs to Trinucleidae'
  • 'Bergerolimbus is a nomen nudum'
  • 'Bergeronia is an objective synonym of Protolenus'
  • 'Bergeroniaspis belongs to Ellipsocephalidae'
  • 'Bergeroniellus belongs to Ellipsocephalidae'
  • 'Bergeronites belongs to Damesellidae'
  • 'Berkeia belongs to Dikelocephalidae'
  • 'Berkutaspis belongs to Nileidae'
  • 'Bernia is a subjective synonym of Parabolinoides'
  • 'Bernicella is a subjective synonym of Oligometopus'
  • 'Bessazoon belongs to Dalmanitidae'
  • 'Bestjubella belongs to Lichakephalidae'
  • 'Bettonia is replaced by Bettonolithus' according to Morris 1988
  • 'Bettonolithus belongs to Trinucleidae'
  • 'Bevanopsis belongs to Encrinuridae'
  • 'Biaverta belongs to Menomoniidae'
  • 'Bicaspis is a subjective synonym of Protypus'
  • 'Bicella belongs to Antagmidae'
  • 'Bicornipyge is a subjective synonym of Dichelepyge'
  • 'Bicyclopyge is a subjective synonym of Pricyclopyge'
  • 'Bidjinella belongs to Chengkouiidae'
  • 'Bienella belongs to Pagodiidae'
  • 'Bienvillia belongs to Olenidae'
  • 'Bifodina belongs to Trilobita'
  • 'Bigotina belongs to Bigotinidae'
  • 'Bigotinella belongs to Bigotinidae'
  • 'Bigotinidae belongs to Ptychopariida'
  • 'Bigotinops belongs to Bigotinidae'
  • 'Bigranulella belongs to Solenopleuridae'
  • 'Billingsaspis belongs to Ptychopariidae'
  • 'Binodaspis belongs to Ptychopariidae'
  • 'Biolgina is a subjective synonym of Peltabellia'
  • 'Biolgina sibirica is recombined as Peltabellia sibirica' according to Zhou and Fortey 1986
  • 'Biragnostus is a subjective synonym of Aspidagnostus'
  • 'Birmanites belongs to Asaphidae'
  • 'Bitumulina belongs to Proetidae'
  • 'Blackwelderia belongs to Damesellidae'
  • 'Blackwelderioides belongs to Damesellidae'
  • 'Blainiopsis belongs to Asaphiscidae'
  • 'Blairella belongs to Ptychopariidae'
  • 'Blandiaspis belongs to Tsinaniidae'
  • 'Blandicephalus belongs to Dikelocephalidae'
  • 'Blanodalmanites belongs to Dalmanitidae'
  • 'Blayacina belongs to Ellipsocephalidae'
  • 'Blosyropsis belongs to Remopleurididae'
  • 'Blountia belongs to Kingstoniidae'
  • 'Blountiella belongs to Asaphiscidae'
  • 'Blountina belongs to Asaphiscidae'
  • 'Blystagnostus belongs to Agnostina'
  • 'Bodenbenderia is a subjective synonym of Brackebuschia'
  • 'Boeckaspis is a subjective synonym of Sphaerophthalmella'
  • 'Bohemaspis is a subjective synonym of Bergamia'
  • 'Bohemaspis is a subjective synonym of Bergamia' according to Shaw 1995
  • 'Bohemilla belongs to Bohemillidae'
  • 'Bohemoharpes belongs to Harpetidae'
  • 'Bohemolichas is a subjective synonym of Uralichas'
  • 'Bohemopyge belongs to Asaphidae'
  • 'Bojocoryphe belongs to Tropidocoryphidae'
  • 'Bojokoralaspis is a subjective synonym of Eoleonaspis'
  • 'Bojoscutellum belongs to Styginidae'
  • 'Bolaspidella belongs to Menomoniidae'
  • 'Bolaspidellus belongs to Lonchocephalidae'
  • 'Bolaspidina belongs to Ptychopariidae'
  • 'Bolaspis belongs to Bolaspididae'
  • 'Bolbocephalus belongs to Bathyuridae'
  • 'Bolbochasmops belongs to Pterygometopidae'
  • 'Bolivianaspis is a subjective synonym of Tarijactinoides'
  • 'Bolivianaspis is a subjective synonym of Tarijactinoides' according to Eldredge and Branisia 1980
  • 'Bolivicrania belongs to Proetidae'
  • 'Boliviproetus branisai belongs to Boliviproetus' according to Eldredge and Ormiston 1979
  • 'Boliviproetus branisai belongs to Boliviproetus' according to Eldredge and Ormiston 1979
  • 'Bollandia belongs to Proetidae'
  • 'Bollandia (Capricornia) was reranked as Capricornia and belongs to Proetidae'
  • 'Bollandia (Capricornia) queenslandica is recombined as Capricornia queenslandica'
  • 'Bondarevites belongs to Olenidae'
  • 'Bondonella belongs to Neltneriidae'
  • 'Bonnaria belongs to Dorypygidae'
  • 'Bonnaspis belongs to Corynexochidae'
  • 'Bonneterrina belongs to Cedariidae'
  • 'Bonniella belongs to Dorypygidae'
  • 'Bonniopsis belongs to Dorypygidae'
  • 'Borealarges belongs to Lichidae'
  • 'Borealaspis belongs to Cheiruridae'
  • 'Borealia belongs to Proetidae'
  • 'Borealia laevis belongs to Borealia' according to Maksimova 1977
  • 'Boreoscutellum belongs to Styginidae'
  • 'Borkopleura belongs to Odontopleuridae'
  • 'Bornemannaspis belongs to Gigantopygidae'
  • 'Bornemannia is a subjective synonym of Poliella'
  • 'Bornholmaspis belongs to Cheiruridae'
  • 'Borthaspidella belongs to Nileidae'
  • 'Borthaspis is an objective synonym of Psilocephalinella'
  • 'Boschchekulia belongs to Ceratopygidae'
  • 'Botomella belongs to Dinesidae'
  • 'Botrioides belongs to Trinucleidae'
  • 'Bouleia belongs to Calmoniidae'
  • 'Bounyongia is a subjective synonym of Ceratocephala'
  • 'Bowmania belongs to Harpetidae'
  • 'Brachyampyx is an objective synonym of Ampyx'
  • 'Brachyaspidion belongs to Kingstoniidae'
  • 'Brachyaspis belongs to Asaphidae'
  • 'Brachyhipposiderus belongs to Harpetidae'
  • 'Brachymetopina is an objective synonym of Brachymetopus'
  • 'Brachymetopus belongs to Brachymetopidae'
  • 'Coignouina is a subjective synonym of Namuropyge'
  • 'Brachypleura is a subjective synonym of Amphitryon'
  • 'Brackebuschia belongs to Leiostegiidae'
  • 'Bradocryphaeus belongs to Acastidae'
  • 'Bradyfallotaspis belongs to Archaeaspididae'
  • 'Braintreella belongs to Solenopleuridae'
  • 'Brandysops is a subjective synonym of Bergamia'
  • 'Branisaspis belongs to Asaphidae'
  • 'Branisella is a subjective synonym of Maurotarion'
  • 'Brassicicephalus is a subjective synonym of Exigua'
  • 'Breizhops belongs to Acastidae'
  • 'Breviagnostus is a subjective synonym of Hypagnostus'
  • 'Brevidiscus is a subjective synonym of Calodiscus'
  • 'Breviphillipsia belongs to Proetidae'
  • 'Breviscutellum belongs to Styginidae'
  • 'Brevitermierella belongs to Ellipsocephalidae'
  • 'Brianurus belongs to Encrinuridae'
  • 'Bridgeia belongs to Menomoniidae'
  • 'Briscoia belongs to Dikelocephalidae'
  • 'Bristolia belongs to Olenellidae'
  • 'Broeggerolithus belongs to Trinucleidae'
  • 'Bromella belongs to Pterocephaliidae'
  • 'Brongniartella belongs to Homalonotidae'
  • 'Bronteopsis belongs to Styginidae'
  • 'Brontes is replaced by Bronteus' according to Goldfuss 1843
  • 'Brontes is replaced by Goldius' according to deKoninck 1841
  • 'Bronteus is an objective synonym of Goldius'
  • 'Bronteus (Thysanopeltis) aculeatus belongs to Bronteus (Thysanopeltis)' according to Weber 1945
  • 'Bronteus (Thysanopeltis) aculeatus is recombined as Weberopeltis aculeatus' according to Maksimova 1959
  • 'Bronteus ekwanaspis is recombined as Ekwanoscutellum ekwanaspis' according to Pribyl and Vanek 1971
  • 'Bronteus ekwanaspis is recombined as Ekwanoscutellum ekwanaspis'
  • 'Bronteus richteri is recombined as Mulciberaspis richteri'
  • 'Bronteus romanovskii is recombined as Eokosovopeltis romanovskii'
  • 'Brunswickia belongs to Ptychopariidae'
  • 'Brutaspis belongs to Acrocephalitidae'
  • 'Bruxaspis is a subjective synonym of Anacaenaspis'
  • 'Bubupeltina belongs to Styginidae'
  • 'Buchiproetus belongs to Tropidocoryphidae'
  • 'Bucksella is a subjective synonym of Lonchocephalus'
  • 'Buenaspis belongs to Nektaspida'
  • 'Bufoceraurus belongs to Cheiruridae'
  • 'Buitella belongs to Conokephalinidae'
  • 'Bulbaspis belongs to Raphiophoridae'
  • 'Bullicephalus is a subjective synonym of Eophacops'
  • 'Bumastides belongs to Nileidae'
  • 'Bumastus belongs to Styginidae'
  • 'Bumastus (Bumastoides) was reranked as Bumastoides and belongs to Illaenidae'
  • 'Burmeisterella belongs to Homalonotidae'
  • 'Burmeisteria belongs to Homalonotidae'
  • 'Burminresia belongs to Asaphidae'
  • 'Burnetia is replaced by Burnetiella'
  • 'Burnetiella belongs to Dokimocephalidae'
  • 'Burtonops belongs to Phacopidae'
  • 'Buttsia belongs to Catillicephalidae'
  • 'Buttsina is a subjective synonym of Komaspidella'
  • 'Bynumia belongs to Kingstoniidae'
  • 'Bynumiella is a subjective synonym of Clelandia'
  • 'Bynumina belongs to Kingstoniidae'
  • 'Bythicheilus belongs to Alokistocaridae'
  • 'Caborcella belongs to Ptychopariidae'
  • 'Cainatops belongs to Conocoryphidae'
  • 'Calagnostus is a subjective synonym of Pseudorhaptagnostus'
  • 'Calculites is a subjective synonym of Theodenisia'
  • 'Calipernurus belongs to Odontopleuridae'
  • 'Callaspis belongs to Anomocaridae'
  • 'Callavalonia is an objective synonym of Cephalacanthus'
  • 'Callavia belongs to Holmiidae'
  • 'Calliops belongs to Pterygometopidae'
  • 'Calmonia belongs to Calmoniidae'
  • 'Calmoniidae belongs to Phacopida'
  • 'Calocephalites belongs to Dokimocephalidae'
  • 'Calvinella belongs to Saukiidae'
  • 'Calvipelta belongs to Kingstoniidae'
  • 'Calybole belongs to Proetidae'
  • 'Calymene macrophtalma is recombined as Eodalmanitina macrophthalma'
  • 'Calymene mammillata is recombined as Thelecalymene mammillata' according to Whittington 1971
  • 'Calymene pulchra is recombined as Prionocheilus pulchra'
  • 'Calymenella belongs to Calymenidae'
  • 'Calymenesun [misspelled as Calymenesum] belongs to Calymenidae'
  • 'Calymenidius belongs to Lonchocephalidae'
  • 'Calymenopsis is a subjective synonym of Euloma'
  • 'Calyptaulax belongs to Pterygometopidae'
  • 'Camaraspis belongs to Pterocephaliidae'
  • 'Camaraspoides is a subjective synonym of Camaraspis' according to Grant 1965
  • 'Camaraspoides is a subjective synonym of Camaraspis'
  • 'Cambroinyoella belongs to Nevadiidae'
  • 'Cambropallas belongs to Holmiidae'
  • 'Cambrunicornia belongs to Ellipsocephalidae'
  • 'Camsellia belongs to Proetidae'
  • 'Canningella belongs to Pliomeridae'
  • 'Canotagnostus is a subjective synonym of Ptychagnostus'
  • 'Caphyra is a subjective synonym of Amphytrion'
  • 'Carausia is a subjective synonym of Holocephalina'
  • 'Carbonocoryphe belongs to Proetidae'
  • 'Carbonoproetus belongs to Proetidae'
  • 'Carinamala belongs to Cedariidae'
  • 'Carinobasiliella is a subjective synonym of Basilicus'
  • 'Carinocranium belongs to Raphiophoridae'
  • 'Carinopyge belongs to Pterygometopidae'
  • 'Carmon belongs to Trilobita'
  • 'Carnicia is a subjective synonym of Chuanoproetus'
  • 'Carolinites belongs to Telephinidae'
  • 'Carolinites bulbosus is corrected as Carolinites bulbosa and belongs to Carolinites'
  • 'Carrickia is a subjective synonym of Phorocephala'
  • 'Catadoxides belongs to Ellipsocephalidae'
  • 'Catasolenopleura belongs to Solenopleuridae'
  • 'Cathayanella belongs to Ptychopariidae'
  • 'Catillicephala belongs to Catillicephalidae'
  • 'Catuniella belongs to Conokephalinidae'
  • 'Caulaspis belongs to Lonchocephalidae'
  • 'Caznaia belongs to Saukiidae'
  • 'Cedaraspis belongs to Norwoodiidae'
  • 'Cedarellus is a subjective synonym of Maladioidella'
  • 'Cedaria belongs to Cedariidae'
  • 'Cedariidae belongs to Ptychopariida'
  • 'Cedarina belongs to Cedariidae'
  • 'Cekovia belongs to Styginidae'
  • 'Celmus belongs to Dimeropygidae'
  • 'Celtencrinurus belongs to Encrinuridae'
  • 'Centauropyge belongs to Acastidae'
  • 'Centonella belongs to Dolichometopidae'
  • 'Centriproetus belongs to Tropidocoryphidae'
  • 'Cephalacanthus belongs to Cephalacanthidae'
  • 'Cephalacanthus is a subjective synonym of Callavia'
  • 'Ceratagnostus is a subjective synonym of Doryagnostus'
  • 'Ceratocara belongs to Odontopleuridae'
  • 'Ceratocephala belongs to Odontopleuridae'
  • 'Ceratocephala (Ceratocephalina) was reranked as Ceratocephalina and belongs to Odontopleuridae'
  • 'Ceratolithus is a subjective synonym of Ningkianolithus'
  • 'Ceratonurus belongs to Odontopleuridae'
  • 'Ceratopeltis belongs to Bathyuridae'
  • 'Ceratoproetus belongs to Proetidae'
  • 'Ceratoproetus guangnanensis belongs to Ceratoproetus' according to Luo and Jiang 1985
  • 'Ceratopyge belongs to Ceratopygidae'
  • 'Ceraurinella belongs to Cheiruridae'
  • 'Ceraurinium belongs to Cheiruridae'
  • 'Ceraurinus belongs to Cheiruridae'
  • 'Cerauroides is a subjective synonym of Crotalocephalus'
  • 'Cerauromeros belongs to Cheiruridae'
  • 'Cerauropeltis belongs to Cheiruridae'
  • 'Ceraurus belongs to Cheiruridae'
  • 'Eoceraurus is a subjective synonym of Ceraurus'
  • 'Ceraurus bispinosus belongs to Ceraurus' according to Raymond and Barton 1913
  • 'Ceraurus bispinosus belongs to Ceraurus'
  • 'Cermataspis belongs to Acrocephalitidae'
  • 'Cermatops belongs to Ceratopygidae'
  • 'Cernuolimbus belongs to Pterocephaliidae'
  • 'Ceronocare belongs to Kaolishaniidae'
  • 'Chacomurus belongs to Cheiruridae'
  • 'Chakasskia belongs to Dinesidae'
  • 'Chakasskinella belongs to Dinesidae'
  • 'Champlainia belongs to Ptychopariidae'
  • 'Chancia belongs to Alokistocaridae'
  • 'Chanciaopsis belongs to Alokistocaridae'
  • 'Changaspis is a subjective synonym of Lancastria'
  • 'Changia belongs to Ptychaspididae'
  • 'Changshaniidae belongs to Ptychopariida'
  • 'Changshanocephalus belongs to Changshaniidae'
  • 'Charchaquia is a misspelling of Charchaqia'
  • 'Charchaqia belongs to Ceratopygidae'
  • 'Chariocephalus belongs to Elviniidae'
  • 'Charybdaspis is a subjective synonym of Radiaspis'
  • 'Chasmops belongs to Pterygometopidae'
  • 'Chatiania belongs to Corynexochidae'
  • 'Chatiania (Eochatiania) was reranked as Eochatiania and belongs to Corynexochidae'
  • 'Chatiania (Eochatiania) laevigata is recombined as Eochatiania laevigata'
  • 'Chatkalagnostus belongs to Metagnostidae'
  • 'Chattiaspis belongs to Dalmanitidae'
  • 'Chauffouraspis belongs to Proetidae'
  • 'Chauffouraspis andegavensis belongs to Chauffouraspis' according to Pillet 1973
  • 'Chaunoproetus is corrected as Chuanoproetus and belongs to Proetidae'
  • 'Cheilocephalidae belongs to Corynexochida'
  • 'Cheilocephalus belongs to Cheilocephalidae'
  • 'Suturikephalion is a subjective synonym of Cheiropyge'
  • 'Cheiruroides belongs to Oryctocephalidae'
  • 'Cheirurus belongs to Cheiruridae'
  • 'Cheirurus (Pseudosphaerexochus) was reranked as Pseudosphaerexochus and belongs to Cheiruridae'
  • 'Cheirurus (Sphaerocoryphe) hubneri belongs to Cheirurus (Sphaerocoryphe)' according to Schmidt 1881
  • 'Cheirurus (Sphaerocoryphe) hubneri is recombined as Sphaerocoryphe hubneri' according to Schmidt 1907
  • 'Cheirurus bifurcatus is recombined as Ratinkaspis bifurcatus' according to Pribyl and Vanek 1977
  • 'Cheirurus bifurcatus belongs to Cheirurus' according to Barrande 1852
  • 'Chelidonocephalus belongs to Proasaphiscidae'
  • 'Chenaspis is a subjective synonym of Rorringtonia'
  • 'Chengjiangaspis belongs to Redlichiidae'
  • 'Chengkouia is a subjective synonym of Acanthomicmacca'
  • 'Chengkouia cylindrica belongs to Chengkouia' according to Qian and Yao 1974
  • 'Chengkouiidae belongs to Corynexochida'
  • 'Chiarumanipyge belongs to Calmoniidae'
  • 'Chiawangella belongs to Damesellidae'
  • 'Chienaspis is a subjective synonym of Lancastria'
  • 'Chilometopus belongs to Dolichometopidae'
  • 'Chilonorria belongs to Dolichometopidae'
  • 'Chimaerastella belongs to Acastidae'
  • 'Chiozoon belongs to Cheiruridae'
  • 'Diandongaspidella is a subjective synonym of Chittidilla'
  • 'Diandongaspis is replaced by Diandongaspidella'
  • 'Chittidilla (Diandongaspis) diandongensis is recombined as Diandongaspidella diandongensis'
  • 'Chlupacula belongs to Proetidae'
  • 'Chlustinia [misspelled as Clustinia] belongs to Odontopleurida' according to Sepkoski 2002
  • 'Chlustinia belongs to Odontopleuridae'
  • 'Cholopilus belongs to Leiostegiidae'
  • 'Chomatopyge belongs to Toernquistiidae'
  • 'Chondragraulina belongs to Utiidae'
  • 'Chondragraulos belongs to Utiidae'
  • 'Chondragraulos [misspelled as Chondagraulos] belongs to Corynexochida' according to Sepkoski 2002
  • 'Chondranomocare belongs to Anomocaridae'
  • 'Chondrinouyina belongs to Namanoiidae'
  • 'Chondroparia belongs to Agraulidae'
  • 'Choneilobarges is a subjective synonym of Hemiarges'
  • 'Chosenia belongs to Leiostegiidae'
  • 'Chotecops belongs to Phacopidae'
  • 'Chuangia is a subjective synonym of Schantungia'
  • 'Chuangiopsis belongs to Leiostegiidae'
  • 'Chuanqianoproetus belongs to Proetidae'
  • 'Chuchiaspis belongs to Zacanthoididae'
  • 'Chulanolenus belongs to Estaingiidae'
  • 'Chungkingaspis is a subjective synonym of Leptoplastides'
  • 'Churkinia belongs to Metadoxididae'
  • 'Ciceragnostus is a subjective synonym of Leiagnostus'
  • 'Cilia belongs to Pterocephaliidae'
  • 'Ciliocephalus belongs to Hungaiidae'
  • 'Ciliscutellum belongs to Styginidae'
  • 'Cinnella belongs to Asaphiscidae'
  • 'Circulocrania belongs to Cyclopygidae'
  • 'Cirquella belongs to Nevadiidae'
  • 'Clappaspis is a subjective synonym of Ehmaniella'
  • 'Clariondia belongs to Saukiandidae'
  • 'Clavagnostus belongs to Clavagnostidae'
  • 'Leptagnostus is a subjective synonym of Clavagnostus'
  • 'Leptagnostus is a subjective synonym of Clavagnostus' according to Shergold and Laurie 1997
  • 'Paraclavagnostus is a subjective synonym of Clavagnostus'
  • 'Clavaspidella belongs to Dolichometopidae'
  • 'Clavatellus belongs to Alsataspididae'
  • 'Clavibole belongs to Proetidae'
  • 'Clavigellus belongs to Corynexochidae'
  • 'Clelandia belongs to Kingstoniidae'
  • 'Clevelandella is a subjective synonym of Aphelaspis'
  • 'Cliffia belongs to Phylacteridae'
  • 'Cobboldus is a subjective synonym of Callavia'
  • 'Cochliorrhoe is a subjective synonym of Bergamia'
  • 'Coelaspis is a subjective synonym of Elrathiella'
  • 'Coenaspis belongs to Menomoniidae'
  • 'Coleopachys is a subjective synonym of Meteoraspis'
  • 'Collyrolenus is a subjective synonym of Myopsolenus'
  • 'Colobinion belongs to Pliomeridae'
  • 'Colossaspis belongs to Lichakephalidae'
  • 'Colpocoryphe belongs to Calymenidae'
  • 'Colpocoryphoides is a subjective synonym of Pharostomina'
  • 'Comanchia belongs to Idahoiidae'
  • 'Comanchia minus belongs to Comanchia'
  • 'Comluella belongs to Ellipsocephalidae'
  • 'Compsocephalus belongs to Dinesidae'
  • 'Comptonaspis belongs to Proetidae'
  • 'Comura belongs to Acastidae'
  • 'Conaspis belongs to Dokimocephalidae'
  • 'Conicephalus belongs to Solenopleuridae'
  • 'Coniproetus (Ryckholtia) was reranked as Ryckholtia and belongs to Proetidae'
  • 'Conocephalites is an objective synonym of Conocoryphe'
  • 'Conocephalites (Bavarilla) hofensis is recombined as Bavarilla hofensis'
  • 'Conocephalites cordillerae is recombined as Elrathina cordillerae'
  • 'Conococheaguea belongs to Harpetidae'
  • 'Conococheaquea is a misspelling of Conococheaguea'
  • 'Conocoryphe belongs to Conocoryphidae'
  • 'Conocoryphe (Bailiella) was reranked as Bailiella and belongs to Conocoryphidae'
  • 'Conocoryphe (Conocephalites) kingii is recombined as Elrathia kingi'
  • 'Liocephalus is a subjective synonym of Bailiella'
  • 'Conocoryphidae belongs to Ptychopariida'
  • 'Conoides belongs to Asaphiscidae'
  • 'Conokephalina belongs to Conokephalinidae'
  • 'Conokephalinidae belongs to Ptychopariida'
  • 'Conoparia is a subjective synonym of Otarion'
  • 'Conophillipsia belongs to Proetidae'
  • 'Conophrys belongs to Shumardiidae'
  • 'Conopolus belongs to Ptychopariidae'
  • 'Conoredlichia belongs to Redlichiidae'
  • 'Constantina belongs to Proetidae'
  • 'Contracheirurus belongs to Cheiruridae'
  • 'Coosella belongs to Crepicephalidae'
  • 'Coosia belongs to Crepicephalidae'
  • 'Coosina belongs to Crepicephalidae'
  • 'Corbina belongs to Eurekiidae'
  • 'Corbinia belongs to Eurekiidae'
  • 'Cordapeltis is a subjective synonym of Chotecops'
  • 'Coreanocephalus is a subjective synonym of Changia'
  • 'Cornovica is a subjective synonym of Dindymene'
  • 'Cornucocoryphe is a subjective synonym of Cainatops'
  • 'Cornuproetus belongs to Tropidocoryphidae'
  • 'Cornuproetus (Eopiriproetus) was reranked as Eopiriproetus and belongs to Tropidocoryphidae'
  • 'Cornuproetus (Macroblepharum) was reranked as Macroblepharum and belongs to Tropidocoryphidae'
  • 'Cornuproetus (Tafilaltaspis) was reranked as Tafilaltaspis and belongs to Tropidocoryphidae'
  • 'Cornuproetus (Vicinoproetus) was reranked as Vicinoproetus and belongs to Tropidocoryphidae'
  • 'Cornuproetus (Voigtaspis) was reranked as Voigtaspis and belongs to Tropidocoryphidae'
  • 'Cornuscutellum belongs to Styginidae'
  • 'Coronaspis belongs to Encrinuridae'
  • 'Coronocephalina is a subjective synonym of Coronocephalus'
  • 'Coronocephalus belongs to Encrinuridae'
  • 'Coronocephalus changningensis belongs to Coronocephalus' according to Zhang 1974
  • 'Coronura belongs to Dalmanitidae'
  • 'Corrugatagnostus belongs to Metagnostidae'
  • 'Corycephalus belongs to Dalmanitidae'
  • 'Corydocephalus is a subjective synonym of Trochurus'
  • 'Corynexochidae belongs to Corynexochida'
  • 'Corynexochides belongs to Dolichometopidae'
  • 'Corynexochina belongs to Corynexochidae'
  • 'Corynexochus belongs to Corynexochidae'
  • 'Corynexochus (Bonnia) was reranked as Bonnia and belongs to Dorypygidae'
  • 'Costadiscus is a subjective synonym of Abakolia'
  • 'Costonia belongs to Trinucleidae'
  • 'Cotalagnostus belongs to Peronopsidae'
  • 'Couloumania is a subjective synonym of Conocoryphe'
  • 'Courtessolium belongs to Cheiruridae'
  • 'Craigheadia belongs to Styginidae'
  • 'Crassifimbra belongs to Antagmidae'
  • 'Cremastoglottos is a subjective synonym of Girvanopyge'
  • 'Crepicephalus belongs to Crepicephalidae'
  • 'Crepichilella belongs to Marjumiidae'
  • 'Cristagnostus is a subjective synonym of Linguagnostus'
  • 'Crithias is a subjective synonym of Sao'
  • 'Croixana belongs to Parabolinoididae'
  • 'Cromus belongs to Encrinuridae'
  • 'Crossoura belongs to Trilobita'
  • 'Crotalocephalides belongs to Cheiruridae'
  • 'Crotalocephalina belongs to Cheiruridae'
  • 'Crotalocephalus belongs to Cheiruridae'
  • 'Crotalurus is a subjective synonym of Celmus'
  • 'Crozonaspis belongs to Dalmanitidae'
  • 'Crucicephalus belongs to Eulomidae'
  • 'Crusoia belongs to Solenopleuridae'
  • 'Cryphaeoides belongs to Calmoniidae'
  • 'Cryphina belongs to Acastidae'
  • 'Cryptoderaspis belongs to Catillicephalidae'
  • 'Cryptolithoides belongs to Trinucleidae'
  • 'Cryptolithus belongs to Trinucleidae'
  • 'Ctenocephalus belongs to Conocoryphidae'
  • 'Ctenopyge belongs to Olenidae'
  • 'Ctenoscutellum is a subjective synonym of Avascutellum'
  • 'Culipagnostus is a subjective synonym of Clavagnostus'
  • 'Culmenaspis belongs to Ellipsocephalidae'
  • 'Cummingella belongs to Proetidae'
  • 'Curiaspis belongs to Trilobita'
  • 'Curriella belongs to Encrinuridae'
  • 'Cuyanaspis belongs to Trilobita'
  • 'Cybantyx belongs to Styginidae'
  • 'Cybele belongs to Encrinuridae'
  • 'Cybellela is a subjective synonym of Atractopyge'
  • 'Cybelella [misspelled as Cybellela] belongs to Phacopida' according to Sepkoski 2002
  • 'Cybelina is a subjective synonym of Cybele'
  • 'Cybeloides belongs to Encrinuridae'
  • 'Cybelopsis belongs to Pliomeridae'
  • 'Cybelurus belongs to Encrinuridae'
  • 'Cyclagnostus is a subjective synonym of Acmarhachis'
  • 'Cyclognathina belongs to Olenidae'
  • 'Cyclolorenzella is a subjective synonym of Fenghuangella'
  • 'Cyclolorenzellina [misspelled as Cyclolenzellina] belongs to Trilobita' according to Sepkoski 2002
  • 'Cyclolorenzellina is a subjective synonym of Fenghuangella'
  • 'Cyclolorenzellina is a subjective synonym of Fenghuangella' according to Peng 1987
  • 'Cyclolorenzellina coniformis is recombined as Fenghuangella coniformis' according to Peng 1987
  • 'Cyclopagnostus is a subjective synonym of Hypagnostus'
  • 'Cyclopyge belongs to Cyclopygidae'
  • 'Cyclopyge pachycephala belongs to Cyclopyge' according to Hawle and Corda 1847
  • 'Cyclopyge pachycephala is recombined as Heterocyclopyge pachycephala' according to Marek 1961
  • 'Cyclopygidae belongs to Asaphida'
  • 'Cydonocephalus is a subjective synonym of Kawina'
  • 'Cylindraspis is a subjective synonym of Archegonus'
  • 'Cylindrasppis is a misspelling of Cylindraspis'
  • 'Cylindraspis belongs to Testudinidae'
  • 'Cyphaspides belongs to Aulacopleuridae'
  • 'Cyphaspis belongs to Aulacopleuridae'
  • 'Cyphinioides belongs to Proetidae'
  • 'Cyphinium is a subjective synonym of Ditomopyge'
  • 'Cypholichas is a subjective synonym of Conolichas'
  • 'Cyphoproetus belongs to Proetidae'
  • 'Cyranolichas is a subjective synonym of Hoplolichas'
  • 'Cyrtometopus belongs to Cheiruridae'
  • 'Cyrtoproetus belongs to Proetidae'
  • 'Cyrtoprora belongs to Damesellidae'
  • 'Cyrtosymbole belongs to Proetidae'
  • 'Cyrtosymbole (Cyrtodechenella) was reranked as Cyrtodechenella and belongs to Proetidae'
  • 'Cyrtosymbole (Franconicabole) was reranked as Franconicabole and belongs to Proetidae'
  • 'Cyrtosymbole (Macrobole) drewerensis is recombined as Macrobole drewerensis'
  • 'Cyrtosymbole (Pusillabole) was reranked as Pusillabole and belongs to Proetidae'
  • 'Cyrtosymboloides belongs to Tropidocoryphidae'
  • 'Dactylocephalus belongs to Hungaiidae'
  • 'Daihuaia belongs to Proetidae'
  • 'Dainellicauda is a subjective synonym of Asaphopsoides'
  • 'Dalejeproetus belongs to Tropidocoryphidae'
  • 'Dalmania is replaced by Dalmanites' according to Barrande 1852
  • 'Dalmania dubia belongs to Dalmania' according to Barrande 1852
  • 'Dalmania dubia is recombined as Eudolatites (Destombesites) dubia' according to Snadjr 1987
  • 'Dalmanites belongs to Dalmanitidae'
  • 'Dalmanites (Synphoria) was reranked as Synphoria and belongs to Dalmanitidae'
  • 'Dalmanites oriens belongs to Dalmanites' according to Barrande 1852
  • 'Dalmanites oriens mytoensis belongs to Dalmanites oriens' according to Kloucek 1916
  • 'Dalmanites oriens mytoensis is recombined as Zeliszkella (Mytocephala) mytoensis' according to Struve 1958
  • 'Dalmanites reussi belongs to Dalmanites' according to Barrande 1846
  • 'Dalmanites reussi is recombined as Reussia reussi' according to Maksimova 1972
  • 'Dalmanites reussi is recombined as Reussiana reussi' according to Snajdr 1987
  • 'Dalmanitina belongs to Dalmanitidae'
  • 'Dalmanitina (Eodalmanitina) was reranked as Eodalmanitina and belongs to Dalmanitidae'
  • 'Dalmaniturus belongs to Dalmanitidae'
  • 'Damesella belongs to Damesellidae'
  • 'Damiaoaspis belongs to Lorenzellidae'
  • 'Danangouia is a subjective synonym of Parabadiella'
  • 'Dananzhuangaspis belongs to Proasaphiscidae'
  • 'Danzhaiaspis belongs to Alokistocaridae'
  • 'Dartonaspis belongs to Elviniidae'
  • 'Dasometopus belongs to Holocephalinidae'
  • 'Dayongia belongs to Encrinuridae'
  • 'Daytonia belongs to Dalmanitidae'
  • 'Deacybele belongs to Encrinuridae'
  • 'Deadwoodia is a subjective synonym of Wuhuia'
  • 'Deanaspis belongs to Trinucleidae'
  • 'Deanokephalus belongs to Remopleurididae'
  • 'Dechenella belongs to Proetidae'
  • 'Dechenella (Dechenella) tesca is recombined as Ormistonia tesca' according to Maksimova 1978
  • 'Dechenella (Monodechenella) was reranked as Monodechenella and belongs to Proetidae'
  • 'Dechenella (Pedinodechenella) was reranked as Pedinodechenella and belongs to Proetidae'
  • 'Dechenella martenbergensis is recombined as Clavibole martenbergensis' according to Hahn et al. 1982
  • 'Dechenellurus ursus belongs to Dechenellurus' according to Maksimova 1960
  • 'Deckera belongs to Dokimocephalidae'
  • 'Declivolithus is a subjective synonym of Bohemoharpes'
  • 'Decordinaspis belongs to Trinucleidae'
  • 'Decoroproetus belongs to Tropidocoryphidae'
  • 'Decoroscutellum belongs to Styginidae'
  • 'Decus belongs to Acrocephalitidae'
  • 'Degamella belongs to Cyclopygidae'
  • 'Deiphon belongs to Cheiruridae'
  • 'Deiracephalus belongs to Llanoaspididae'
  • 'Deiradonyx belongs to Dolichometopidae'
  • 'Deissella is a subjective synonym of Bolaspidella'
  • 'Dekalymene belongs to Calymenidae'
  • 'Delagnostus belongs to Agnostina'
  • 'Delaria belongs to Proetidae'
  • 'Delgadoa belongs to Styginidae'
  • 'Delgadodiscus is a subjective synonym of Delgadella'
  • 'Delgadoia is a subjective synonym of Delgadella'
  • 'Dellea belongs to Dokimocephalidae'
  • 'Dellea punctata belongs to Dellea'
  • 'Delleana belongs to Dokimocephalidae'
  • 'Delocare belongs to Acastidae'
  • 'Deloops belongs to Acastidae'
  • 'Delops belongs to Dalmanitidae'
  • 'Deltacare belongs to Trilobita'
  • 'Deltacephalaspis belongs to Calmoniidae'
  • 'Deltadechenella belongs to Proetidae'
  • 'Deltadiscus is a subjective synonym of Eodiscus'
  • 'Deltina belongs to Ptychopariidae'
  • 'Demeterops belongs to Pilekiidae'
  • 'Denaspis belongs to Solenopleuridae'
  • 'Denckmannites belongs to Phacopidae'
  • 'Denemarkia belongs to Tropidocoryphidae'
  • 'Densonella is a subjective synonym of Menomonia'
  • 'Dentaloscutellum belongs to Styginidae'
  • 'Dereimsia is a subjective synonym of Bouleia'
  • 'Derikaspis belongs to Proasaphiscidae'
  • 'Despujolsia belongs to Saukiandidae'
  • 'Destombesites belongs to Dalmanitidae'
  • 'Destombesites was reranked as Eudolatites (Destombesites) and belongs to Eudolatites' according to Snadjr 1987
  • 'Deucalion is a nomen dubium'
  • 'Devonocoryphe is a nomen nudum'
  • 'Devonodontochile is a subjective synonym of Zlichovaspis'
  • 'Diacoryphe belongs to Proetidae'
  • 'Diademaproetus belongs to Tropidocoryphidae'
  • 'Dianops belongs to Phacopidae'
  • 'Diaphanometopidae belongs to Phacopida'
  • 'Diaphanometopus belongs to Diaphanometopidae'
  • 'Diatemnus is a subjective synonym of Bienvillia'
  • 'Dicanthopyge belongs to Aphelaspididae'
  • 'Dicellocephalus finalis is recombined as Diplapatokephalus finalis'
  • 'Diceratocephalina belongs to Acrocephalitidae'
  • 'Diceratocephalus belongs to Diceratocephalidae'
  • 'Diceratocephalus armatus belongs to Diceratocephalus' according to Lu 1954
  • 'Diceratopyge belongs to Ceratopygidae'
  • 'Dicerodiscus belongs to Hebediscidae'
  • 'Dichagnostus is an objective synonym of Pleuroctenium'
  • 'Dichelepyge belongs to Ceratopygidae'
  • 'Dicranogmus belongs to Lichidae'
  • 'Dicranopeltis belongs to Lichidae'
  • 'Dicranopeltoides is a subjective synonym of Dicranopeltis'
  • 'Dicranurus belongs to Odontopleuridae'
  • 'Dictyites is a subjective synonym of Tsinania'
  • 'Didrepanon belongs to Cheiruridae'
  • 'Didwudina belongs to Dokimocephalidae'
  • 'Dienstina belongs to Phacopidae'
  • 'Dignagnostus belongs to Agnostina'
  • 'Digonus belongs to Homalonotidae'
  • 'Digrypos belongs to Dionididae'
  • 'Dikelocephaliidae is corrected as Dikelocephalidae and belongs to Asaphida'
  • 'Dikelocephalopsis belongs to Hungaiidae'
  • 'Dikelocephalus belongs to Dikelocephalidae'
  • 'Dikelokephalina belongs to Hungaiidae'
  • 'Dilatalimbus belongs to Anomocaridae'
  • 'Dilataspis belongs to Dinesidae'
  • 'Dimastocephalus is a subjective synonym of Carolinites'
  • 'Dimeropyge belongs to Dimeropygidae'
  • 'Dimeropygiella belongs to Dimeropygidae'
  • 'Dindymene belongs to Encrinuridae'
  • 'Dindymenella is a subjective synonym of Oedicybele'
  • 'Dinesus belongs to Dinesidae'
  • 'Dionide belongs to Dionididae'
  • 'Dionide miaopoensis belongs to Dionide' according to Lu 1975
  • 'Dionidella belongs to Dionididae'
  • 'Dionidepyga is a subjective synonym of Dionide'
  • 'Dionididae belongs to Asaphida'
  • 'Dipentaspis belongs to Damesellidae'
  • 'Dipharus is a subjective synonym of Hebediscus'
  • 'Diplagnostus belongs to Diplagnostidae'
  • 'Diplapatokephalus belongs to Remopleurididae'
  • 'Dipleura belongs to Homalonotidae'
  • 'Dipleuropyge belongs to Ceratopygidae'
  • 'Diplolichas is a subjective synonym of Radiolichas'
  • 'Dipyrgotes belongs to Damesellidae'
  • 'Dipyrogotes belongs to Damesellidae'
  • 'Discomesites is a subjective synonym of Pagetides'
  • 'Discomesites fragum is recombined as Pagetides fragum'
  • 'Distazeris belongs to Catillicephalidae'
  • 'Paradistazeris is a subjective synonym of Agelagma'
  • 'Distyrax belongs to Encrinuridae'
  • 'Ditomopyge belongs to Proetidae'
  • 'Dividuagnostus belongs to Metagnostidae'
  • 'Dixiphopyge belongs to Aulacopleuridae'
  • 'Dohmiella is a subjective synonym of Gerastos'
  • 'Dokimocephalidae belongs to Ptychopariida'
  • 'Dokimocephalus belongs to Dokimocephalidae'
  • 'Dolerasaphus is a subjective synonym of Paramegalaspis'
  • 'Dolerobasilicus is a subjective synonym of Basilicus'
  • 'Dolerolichia belongs to Saukiandidae'
  • 'Dolgaia is a subjective synonym of Kaninia'
  • 'Dolgeuloma belongs to Eulomidae'
  • 'Dolichagnostus is corrected as Dolichoagnostus and belongs to Diplagnostidae'
  • 'Dolichoharpes belongs to Harpetidae'
  • 'Dolichometopsis belongs to Dolichometopidae'
  • 'Dolichometopus belongs to Dolichometopidae'
  • 'Dolichometopus (Housia) was reranked as Housia and belongs to Pterocephaliidae'
  • 'Doremataspis belongs to Liostracinidae'
  • 'Dorypygina belongs to Dorypygidae'
  • 'Douposiella belongs to Ptychopariidae'
  • 'Drabia belongs to Phylacteridae'
  • 'Drepanopyge belongs to Yinitidae'
  • 'Drepanura belongs to Damesellidae'
  • 'Drepanuroides belongs to Yinitidae'
  • 'Paradrepanuroides is a subjective synonym of Qingkouia' according to W. Zhang et al. 1997
  • 'Dresbachia belongs to Menomoniidae'
  • 'Drevermannia belongs to Proetidae'
  • 'Drevermannia (Palpebralia) herrmanni belongs to Drevermannia (Palpebralia)' according to Richter and Richter 1943
  • 'Drevermannia (Palpebralia) palpebralis is recombined as Palpebralia palpebralis'
  • 'Drevermannia (Prodrevermannia) was reranked as Prodrevermannia and belongs to Tropidocoryphidae'
  • 'Dreyfussina belongs to Dalmanitidae'
  • 'Drotops belongs to Phacopidae'
  • 'Drumaspis belongs to Elviniidae'
  • 'Dubhglasina belongs to Harpetidae'
  • 'Ductina belongs to Phacopidae'
  • 'Dudleyaspis belongs to Odontopleuridae'
  • 'Dudu belongs to Proetidae'
  • 'Duftonia belongs to Dalmanitidae'
  • 'Duibianaspis belongs to Idahoiidae'
  • 'Dulanaspis belongs to Styginidae'
  • 'Dunderbergella belongs to Asaphiscidae'
  • 'Dunderbergia belongs to Elviniidae'
  • 'Durinia belongs to Lonchocephalidae'
  • 'Duyunaspis belongs to Oryctocephalidae'
  • 'Dysplanus belongs to Illaenidae'
  • 'Dytremacephalus belongs to Elviniidae'
  • 'Dytremacephalus asperaxis belongs to Dytremacephalus'
  • 'Ebenzeria is an objective synonym of Elliptocephala'
  • 'Eccaparadoxides is a subjective synonym of Phanoptes'
  • 'Eccoptochile belongs to Cheiruridae'
  • 'Echinophacops belongs to Phacopidae'
  • 'Echinopyge belongs to Acastidae'
  • 'Ectenaspis belongs to Asaphidae'
  • 'Ectenonotus belongs to Pliomeridae'
  • 'Ectillaenus belongs to Illaenidae'
  • 'Edelsteinaspis belongs to Edelsteinaspididae'
  • 'Edgellia is an objective synonym of Trinucleus'
  • 'Edithiella belongs to Asaphiscidae'
  • 'Ehmania belongs to Alokistocaridae'
  • 'Ehmaniella belongs to Alokistocaridae'
  • 'Eirelithus belongs to Trinucleidae'
  • 'Ejinaspis belongs to Solenopleuridae'
  • 'Ekwanoscutellum belongs to Styginidae'
  • 'Elandaspis belongs to Anomocaridae'
  • 'Elankaspis is a subjective synonym of Pseudokainella'
  • 'Elatius is a subjective synonym of Kingaspidoides'
  • 'Elbaspis is a subjective synonym of Miraspis'
  • 'Elburgia belongs to Elviniidae'
  • 'Eldoradia belongs to Bolaspididae'
  • 'Eldredgeops belongs to Phacopidae'
  • 'Elegantaspis belongs to Aphelaspididae'
  • 'Elegestina belongs to Chengkouaspididae'
  • 'Eleutherocentrus belongs to Bathyuridae'
  • 'Elganellus belongs to Redlichiidae'
  • 'Elicicola belongs to Yunnanocephalidae'
  • 'Elimaproetus belongs to Proetidae'
  • 'Elkanaspis is a subjective synonym of Pseudokainella'
  • 'Elkia belongs to Dikelocephalidae'
  • 'Ellipsocephalidae belongs to Ptychopariida'
  • 'Ellipsocephaloides belongs to Ellipsocephaloididae'
  • 'Ellipsocephaloididae belongs to Ptychopariida'
  • 'Ellipsocephalus belongs to Ellipsocephalidae'
  • 'Ellipsostrenua belongs to Ellipsocephalidae'
  • 'Ellipsotaphrus belongs to Cyclopygidae'
  • 'Ellipsuella is a nomen nudum'
  • 'Elliptocephala belongs to Holmiidae'
  • 'Elliptophillipsia belongs to Proetidae'
  • 'Ellsaspis belongs to Raphiophoridae'
  • 'Elongatanileus belongs to Nileidae'
  • 'Elrathiella belongs to Alokistocaridae'
  • 'Elrathina is a subjective synonym of Ptychoparella'
  • 'Elvinaspis belongs to Elviniidae'
  • 'Elvinaspis explicatus belongs to Elvinaspis' according to Ergaliev 2001
  • 'Elvinia belongs to Elviniidae'
  • 'Elviniella belongs to Elviniidae'
  • 'Elviniidae belongs to Ptychopariida'
  • 'Elvinoides belongs to Elviniidae'
  • 'Elviraspis belongs to Elviniidae'
  • 'Elyaspis belongs to Elviniidae'
  • 'Elyx belongs to Conocoryphidae'
  • 'Emanuelaspis belongs to Asaphidae'
  • 'Emeidiscus is a subjective synonym of Tsunyidiscus'
  • 'Emmrichella is a subjective synonym of Lioparia' according to Zhang 1985
  • 'Emmrichops belongs to Cyclopygidae'
  • 'Emsurella belongs to Cheilocephalidae'
  • 'Emsurina belongs to Pilekiidae'
  • 'Enammocephalus belongs to Palaeolenidae'
  • 'Enantiaspis belongs to Metadoxididae'
  • 'Encrinuraspis is a subjective synonym of Cromus'
  • 'Encrinuraspis optimus is recombined as Cromus optimus' according to Struve 1980
  • 'Encrinurella belongs to Pliomeridae'
  • 'Encrinuroides belongs to Encrinuridae'
  • 'Encrinuroides uncatus is recombined as Prophysemataspis uncatus'
  • 'Encrinurus belongs to Encrinuridae'
  • 'Endoaspis is a subjective synonym of Annamitella'
  • 'Endymionia belongs to Raphiophoridae'
  • 'Entomaspis belongs to Harpetidae'
  • 'Entomostracites is a subjective synonym of Paradoxides'
  • 'Entomostracites expansus is recombined as Asaphus expansus'
  • 'Entomostracites extenuatus is recombined as Megistaspidella extenuatus'
  • 'Entomostracites laciniatus is recombined as Lichas laciniatus'
  • 'Entomostracites paradoxissimus is recombined as Paradoxides paradoxissimus'
  • 'Entomostracites pisiformis is recombined as Agnostus pisiformis'
  • 'Entsyna belongs to Ptychopariidae'
  • 'Eoacidaspis belongs to Lichakephalidae'
  • 'Eoanomocarella belongs to Anomocarellidae'
  • 'Eoapatokephalus belongs to Remopleurididae'
  • 'Eoasaphus belongs to Asaphidae'
  • 'Eobronteus belongs to Styginidae'
  • 'Eocatuniella belongs to Anomocaridae'
  • 'Eocheirurus belongs to Trilobita'
  • 'Eochuangia belongs to Leiostegiidae'
  • 'Eocorycephalus is an objective synonym of Synphoria'
  • 'Eocorynexochus belongs to Corynexochidae'
  • 'Eocryphops belongs to Phacopidae'
  • 'Eocyphinium belongs to Proetidae'
  • 'Eocyrtosymbole belongs to Proetidae'
  • 'Eocyrtosymbole magnifica belongs to Eocyrtosymbole' according to Pillet 1973
  • 'Eodindymene belongs to Encrinuridae'
  • 'Eodiscus tingi is recombined as Tsunyidiscus tingi' according to Zhang and Jell 1987
  • 'Eodontopleura belongs to Amgaspididae'
  • 'Eodrevermannia belongs to Proetidae'
  • 'Eodrevermannia (Erbenaspis) was reranked as Erbenaspis and belongs to Proetidae'
  • 'Eodrevermannia kettneri belongs to Eodrevermannia' according to Chlupáč 1965
  • 'Eodrevermannia kettneri is recombined as Moravocoryphe kettneri' according to Pribyl and Vanĕk 1978
  • 'Eoharpes belongs to Harpetidae'
  • 'Eohomalonotus belongs to Homalonotidae'
  • 'Eoisotelus belongs to Asaphidae'
  • 'Eokochaspis belongs to Ptychopariidae'
  • 'Eokosovopeltis belongs to Styginidae'
  • 'Eoleonaspis belongs to Odontopleuridae'
  • 'Eomalungia belongs to Estaingiidae'
  • 'Eomonorachus belongs to Pterygometopidae'
  • 'Eopalpebralia belongs to Drevermanniinae' according to Alberti 2000
  • 'Eophacops belongs to Phacopidae'
  • 'Eoproetus belongs to Asaphiscidae'
  • 'Eoptychaspis belongs to Ptychaspididae'
  • 'Eoptychoparia is a subjective synonym of Ptychoparella'
  • 'Eorobergia belongs to Remopleurididae'
  • 'Eosaukia belongs to Saukiidae'
  • 'Eoscutellum belongs to Styginidae'
  • 'Eoshengia belongs to Lisaniidae'
  • 'Eosoptychoparia is a subjective synonym of Zhenganites'
  • 'Eosoptychopyge is a subjective synonym of Zhenganites'
  • 'Eospencia belongs to Ptychopariidae'
  • 'Eotrinucleus belongs to Harpetidae'
  • 'Eowuhuia belongs to Ptychaspididae'
  • 'Erbenia belongs to Asaphiscidae'
  • 'Erbenicoryphe belongs to Tropidocoryphidae'
  • 'Erbenites belongs to Proetidae'
  • 'Erbia belongs to Dinesidae'
  • 'Erbiella belongs to Dinesidae'
  • 'Erbina belongs to Dinesidae'
  • 'Erbiopsidella belongs to Dinesidae'
  • 'Erbiopsis belongs to Dinesidae'
  • 'Erdoradites belongs to Alokistocaridae'
  • 'Eremiproetus belongs to Tropidocoryphidae'
  • 'Erixanium belongs to Aphelaspididae'
  • 'Ermanella belongs to Bathyuridae'
  • 'Erratencrinurus belongs to Encrinuridae'
  • 'Erzishania belongs to Antagmidae'
  • 'Eshelmania is a subjective synonym of Dellea'
  • 'Esmeraldina is a subjective synonym of Holmia'
  • 'Esseigania belongs to Tsinaniidae'
  • 'Estaingia belongs to Estaingiidae'
  • 'Estaingiidae belongs to Ptychopariida'
  • 'Estoniops belongs to Pterygometopidae'
  • 'Eteraspis belongs to Asaphiscidae'
  • 'Etheridgaspis belongs to Hystricuridae'
  • 'Eucalymene is a subjective synonym of Pseudocalymene'
  • 'Eudechenella is an objective synonym of Dechenella'
  • 'Eudolatites belongs to Dalmanitidae'
  • 'Eudolatites (Banilatites) belongs to Eudolatites' according to Destombes 1972
  • 'Eudolatites (Deloites) was reranked as Deloites and belongs to Dalmanitidae'
  • 'Eugonocare belongs to Aphelaspididae'
  • 'Euloma belongs to Eulomidae'
  • 'Euloma (Plecteuloma) was reranked as Plecteuloma and belongs to Eulomidae'
  • 'Eulomella belongs to Trilobita'
  • 'Eulomidae belongs to Ptychopariida'
  • 'Eulomina belongs to Bathycheilidae'
  • 'Euonchonotina belongs to Olenidae'
  • 'Euptychaspis belongs to Ptychaspididae'
  • 'Eurekia belongs to Eurekiidae'
  • 'Eurodeois is a subjective synonym of Amphoton'
  • 'Eurostina belongs to Ptychopariidae'
  • 'Eurudagnostus is a subjective synonym of Oncagnostus'
  • 'Eurycare belongs to Olenidae'
  • 'Eutrimerocephalus is an objective synonym of Trimerocephalus'
  • 'Evagena belongs to Proetidae'
  • 'Evropeites belongs to Pliomeridae'
  • 'Exallaspis belongs to Odontopleuridae'
  • 'Exastipyx belongs to Styginidae'
  • 'Exigua belongs to Plethopeltidae'
  • 'Eymekops belongs to Proasaphiscidae'
  • 'Ezhimia belongs to Saukiandidae'
  • 'Ezhuangia belongs to Dolichometopidae'
  • 'Fabulaspis belongs to Trilobita'
  • 'Faciura belongs to Trilobita'
  • 'Failleana belongs to Styginidae'
  • 'Falanaspis belongs to Alsataspididae'
  • 'Falcatoproetus is a subjective synonym of Proetus'
  • 'Fallagnostus is a subjective synonym of Condylopyge'
  • 'Famatinolithus belongs to Trinucleidae'
  • 'Fandianaspis belongs to Redlichiina'
  • 'Fatocephalus is a subjective synonym of Pseudokainella'
  • 'Feilongshania belongs to Oryctocephalidae'
  • 'Fenestraspis belongs to Dalmanitidae'
  • 'Fenghuangella belongs to Diceratocephalidae'
  • 'Ferenepea belongs to Nepeidae'
  • 'Ferralsia belongs to Palaeolenidae'
  • 'Feruminops belongs to Acastidae'
  • 'Fieldaspis belongs to Zacanthoididae'
  • 'Fimbriomarrolithus is an objective synonym of Telaeomarrolithus'
  • 'Fissanomocarella belongs to Anomocarellidae'
  • 'Fissocephalus belongs to Harpetidae'
  • 'Flabellocephalus belongs to Pterocephaliidae'
  • 'Flexicalymene belongs to Calymenidae'
  • 'Flexicalymene (Onnicalymene) was reranked as Onnicalymene and belongs to Calymenidae'
  • 'Folliceps belongs to Nepeidae'
  • 'Forchhammeria belongs to Anomocaridae'
  • 'Fordaspis belongs to Dorypygidae'
  • 'Forillonaria belongs to Dalmanitidae'
  • 'Formonia belongs to Proetidae'
  • 'Formosagnostus is a subjective synonym of Hadragnostus'
  • 'Formosocephalus belongs to Anomocaridae'
  • 'Forteyops belongs to Cheiruridae'
  • 'Foulonia belongs to Cheiruridae'
  • 'Fragiscutum belongs to Encrinuridae'
  • 'Frammia belongs to Encrinuridae'
  • 'Francovichia belongs to Dalmanitidae'
  • 'Fremontia belongs to Olenellidae'
  • 'Frencrinuroides belongs to Encrinuridae'
  • 'Frithjofia belongs to Proetidae'
  • 'Fritzolenellus belongs to Olenellidae'
  • 'Frognaspis belongs to Ityophoridae'
  • 'Fuchouia belongs to Dolichometopidae'
  • 'Parafuchouia is a subjective synonym of Amphoton'
  • 'Fuminaspis belongs to Metadoxididae'
  • 'Fuquania belongs to Anomocaridae'
  • 'Furacopyge belongs to Dalmanitidae'
  • 'Furcalithus belongs to Trinucleidae'
  • 'Fuscinipyge belongs to Proetidae'
  • 'Fuyunia belongs to Asaphidae'
  • 'Gabriceraurus belongs to Cheiruridae'
  • 'Gabriellus belongs to Olenellidae'
  • 'Galeaspis belongs to Catillicephalidae'
  • 'Galerosaukia belongs to Saukiidae'
  • 'Gamonedaspis belongs to Dalmanitidae'
  • 'Ganinella belongs to Proetidae'
  • 'Ganovexopyge belongs to Alokistocaridae'
  • 'Gaoloupingia belongs to Shumardiidae'
  • 'Gaotanaspis belongs to Ptychopariidae'
  • 'Gaotania belongs to Odontopleuridae'
  • 'Gapeevella belongs to Proetidae'
  • 'Gaphuraspis belongs to Ptychopariidae'
  • 'Gastropolus belongs to Cyclopygidae'
  • 'Geesops belongs to Phacopidae'
  • 'Gelasene belongs to Edelsteinaspididae'
  • 'Genevievella belongs to Llanoaspididae'
  • 'Gentilapsis is a nomen nudum'
  • 'Georgiellus is an objective synonym of Elliptocephala'
  • 'Georhithronella belongs to Proetidae'
  • 'Geraldinella belongs to Archaeaspididae'
  • 'Gerasaphes belongs to Asaphidae'
  • 'Devonoproetus is a subjective synonym of Proetus'
  • 'Gerastos (Oehlertaspis) was reranked as Oehlertaspis and belongs to Proetidae'
  • 'Gerastos (Oehlertaspis) belongs to Gerastos' according to Pillet and Vanek 1973
  • 'Germaropyge is a subjective synonym of Ellipsocephalus'
  • 'Gibbocephalus is an objective synonym of Crotalocephalina'
  • 'Gigantopygus belongs to Gigantopygidae'
  • 'Gignopeltis belongs to Bathyuridae'
  • 'Gigoutella belongs to Palaeolenidae'
  • 'Giordanella belongs to Dolerolenidae'
  • 'Girandia belongs to Pagodiidae'
  • 'Girvanagnostus is a subjective synonym of Arthrorhachis'
  • 'Girvanopyge belongs to Cyclopygidae'
  • 'Gitarra belongs to Proetidae'
  • 'Glaberagnostus belongs to Agnostina'
  • 'Glabrella belongs to Ellipsocephalidae'
  • 'Glabretina belongs to Hystricuridae'
  • 'Glaphurina belongs to Raymondinidae'
  • 'Glaphurus belongs to Raymondinidae'
  • 'Glaphyraspis belongs to Lonchocephalidae'
  • 'Globampyx belongs to Raphiophoridae'
  • 'Globulaspis belongs to Odontopleuridae'
  • 'Globusia belongs to Proetidae'
  • 'Glockeria is an objective synonym of Phacopidella'
  • 'Gloria is replaced by Gloriagloria'
  • 'Gloriagloria belongs to Proasaphiscidae'
  • 'Glossopleura belongs to Dolichometopidae'
  • 'Glyphanellus belongs to Anomocaridae'
  • 'Glyphaspellus belongs to Anomocaridae'
  • 'Glyphaspis belongs to Anomocarellidae'
  • 'Glyphopeltis belongs to Marjumiidae'
  • 'Glyptagnostidae belongs to Agnostida'
  • 'Glyptagnostus belongs to Glyptagnostidae'
  • 'Glyptambon belongs to Dalmanitidae'
  • 'Glyptometopsis belongs to Dokimocephalidae'
  • 'Glyptometopus belongs to Dokimocephalidae'
  • 'Gog belongs to Asaphidae'
  • 'Gogiura belongs to Asaphidae'
  • 'Gogoella belongs to Pliomeridae'
  • 'Goldfieldia is a subjective synonym of Lancastria'
  • 'Goldfussia is an objective synonym of Scutellum'
  • 'Goldfussia is replaced by Goldfussius' according to Barrande 1852
  • 'Goldfussius is an objective synonym of Goldfussia'
  • 'Goldillaenoides belongs to Styginidae'
  • 'Goldillaenus belongs to Styginidae'
  • 'Goldius is a subjective synonym of Scutellum'
  • 'Gondwanaspis is a subjective synonym of Taemasaspis'
  • 'Gondwanaspis mrirtensis is recombined as Taemasaspis mrirtensis'
  • 'Goniophrys belongs to Telephinidae'
  • 'Goniopleura is a nomen oblitum'
  • 'Goniotelina belongs to Bathyuridae'
  • 'Gonioteloides belongs to Redlichiina'
  • 'Goniotelus belongs to Bathyuridae'
  • 'Goodsiraspis is a subjective synonym of Malimanaspis'
  • 'Gourdonia belongs to Acastidae'
  • 'Goycoia belongs to Trilobita'
  • 'Gracemerea belongs to Proetidae'
  • 'Graciella belongs to Lonchocephalidae'
  • 'Grandagnostus belongs to Agnostina'
  • 'Grandioculus belongs to Proasaphiscidae'
  • 'Granolenus belongs to Dolerolenidae'
  • 'Granolenus midi belongs to Granolenus' according to Jago 1980
  • 'Granularaspis [misspelled as Granularapis] belongs to Corynexochida' according to Sepkoski 2002
  • 'Granularaspis belongs to Dolichometopidae'
  • 'Granularia is replaced by Granularaspis'
  • 'Granuloagnostus belongs to Metagnostidae'
  • 'Gravicalymene belongs to Calymenidae'
  • 'Griffithidella belongs to Proetidae'
  • 'Griffithides belongs to Proetidae'
  • 'Griffithides (Particeps) was reranked as Particeps and belongs to Proetidae'
  • 'Grinnellaspis belongs to Bathyuridae'
  • 'Griphasaphus belongs to Asaphidae'
  • 'Groenwallia belongs to Andrarinidae'
  • 'Groenwallina belongs to Andrarinidae'
  • 'Guandacolithus belongs to Trinucleidae'
  • 'Guangyuanaspis belongs to Abadiellidae'
  • 'Guankouia belongs to Proasaphiscidae'
  • 'Guichenia belongs to Dalmanitidae'
  • 'Guizhouanomocare belongs to Anomocaridae'
  • 'Guizhoudiscus is a subjective synonym of Tsunyidiscus' according to Zhang and Jell 1987
  • 'Guizhoupliomerops belongs to Pliomeridae'
  • 'Gunnia belongs to Ptychopariidae'
  • 'Gymnagnostus belongs to Agnostidae'
  • 'Gymnostomix belongs to Trinucleidae'
  • 'Gyroma is a subjective synonym of Agniesella'
  • 'Gyrometopus belongs to Diaphanometopidae'
  • 'Haasia belongs to Proetidae'
  • 'Habrocephalus belongs to Palaeolenidae'
  • 'Hadragnostus belongs to Ammagnostidae'
  • 'Hadrocephalites belongs to Ptychopariidae'
  • 'Hadromeros belongs to Cheiruridae'
  • 'Hadrorachus belongs to Calmoniidae'
  • 'Hadrorachus is replaced by Hadrorakos' according to Del 1940
  • 'Hadrorakos is an objective synonym of Hadrorachus'
  • 'Haibowania is a subjective synonym of Damesella'
  • 'Hallaspis is a subjective synonym of Pemphigaspis'
  • 'Hamashania belongs to Saukiidae'
  • 'Hamatolenus belongs to Ellipsocephalidae'
  • 'Hamiroproetus belongs to Proetidae'
  • 'Hammannopyge belongs to Cheiruridae'
  • 'Hammatocnemis is a subjective synonym of Ovalocephalus'
  • 'Hanburia belongs to Dolichometopidae'
  • 'Hanchungolithus belongs to Trinucleidae'
  • 'Hancrania belongs to Olenidae'
  • 'Hancrania brevilimbata belongs to Hancrania' according to Kobayashi 1962
  • 'Hanivella belongs to Anomocaridae'
  • 'Haniwa belongs to Remopleurididae'
  • 'Haniwoides belongs to Ceratopygidae'
  • 'Hanjiangaspis belongs to Rorringtoniidae'
  • 'Hanshania belongs to Anomocarellidae'
  • 'Hanzhongaspis belongs to Isocolidae'
  • 'Hapalopleura belongs to Alsataspididae'
  • 'Haploconus is replaced by Dimeropyge' according to Opik 1937
  • 'Hapsiceraurus belongs to Cheiruridae'
  • 'Hapsidocare belongs to Kaolishaniidae'
  • 'Harataspis belongs to Anomocaridae'
  • 'Hardyia belongs to Missisquoiidae'
  • 'Hardyoides belongs to Norwoodiidae'
  • 'Harpidella belongs to Aulacopleuridae'
  • 'Harpides belongs to Harpididae'
  • 'Harpididae belongs to Harpetida'
  • 'Harpidoides belongs to Harpididae'
  • 'Harpillaenus belongs to Illaenidae'
  • 'Harringtonacaste belongs to Acastidae'
  • 'Harrisia is replaced by Clelandia' according to Cossmann 1902
  • 'Harrisia parabola is recombined as Clelandia parabola'
  • 'Harrisia parabola is recombined as Clelandia parabola' according to Cossmann 1902
  • 'Hartella belongs to Conocoryphidae'
  • 'Hartshillia belongs to Corynexochidae'
  • 'Hartshillina belongs to Corynexochidae'
  • 'Hassiabole belongs to Proetidae'
  • 'Hastagnostus belongs to Agnostina'
  • 'Hatangia belongs to Proasaphiscidae'
  • 'Hausmannia is an objective synonym of Odontochile'
  • 'Hausmannia is an objective synonym of Odontochile'
  • 'Hausmannia is a subjective synonym of Dalmanites'
  • 'Hawkinsaspis belongs to Lonchocephalidae'
  • 'Hawkinsia is replaced by Hawkinsaspis'
  • 'Hebediscina belongs to Yukoniidae'
  • 'Hebediscus is a subjective synonym of Dipharus'
  • 'Hebediscus orientalis is recombined as Hupeidiscus orientalis'
  • 'Hedinaspis belongs to Ceratopygidae'
  • 'Hedstroemia belongs to Proetidae'
  • 'Helepagetia belongs to Eodiscidae'
  • 'Helieranella belongs to Olenidae'
  • 'Heliocephalus is a subjective synonym of Dalmanites'
  • 'Helioharpes is a subjective synonym of Harpes'
  • 'Heliomera belongs to Cheiruridae'
  • 'Heliomeroides belongs to Cheiruridae'
  • 'Helioproetoides is a nomen nudum'
  • 'Helioproetus belongs to Proetidae'
  • 'Heliopyge belongs to Acastidae'
  • 'Helokybe belongs to Proetidae'
  • 'Hemiarges belongs to Lichidae'
  • 'Hemibarrandia belongs to Panderiidae'
  • 'Hemigyraspis is a subjective synonym of Asaphellus'
  • 'Hemikaolishania belongs to Kaolishaniidae'
  • 'Hemirhodon belongs to Dolichometopidae'
  • 'Hemisphaerocoryphe is a subjective synonym of Sphaerocoryphe'
  • 'Henadoparia belongs to Cedariidae'
  • 'Heptabronteus is a subjective synonym of Kosovopeltis'
  • 'Hercantyx belongs to Damesellidae'
  • 'Hermosella is a subjective synonym of Jegorovaia'
  • 'Herse belongs to Solenopleuridae'
  • 'Hesslerides belongs to Proetidae'
  • 'Heterocaryon belongs to Harpetidae'
  • 'Heterocyclopyge is a subjective synonym of Selenoptychus'
  • 'Hexacopyge belongs to Remopleurididae'
  • 'Hexacosta belongs to Acastidae'
  • 'Hexianella is a subjective synonym of Brackebuschia'
  • 'Heyelingella is a subjective synonym of Iranoleesia'
  • 'Hibbertia belongs to Harpetidae'
  • 'Hicksia belongs to Dorypygidae'
  • 'Hidascutellum belongs to Styginidae'
  • 'Highgatella belongs to Olenidae'
  • 'Hillyardina belongs to Hystricuridae'
  • 'Hindermeyeria is a subjective synonym of Strenuaeva'
  • 'Hintzeia belongs to Pliomeridae'
  • 'Hispaniaspis belongs to Odontopleuridae'
  • 'Histiomona belongs to Damesellidae'
  • 'Hoekaspis belongs to Asaphidae'
  • 'Holasaphus belongs to Ptychopariidae'
  • 'Holcacephalus belongs to Norwoodiidae'
  • 'Holdenia belongs to Isocolidae'
  • 'Holia belongs to Cheiruridae'
  • 'Hollardia belongs to Tropidocoryphidae'
  • 'Hollardops belongs to Acastidae'
  • 'Holmdalia belongs to Marjumiidae'
  • 'Holmia rowei is recombined as Esmeraldina rowei'
  • 'Holocephalina belongs to Holocephalinidae'
  • 'Holocephalinidae belongs to Ptychopariida'
  • 'Holocephalites belongs to Holocephalinidae'
  • 'Holometopus is replaced by Warburgella'
  • 'Holotrachelus belongs to Holotrachelidae'
  • 'Holoubkocheilus belongs to Bavarillidae'
  • 'Holubaspis belongs to Hystricuridae'
  • 'Holyoakia belongs to Emuellidae'
  • 'Homagnostus belongs to Agnostidae'
  • 'Homalonotidae belongs to Phacopida'
  • 'Homalonotus belongs to Homalonotidae'
  • 'Homalopteon belongs to Nileidae'
  • 'Homalopyge belongs to Asaphidae'
  • 'Homotelus is a subjective synonym of Isotelus'
  • 'Honania is a subjective synonym of Grandioculus'
  • 'Hongjunshaoia belongs to Yinitidae'
  • 'Hongshiyanaspis belongs to Metadoxididae'
  • 'Hopolichoides belongs to Lichidae'
  • 'Hospes belongs to Trilobita'
  • 'Houmengia belongs to Antagmidae'
  • 'Howellaspis belongs to Menomoniidae'
  • 'Hsuaspis is a subjective synonym of Estaingia'
  • 'Huaibeia belongs to Proasaphiscidae'
  • 'Huainania belongs to Inouyiidae'
  • 'Huayuania belongs to Anomocarellidae'
  • 'Huemacaspis belongs to Homalonotidae'
  • 'Hukasawaia belongs to Remopleurididae'
  • 'Humeia belongs to Proetidae'
  • 'Humilogriffithides belongs to Proetidae'
  • 'Hunanaspis belongs to Anomocaridae'
  • 'Hunanocephalus [misspelled as Hunnanocephalus] belongs to Corynexochida' according to Sepkoski 2002
  • 'Hunanocephalus belongs to Oryctocephalidae'
  • 'Hunanoproetus belongs to Proetidae'
  • 'Hunanopyge belongs to Ceratopygidae'
  • 'Hundwarella belongs to Proasaphiscidae'
  • 'Hungaia belongs to Hungaiidae'
  • 'Hungaiidae belongs to Asaphida'
  • 'Hungioides belongs to Hungaiidae'
  • 'Hunnebergia belongs to Asaphidae'
  • 'Huntonia is replaced by Huntoniatonia'
  • 'Huntoniatonia belongs to Dalmanitidae'
  • 'Hupeia belongs to Estaingiidae'
  • 'Hupeidiscus is a subjective synonym of Tsunyidiscus'
  • 'Hupeolenus belongs to Ellipsocephalidae'
  • 'Huzhuia belongs to Solenopleuridae'
  • 'Hyboaspis belongs to Illaenidae'
  • 'Hybocephalus belongs to Trilobita'
  • 'Hydrolaenus is a subjective synonym of Thaleops'
  • 'Hypagnostus belongs to Peronopsidae'
  • 'Hypaproetus belongs to Proetidae'
  • 'Hyperagnostus is a subjective synonym of Pseudorhaptagnostus'
  • 'Hyperbolochilus belongs to Hystricuridae'
  • 'Hypermecaspis belongs to Olenidae'
  • 'Hyperoparia belongs to Solenopleuridae'
  • 'Hypodicranotus belongs to Remopleurididae'
  • 'Hypothetica is a subjective synonym of Entomaspis'
  • 'Hyrokybe belongs to Cheiruridae'
  • 'Hysterolenus belongs to Ceratopygidae'
  • 'Hysteropleura belongs to Menomoniidae'
  • 'Hystricuridae belongs to Proetida'
  • 'Hystricurus belongs to Hystricuridae'
  • 'Iberocoryphe belongs to Homalonotidae'
  • 'Ibexaspis belongs to Pliomeridae'
  • 'Ichangia belongs to Estaingiidae'
  • 'Ichangia ichangensis belongs to Ichangia' according to Chang 1965
  • 'Ichangolithus is a subjective synonym of Hanchungolithus'
  • 'Ichiyamella is a subjective synonym of Parayoungia'
  • 'Ichiyamella subglobula is recombined as Parayoungia subglobula'
  • 'Idahoia is a subjective synonym of Saratogia'
  • 'Idahoiidae belongs to Asaphida'
  • 'Iddingsia belongs to Dokimocephalidae'
  • 'Idiomesus belongs to Ptychaspididae'
  • 'Idiorapha belongs to Trilobita'
  • 'Idolagnostus belongs to Agnostidae'
  • 'Igarkiella belongs to Anomocaridae'
  • 'Iglesiella belongs to Redlichiidae'
  • 'Ignoproetus belongs to Tropidocoryphidae'
  • 'Ignotogregatus belongs to Ignotogregatidae'
  • 'Ijacephalus belongs to Acrocephalitidae'
  • 'Illaenoides belongs to Styginidae'
  • 'Illaenopsis belongs to Nileidae'
  • 'Illaenula belongs to Phacopidae'
  • 'Illaenurus belongs to Illaenuridae'
  • 'Illaenus belongs to Illaenidae'
  • 'Illaenus conifrons is recombined as Thaleops conifrons'
  • 'Incaia belongs to Trinucleidae'
  • 'Incisopyge is a subjective synonym of Novakella'
  • 'Inglefieldia belongs to Alokistocaridae'
  • 'Ingriops belongs to Pterygometopidae'
  • 'Iniospheniscus belongs to Diplagnostidae'
  • 'Iniotoma belongs to Asaphiscidae'
  • 'Inkouia belongs to Olenidae'
  • 'Innitagnostus is a subjective synonym of Agnostus'
  • 'Inouyina belongs to Namanoiidae'
  • 'Inouyops belongs to Lorenzellidae'
  • 'Inoyellaspis belongs to Lorenzellidae'
  • 'Interalia belongs to Lonchocephalidae'
  • 'Interproetus belongs to Tropidocoryphidae'
  • 'Iohomia belongs to Anomocaridae'
  • 'Iolgia belongs to Redlichiina'
  • 'Iranaspidion belongs to Proetidae'
  • 'Iranaspis belongs to Leiostegiidae'
  • 'Irannella is a subjective synonym of Maladioidella'
  • 'Irannella is a subjective synonym of Maladioidella' according to Shergold and Sdzuy 1984
  • 'Iranoleesia belongs to Proasaphiscidae'
  • 'Irgitkhemia belongs to Redlichiidae'
  • 'Iriania is a subjective synonym of Brachymetopus'
  • 'Iriania jayae is recombined as Brachymetopus jayae'
  • 'Irinia belongs to Anomocaridae'
  • 'Irvingella belongs to Elviniidae'
  • 'Irvingelloides belongs to Trilobita'
  • 'Isabelinia belongs to Asaphidae'
  • 'Isalaux belongs to Pterygometopidae'
  • 'Isbergia belongs to Rorringtoniidae'
  • 'Ischyrophyma is a subjective synonym of Celmus'
  • 'Ischyrotoma belongs to Dimeropygidae'
  • 'Ishpella belongs to Trilobita'
  • 'Isocolidae belongs to Ptychopariida'
  • 'Isoprusia belongs to Odontopleuridae'
  • 'Isoteloides belongs to Asaphidae'
  • 'Isotelus belongs to Asaphidae'
  • 'Issafenia is a nomen nudum'
  • 'Issafeniella belongs to Ellipsocephalidae'
  • 'Isyrakopeltis belongs to Asaphidae'
  • 'Itagnostus is a subjective synonym of Peronopsis' according to Robison 1988
  • 'Itagnostus is a subjective synonym of Peronopsis'
  • 'Ithycephalus belongs to Kingstoniidae'
  • 'Ithyektyphus belongs to Marjumiidae'
  • 'Ityophoridae belongs to Ptychopariida'
  • 'Ivanopleura belongs to Odontopleuridae'
  • 'Iveria belongs to Eulomidae'
  • 'Ivshinagnostus belongs to Agnostidae'
  • 'Ivshinaspis belongs to Remopleurididae'
  • 'Ivshiniellus is a subjective synonym of Atops'
  • 'Iwayaspis is a subjective synonym of Pseudoyuepingia'
  • 'Iwayaspis asaphoides is recombined as Pseudoyuepingia asaphoides'
  • 'Jakutus belongs to Jakutidae'
  • 'Jangudaspis belongs to Ptychopariidae'
  • 'Jangudaspis princeps belongs to Jangudaspis' according to Ogienko 1956
  • 'Jeffersonia belongs to Bathyuridae'
  • 'Jegorovaia belongs to Alsataspididae'
  • 'Jeholaspis is an objective synonym of Saukioides'
  • 'Jenkinsonia belongs to Alokistocaridae'
  • 'Jessievillia belongs to Elviniidae'
  • 'Jialaopsis belongs to Ptychopariidae'
  • 'Jiangjunshania belongs to Lorenzellidae'
  • 'Jiangnania belongs to Diceratocephalidae'
  • 'Jiangsuaspis belongs to Proasaphiscidae'
  • 'Jiangsucephalus belongs to Proasaphiscidae'
  • 'Jianxilithus is corrected as Janxilithus and belongs to Trinucleidae'
  • 'Jiia belongs to Remopleurididae'
  • 'Jimanomocare belongs to Anomocaridae'
  • 'Jincella belongs to Solenopleuridae'
  • 'Jinghediscus is a subjective synonym of Mallagnostus'
  • 'Jingyangia belongs to Redlichiidae'
  • 'Jiubaspis belongs to Proasaphiscidae'
  • 'Jiumenia belongs to Ptychopariidae'
  • 'Jixianaspis belongs to Wuaniidae'
  • 'Jixianella belongs to Proasaphiscidae'
  • 'Jixiania is replaced by Jixianella' according to Zhang 2001
  • 'Jixiania jixianensis is recombined as Jixianella jixianensis' according to Zhang 2001
  • 'Johntempleia belongs to Encrinuridae'
  • 'Jonotus belongs to Trilobita'
  • 'Josephulus belongs to Pliomeridae'
  • 'Josina is a subjective synonym of Knechtelia'
  • 'Jubileia belongs to Pterocephaliidae'
  • 'Judaiella belongs to Jakutidae'
  • 'Judomia belongs to Judomiidae'
  • 'Jujuyaspis belongs to Olenidae'
  • 'Jujuyops belongs to Calmoniidae'
  • 'Juliaspis belongs to Namanoiidae'
  • 'Junggarella belongs to Cheiruridae'
  • 'Juraspis belongs to Anomocaridae'
  • 'Juriietella belongs to Trilobita'
  • 'Kabuqiia belongs to Solenopleuridae'
  • 'Kadyella belongs to Ellipsocephalidae'
  • 'Kailia belongs to Encrinuridae'
  • 'Kailia (Parakailia) curvata belongs to Kailia (Parakailia)' according to Wu 1979
  • 'Kailia (Parakailia) lata belongs to Kailia (Parakailia)' according to Wu 1979
  • 'Kainella belongs to Remopleurididae'
  • 'Kainisiniella [misspelled as Kainisiliellina] belongs to Asaphidae'
  • 'Kainops belongs to Phacopidae'
  • 'Kaltykelina belongs to Ceratopygidae'
  • 'Kameschkoviella belongs to Ellipsocephalidae'
  • 'Kamlacus is a nomen nudum'
  • 'Kaninia belongs to Asaphiscidae'
  • 'Kaniniella belongs to Asaphiscidae'
  • 'Kanoshia belongs to Pliomeridae'
  • 'Kaolishania belongs to Kaolishaniidae'
  • 'Kaolishaniella belongs to Kaolishaniidae'
  • 'Karagandoides belongs to Solenopleuridae'
  • 'Karginella belongs to Proetidae'
  • 'Kasatchaspis belongs to Crepicephalidae'
  • 'Kaskia belongs to Proetidae'
  • 'Kassinius belongs to Namanoiidae'
  • 'Kathleenella belongs to Ptychaspididae'
  • 'Kathrynia belongs to Harpetidae'
  • 'Kathwaia belongs to Proetidae'
  • 'Kaufmannella belongs to Ceratopygidae'
  • 'Kawina belongs to Cheiruridae'
  • 'Kayseraspis belongs to Asaphidae'
  • 'Kayserops belongs to Acastidae'
  • 'Kazachstania belongs to Dalmanitidae'
  • 'Kazelia belongs to Changshaniidae'
  • 'Kazellina is a subjective synonym of Kazelia'
  • 'Kazellina is a subjective synonym of Kazelia' according to Suvorova and Chernysheva 1960
  • 'Kazellina amsassiensis belongs to Kazellina' according to Sivov 1955
  • 'Kazellina amsassiensis is recombined as Kazelia amsassiensis'
  • 'Keeleaspis belongs to Edelsteinaspididae'
  • 'Kegeliella is a subjective synonym of Gerastos'
  • 'Keithia belongs to Ptychaspididae'
  • 'Keithiella belongs to Ptychaspididae'
  • 'Kendallina belongs to Parabolinoididae'
  • 'Kennacryphaeus belongs to Acastidae'
  • 'Kepingaspis belongs to Redlichiidae'
  • 'Kepisis belongs to Leiostegiidae'
  • 'Kerakephalichas is a subjective synonym of Amphilichas'
  • 'Kerberodiscus is a subjective synonym of Leptochilodiscus'
  • 'Kerbinella is a subjective synonym of Sukhanaspis'
  • 'Kerfornella belongs to Homalonotidae'
  • 'Kettneraspis belongs to Odontopleuridae'
  • 'Ketyna is a subjective synonym of Kujandaspis'
  • 'Khalfinella belongs to Proetidae'
  • 'Kielania belongs to Harpetidae'
  • 'Lowtheria is a subjective synonym of Kielania'
  • 'Kijanella belongs to Ellipsocephalidae'
  • 'Kindbladia belongs to Dokimocephalidae'
  • 'Kinderlania belongs to Holotrachelidae'
  • 'Kingaspis belongs to Ellipsocephalidae'
  • 'Kingaspis (Kingaspidoides) was reranked as Kingaspidoides and belongs to Ellipsocephalidae'
  • 'Kingstonia belongs to Kingstoniidae'
  • 'Kingstoniidae belongs to Ptychopariida'
  • 'Kiowaia belongs to Dokimocephalidae'
  • 'Kirkdomina belongs to Styginidae'
  • 'Kirkella belongs to Asaphidae'
  • 'Kistocare belongs to Alokistocaridae'
  • 'Klabavia belongs to Asaphidae'
  • 'Klotziella belongs to Dolichometopidae'
  • 'Kloucekia belongs to Acastidae'
  • 'Knechtelia belongs to Menomoniidae'
  • 'Kobayashella belongs to Aphelaspididae'
  • 'Kobayashia belongs to Asaphidae'
  • 'Kobayashipeltis belongs to Styginidae'
  • 'Kochaspis belongs to Ptychopariidae'
  • 'Kochiella belongs to Ptychopariidae'
  • 'Kochiellina belongs to Ptychopariidae'
  • 'Kochina belongs to Ptychopariidae'
  • 'Kodymaspis belongs to Nileidae'
  • 'Koenigia is an objective synonym of Homalonotus'
  • 'Kogenium belongs to Ceratopygidae'
  • 'Kokuria belongs to Anomocaridae'
  • 'Kolbaspis belongs to Redlichinidae'
  • 'Kolbinella belongs to Anomocaridae'
  • 'Koldinia belongs to Plethopeltidae'
  • 'Koldiniella belongs to Plethopeltidae'
  • 'Koldinioidia belongs to Shumardiidae'
  • 'Kolihapeltis belongs to Styginidae'
  • 'Kollarcephalus belongs to Proetidae'
  • 'Kolpura is a subjective synonym of Eymekops'
  • 'Kolymella belongs to Cheiruridae'
  • 'Kolymoproetus belongs to Proetidae'
  • 'Kolymoproetus multisegmentatus belongs to Kolymoproetus' according to Maksimova 1978
  • 'Komaspidella belongs to Kingstoniidae'
  • 'Komaspis is a subjective synonym of Irvingella'
  • 'Koneprusia belongs to Odontopleuridae'
  • 'Koneprusites belongs to Tropidocoryphidae'
  • 'Kontrastina belongs to Ordosiidae'
  • 'Kooteniella belongs to Dorypygidae'
  • 'Kooteniellina belongs to Dorypygidae'
  • 'Koptura belongs to Proasaphiscidae'
  • 'Koraipsis belongs to Pilekiidae'
  • 'Kormagnostella is a subjective synonym of Kormagnostus'
  • 'Korobovia belongs to Calodiscidae'
  • 'Kosovopeltis belongs to Styginidae'
  • 'Kotuia belongs to Anomocaridae'
  • 'Kotysopeltis is corrected as Kotisopeltis and belongs to Styginidae'
  • 'Kounamkites is corrected as Kuonamkites and belongs to Ptychopariidae'
  • 'Kozlowskiaspis belongs to Calmoniidae'
  • 'Krattaspis belongs to Cheiruridae'
  • 'Krolina belongs to Ellipsocephalidae'
  • 'Ktenoura belongs to Cheiruridae'
  • 'Kueichowia belongs to Kueichowiidae'
  • 'Kueichowiidae belongs to Redlichiida'
  • 'Kujandaspis belongs to Eulomidae'
  • 'Kujandina belongs to Elviniidae'
  • 'Kuljumbina belongs to Plethopeltidae'
  • 'Kuljumbina kulyumbensis is recombined as Plethopeltoides kulyumbensis'
  • 'Kulmiella belongs to Proetidae'
  • 'Kulyumbopeltis is a subjective synonym of Plethopeltoides'
  • 'Kunshanaspis belongs to Oryctocephalidae'
  • 'Kuraspis belongs to Lonchocephalidae'
  • 'Kuraspoides belongs to Lonchocephalidae'
  • 'Kushanopyge is a subjective synonym of Monkaspis' according to Zhang and Jell 1987
  • 'Kutsingocephalus belongs to Proasaphiscidae'
  • 'Kweichowilla belongs to Shumardiidae'
  • 'Kymagnostus belongs to Agnostidae'
  • 'Kymataspis belongs to Ellipsocephalidae'
  • 'Kyphocephalus belongs to Dokimocephalidae'
  • 'Labiostrella belongs to Pterocephaliidae'
  • 'Labiostria is a subjective synonym of Aphelaspis'
  • 'Labradoria belongs to Edelsteinaspididae'
  • 'Lachnostoma belongs to Asaphidae'
  • 'Lacorsalina belongs to Remopleurididae'
  • 'Lacunoporaspis belongs to Proetidae'
  • 'Ladadiscus is a subjective synonym of Mallagnostus'
  • 'Laethoprusia belongs to Odontopleuridae'
  • 'Lakaspis belongs to Nileidae'
  • 'Laminurus belongs to Ptychopariidae'
  • 'Lamproscutellum belongs to Styginidae'
  • 'Lancastria belongs to Oryctocephalidae'
  • 'Landyia belongs to Pilekiidae'
  • 'Laneites belongs to Cheiruridae'
  • 'Langgonbole belongs to Proetidae'
  • 'Langgonia belongs to Encrinuridae'
  • 'Langyashania belongs to Idahoiidae'
  • 'Lannacus is a subjective synonym of Megalaspides'
  • 'Laoyingshania belongs to Ptychopariidae'
  • 'Lapidaria belongs to Asaphidae'
  • 'Larifugula belongs to Kingstoniidae'
  • 'Lasarchopyge belongs to Scharyiidae'
  • 'Laticephalus belongs to Edelsteinaspididae'
  • 'Latiglobusia belongs to Proetidae'
  • 'Latikingaspis belongs to Ellipsocephalidae'
  • 'Latilorenzella belongs to Wuaniidae'
  • 'Latiproetus belongs to Proetidae'
  • 'Latiredlichia belongs to Redlichiidae'
  • 'Latoucheia belongs to Ellipsocephalidae'
  • 'Latuzella belongs to Ellipsocephalidae'
  • 'Lauzonella belongs to Idahoiidae'
  • 'Lecanoaspis belongs to Cheilocephalidae'
  • 'Lecanopleura belongs to Marjumiidae'
  • 'Lecanopyge belongs to Illaenuridae'
  • 'Lehua belongs to Cheiruridae'
  • 'Leichneyella belongs to Anomocaridae'
  • 'Leimitzia belongs to Hungaiidae'
  • 'Leiobienvillia belongs to Olenidae'
  • 'Leiocoryphe belongs to Plethopeltidae'
  • 'Leioscutellum belongs to Styginidae'
  • 'Leiostegina belongs to Homalonotidae'
  • 'Leiostegium belongs to Leiostegiidae'
  • 'Leiostegium (Euleiostegium) belongs to Leiostegium' according to Zhou and Zhan 1978
  • 'Leiostegium (Euleiostegium) latilimbatum belongs to Leiostegium (Euleiostegium)' according to Zhou and Zhang 1978
  • 'Leiostrototropis belongs to Pliomeridae'
  • 'Leiostrototropis phlegeri belongs to Leiostrototropis' according to Raymond 1937
  • 'Lejopyge calva is a subjective synonym of Lejopyge laevigata' according to Daily and Jago 1975
  • 'Lenacare belongs to Alokistocaridae'
  • 'Lenadiscus belongs to Yukoniidae'
  • 'Lenaspis belongs to Jakutidae'
  • 'Leocephalus belongs to Eurekiidae'
  • 'Leonaspis belongs to Odontopleuridae'
  • 'Lepidoproetus belongs to Tropidocoryphidae'
  • 'Lepidoproetus (Dipharangus) was reranked as Dipharangus and belongs to Tropidocoryphidae'
  • 'Leptopilus belongs to Trilobita'
  • 'Leptoplastides [misspelled as Leptoplastoides] belongs to Olenidae' according to Moore 1959
  • 'Leptoplastides belongs to Olenidae'
  • 'Leptoplastus belongs to Olenidae'
  • 'Lermontovia belongs to Ellipsocephalidae'
  • 'Lermontoviella belongs to Antagmidae'
  • 'Leurostega belongs to Olenidae'
  • 'Levisaspis belongs to Norwoodiidae'
  • 'Levisella belongs to Idahoiidae'
  • 'Levisia belongs to Solenopleuridae'
  • 'Liangshanaspis is a subjective synonym of Platycoryphe'
  • 'Liangshanocephalus belongs to Isocolidae'
  • 'Liaoningaspis belongs to Monkaspididae'
  • 'Liaoningella belongs to Monkaspididae'
  • 'Liaotropis belongs to Kaolishaniidae'
  • 'Liaotropis tropis belongs to Liaotropis' according to Schrank 1975
  • 'Liaoyangaspis is a subjective synonym of Lioparia'
  • 'Lichakephalus belongs to Lichakephalidae'
  • 'Lichapyge is a subjective synonym of Macropyge'
  • 'Lichas belongs to Lichidae'
  • 'Lichas (Ceratarges) was reranked as Ceratarges and belongs to Lichidae'
  • 'Lichas (Conolichas) was reranked as Conolichas and belongs to Lichidae'
  • 'Lichas (Echinolichas) was reranked as Echinolichas and belongs to Lichidae'
  • 'Euarges is a subjective synonym of Acanthopyge'
  • 'Lichas (Euarges) mephisto is recombined as Mephiarges mephisto'
  • 'Lichas (Hoplolichas) was reranked as Hoplolichas and belongs to Lichidae'
  • 'Lichas (Metopolichas) was reranked as Metopolichas and belongs to Lichidae'
  • 'Oncholichas is an objective synonym of Arctinurus'
  • 'Platopolichas is a subjective synonym of Uralichas'
  • 'Lichas (Platylichas) was reranked as Platylichas and belongs to Lichidae'
  • 'Plusiarges is a subjective synonym of Trochurus'
  • 'Pterolichas is an objective synonym of Arctinurus'
  • 'Lichas (Uralichas) was reranked as Uralichas and belongs to Lichidae'
  • 'Lichas branikensis is recombined as Lobopyge branikensis'
  • 'Lichengia belongs to Saukiidae'
  • 'Licnocephala belongs to Bathyuridae'
  • 'Liexiaspis belongs to Pliomeridae'
  • 'Liexiaspis zhengjiaensis belongs to Liexiaspis' according to Liu 1982
  • 'Ligiscus belongs to Styginidae'
  • 'Limataceps belongs to Ellipsocephalidae'
  • 'Limbadiscus is a subjective synonym of Natalina'
  • 'Limpeina belongs to Eulomidae'
  • 'Linguagnostus belongs to Diplagnostidae'
  • 'Linguaphillipsia belongs to Proetidae'
  • 'Linguaproetus belongs to Tropidocoryphidae'
  • 'Linguchuangia belongs to Leiostegiidae'
  • 'Lingukainella belongs to Remopleurididae'
  • 'Linguocalymene belongs to Calymenidae'
  • 'Liobole (Panibole) was reranked as Panibole and belongs to Proetidae'
  • 'Liobolina belongs to Proetidae'
  • 'Liocalymene belongs to Calymenidae'
  • 'Liocare belongs to Anomocarellidae'
  • 'Liocnemis belongs to Pterygometopidae'
  • 'Lioharpes belongs to Harpetidae'
  • 'Liokootenia belongs to Dorypygidae'
  • 'Liolophops belongs to Phacopidae'
  • 'Liomegalaspides belongs to Asaphidae'
  • 'Lioparella belongs to Proasaphiscidae'
  • 'Liopeishania belongs to Anomocarellidae'
  • 'Liopelta belongs to Anomocarellidae'
  • 'Liosolenopleura belongs to Solenopleuridae'
  • 'Liostracina belongs to Liostracinidae'
  • 'Liostracinoides is a subjective synonym of Phylacterus'
  • 'Liostracinoides is a subjective synonym of Phylacterus' according to Westrop 1989
  • 'Liostracus is replaced by Andrarina'
  • 'Liparges is an objective synonym of Dicranogmus'
  • 'Liriamnica belongs to Shumardiidae'
  • 'Lisania belongs to Lisaniidae'
  • 'Lisaniella is a subjective synonym of Redlichaspis'
  • 'Lisogoragnostus belongs to Peronopsidae'
  • 'Lisogorites belongs to Asaphidae'
  • 'Listroa belongs to Aphelaspididae'
  • 'Litagnostus is a subjective synonym of Pseudagnostus'
  • 'Litaspis belongs to Edelsteinaspididae'
  • 'Litavkaspis belongs to Agraulidae'
  • 'Litocephalus belongs to Aphelaspididae'
  • 'Litometopus belongs to Weymouthiidae'
  • 'Liuheaspis belongs to Damesellidae'
  • 'Liwia belongs to Nektaspida'
  • 'Llandovacaste belongs to Acastidae'
  • 'Llanoaspidella belongs to Llanoaspididae'
  • 'Llanoaspididae belongs to Ptychopariida'
  • 'Llanoaspis belongs to Llanoaspididae'
  • 'Lloydia belongs to Leiostegiidae'
  • 'Lloydolithus belongs to Trinucleidae'
  • 'Lobocephalina is a subjective synonym of Conokephalina'
  • 'Lobopyge belongs to Lichidae'
  • 'Nitidulopyge is a subjective synonym of Perunaspis'
  • 'Lochkovella belongs to Phacopidae'
  • 'Lochmanaspis belongs to Eurekiidae'
  • 'Lodenicia belongs to Tropidocoryphidae'
  • 'Loeipyge belongs to Brachymetopidae'
  • 'Loganellus belongs to Idahoiidae'
  • 'Loganopeltis belongs to Harpididae'
  • 'Loganopeltoides belongs to Harpididae'
  • 'Lohanpopsis belongs to Remopleurididae'
  • 'Lomsucaspis belongs to Anomocaridae'
  • 'Lonchocephalidae belongs to Ptychopariida'
  • 'Lonchocephalus belongs to Lonchocephalidae'
  • 'Lonchodomas belongs to Raphiophoridae'
  • 'Longduia belongs to Yinitidae'
  • 'Longianda belongs to Saukiandidae'
  • 'Longiproetus belongs to Proetidae'
  • 'Longxumenia belongs to Anomocaridae'
  • 'Loparella belongs to Eulomidae'
  • 'Lopeuloma belongs to Eulomidae'
  • 'Lophiokephalion belongs to Proetidae'
  • 'Lophoholcus belongs to Saukiidae'
  • 'Lophosaukia belongs to Saukiidae'
  • 'Lordshillia belongs to Trinucleidae'
  • 'Lorenzella belongs to Lorenzellidae'
  • 'Loshanella belongs to Remopleurididae'
  • 'Loxonepea belongs to Nepeidae'
  • 'Loxopeltis belongs to Trilobita'
  • 'Luaspis belongs to Yunnanocephalidae'
  • 'Lugalella belongs to Proetidae'
  • 'Luia belongs to Anomocarellidae'
  • 'Lunacephalus belongs to Pterocephaliidae'
  • 'Lunolenus belongs to Abadiellidae'
  • 'Luojiashania belongs to Proetidae'
  • 'Luonanocephalus belongs to Proasaphiscidae'
  • 'Luotuolingia belongs to Pterocephaliidae'
  • 'Lusampa belongs to Trilobita'
  • 'Lusatiops belongs to Ellipsocephalidae'
  • 'Luvsanodiscus belongs to Hebediscidae'
  • 'Luvsanodiscus [misspelled as Lavsanodiscus] belongs to Agnostida' according to Sepkoski 2002
  • 'Luvsanodiscus gammatus belongs to Luvsanodiscus' according to Korobov 1980
  • 'Luxella belongs to Ptychopariidae'
  • 'Luyanhaoaspis belongs to Asaphiscidae'
  • 'Luyanhaoia belongs to Asaphiscidae'
  • 'Lycophron belongs to Asaphidae'
  • 'Lydiaspis belongs to Anomocarellidae'
  • 'Lygdozoon belongs to Dalmanitidae'
  • 'Lynaspis belongs to Liostracinidae'
  • 'Lyralichas belongs to Lichidae'
  • 'Lyrapyge belongs to Encrinuridae'
  • 'Lyriaspis belongs to Ptychopariidae'
  • 'Macelloura belongs to Cheilocephalidae'
  • 'Machairagnostus belongs to Diplagnostidae'
  • 'Mackenziurus belongs to Encrinuridae'
  • 'Macrogrammus belongs to Pilekiidae'
  • 'Macronoda belongs to Ptychaspididae'
  • 'Macropyge belongs to Ceratopygidae'
  • 'Macropygella belongs to Ceratopygidae'
  • 'Macroterolichas is a subjective synonym of Metopolichas'
  • 'Macrotoxus belongs to Anomocaridae'
  • 'Madaraspis belongs to Bathyuridae'
  • 'Madarocephalus belongs to Catillicephalidae'
  • 'Maduiya belongs to Aphelaspididae'
  • 'Madygenia belongs to Rorringtoniidae'
  • 'Magnacephalus belongs to Eurekiidae'
  • 'Magnomma belongs to Olenidae'
  • 'Mahaiella belongs to Proetidae'
  • 'Maiaspis belongs to Solenopleuridae'
  • 'Majiangia is a subjective synonym of Meitania'
  • 'Maladia belongs to Eurekiidae'
  • 'Maladioidella belongs to Idahoiidae'
  • 'Malimanaspis belongs to Aulacopleuridae'
  • 'Malinaspis belongs to Raphiophoridae'
  • 'Malladaia belongs to Dalmanitidae'
  • 'Malongullia belongs to Raphiophoridae'
  • 'Malungia is a subjective synonym of Dolerolenus'
  • 'Malungia laevigata is recombined as Dolerolenus laevigata'
  • 'Malvinella belongs to Calmoniidae'
  • 'Malykania belongs to Jakutidae'
  • 'Manchurocephalus is a subjective synonym of Paracoosia'
  • 'Mannopyge belongs to Proetidae'
  • 'Mannschreekia is a subjective synonym of Theodenisia'
  • 'Mansiella belongs to Acrocephalitidae'
  • 'Mansuyella belongs to Ceratopygidae'
  • 'Mansuyia belongs to Kaolishaniidae'
  • 'Manublesia belongs to Solenopleuridae'
  • 'Maotunia belongs to Proasaphiscidae'
  • 'Mapania belongs to Mapaniidae'
  • 'Mapanopsis belongs to Mapaniidae'
  • 'Marekolithus belongs to Trinucleidae'
  • 'Maritimella is a nomen nudum'
  • 'Marjumia belongs to Marjumiidae'
  • 'Marjumiidae belongs to Ptychopariida'
  • 'Marrolithoides belongs to Trinucleidae'
  • 'Marrolithus belongs to Trinucleidae'
  • 'Marsaisia is a subjective synonym of Richterops'
  • 'Maryvillia belongs to Kingstoniidae'
  • 'Maspakites belongs to Conokephalinidae'
  • 'Maspakites occidentalis belongs to Maspakites' according to Lazarenko and Nikiforov 1968
  • 'Matania belongs to Catillicephalidae'
  • 'Mataninella belongs to Solenopleuridae'
  • 'Maurotarion belongs to Aulacopleuridae'
  • 'Maustonia is a subjective synonym of Taenicephalus'
  • 'Mayiella belongs to Mayiellidae'
  • 'Mayopyge is a subjective synonym of Parasphaerexochus'
  • 'Mayopyge zapata is recombined as Parasphaerexochus zapata'
  • 'Mcnairia is a subjective synonym of Parehmania'
  • 'Meadowtownella belongs to Odontopleuridae'
  • 'Mecophrys [misspelled as Mecophyrs] belongs to Changshaniidae'
  • 'Meeria is a subjective synonym of Idahoia'
  • 'Megadunderbergia belongs to Elviniidae'
  • 'Megagnostus belongs to Agnostina'
  • 'Megagraulos belongs to Wuaniidae'
  • 'Megalaspidella is a subjective synonym of Asaphellus'
  • 'Megalaspides belongs to Asaphidae'
  • 'Megalaspidicus is a nomen nudum'
  • 'Megalaspis is replaced by Megistaspis'
  • 'Plesiomegalaspis is a subjective synonym of Asaphellus'
  • 'Megalisania belongs to Lisaniidae'
  • 'Megalopsis belongs to Anomocarellidae'
  • 'Megapalaeolenus belongs to Palaeolenidae'
  • 'Megistaspis belongs to Asaphidae'
  • 'Megistaspis (Ekeraspis) was reranked as Ekeraspis and belongs to Asaphidae'
  • 'Megistaspis (Megistaspidella) was reranked as Megistaspidella and belongs to Asaphidae'
  • 'Varvaspis is an objective synonym of Paramegistaspis'
  • 'Meisterella belongs to Conokephalinidae'
  • 'Meitanella belongs to Yinitidae'
  • 'Meitania belongs to Ptychopariidae'
  • 'Meitania (Promeitania) was reranked as Promeitania and belongs to Ptychopariidae'
  • 'Meitanillaenus belongs to Styginidae'
  • 'Mekynophrys is a subjective synonym of Basilicus'
  • 'Memmatella belongs to Proasaphiscidae'
  • 'Mendolaspis belongs to Raphiophoridae'
  • 'Mendoparabolina is a subjective synonym of Bienvillia'
  • 'Mendosina belongs to Remopleurididae'
  • 'Mendospidella belongs to Dolichometopidae'
  • 'Meneghinella belongs to Trilobita'
  • 'Menevia is replaced by Meneviella'
  • 'Meneviella belongs to Holocephalinidae'
  • 'Meniscocoryphe belongs to Plethopeltidae'
  • 'Meniscuchus belongs to Weymouthiidae'
  • 'Menneraspidae is corrected as Menneraspididae and belongs to Redlichiida'
  • 'Menocephalites belongs to Solenopleuridae'
  • 'Menomonia belongs to Menomoniidae'
  • 'Menoparia belongs to Remopleurididae'
  • 'Menorcaspis belongs to Proetidae'
  • 'Meringaspis is a subjective synonym of Damesops'
  • 'Merlinia belongs to Asaphidae'
  • 'Meropalla belongs to Leiostegiidae'
  • 'Meroperix belongs to Styginidae'
  • 'Mesagnostus is an objective synonym of Peronopsis'
  • 'Mesetaia is a subjective synonym of Kingaspis'
  • 'Mesotaphraspis belongs to Toernquistiidae'
  • 'Metaacidaspis belongs to Lichakephalidae'
  • 'Metabalangia belongs to Oryctocephalidae'
  • 'Metabowmania is a subjective synonym of Hillyardina'
  • 'Metacalymene belongs to Calymenidae'
  • 'Metacanthina belongs to Acastidae'
  • 'Metachangshania is a subjective synonym of Changshania'
  • 'Metacryphaeus belongs to Calmoniidae'
  • 'Metadoxides belongs to Metadoxididae'
  • 'Metadoxididae belongs to Redlichiida'
  • 'Metagnostidae belongs to Agnostida'
  • 'Metakootenia belongs to Dorypygidae'
  • 'Metalisania belongs to Lisaniidae'
  • 'Metanomocare belongs to Anomocaridae'
  • 'Metaphillipsia belongs to Proetidae'
  • 'Metapilekia belongs to Pilekiidae'
  • 'Metapliomerops belongs to Pilekiidae'
  • 'Metaptychopyge belongs to Asaphidae'
  • 'Metaredlichia belongs to Redlichiidae'
  • 'Metaredlichioides is a subjective synonym of Ushbaspis' according to Zhang 1997
  • 'Metascutellum belongs to Styginidae'
  • 'Metayuepingia belongs to Asaphidae'
  • 'Meteoraspis belongs to Tricrepicephalidae'
  • 'Metisaspina belongs to Elviniidae'
  • 'Metisaspis belongs to Llanoaspididae'
  • 'Metopias is replaced by Metopolichas'
  • 'Metopotropis belongs to Auritamidae'
  • 'Mexicaspis belongs to Zacanthoididae'
  • 'Mexicella belongs to Ptychopariidae'
  • 'Mezocrotalus is a subjective synonym of Crotalocephalina'
  • 'Miagnostus is an objective synonym of Lejopyge'
  • 'Mianxiandiscus is a subjective synonym of Tsunyidiscus'
  • 'Miaobanpoia belongs to Proasaphiscidae'
  • 'Miaopopsis belongs to Raphiophoridae'
  • 'Micagnostus belongs to Peronopsidae'
  • 'Michaspis is a subjective synonym of Iranoleesia'
  • 'Micmacca belongs to Chengkouiidae'
  • 'Micmaccopsis belongs to Zacanthoididae'
  • 'Microdiscus is a nomen vanum'
  • 'Microparia belongs to Cyclopygidae'
  • 'Microparia (Paramicroparia) was reranked as Paramicroparia and belongs to Cyclopygidae'
  • 'Microparia (Paramicroparia) acuta is recombined as Paramicroparia acuta'
  • 'Microryctocara belongs to Oryctocephalidae'
  • 'Microscutellum belongs to Styginidae'
  • 'Microspatulina belongs to Proetidae'
  • 'Mictosaukia belongs to Saukiidae'
  • 'Milaspis belongs to Corynexochidae'
  • 'Mimocryphaeus belongs to Acastidae'
  • 'Mindycrusta belongs to Asaphiscidae'
  • 'Minicephalus belongs to Illaenuridae'
  • 'Minkella belongs to Parabolinoididae'
  • 'Minupeltis belongs to Solenopleuridae'
  • 'Minupeltis definita belongs to Minupeltis'
  • 'Minusella is a misspelling of Minusinella'
  • 'Minusinella belongs to Metadoxididae'
  • 'Mioptychopyge belongs to Asaphidae'
  • 'Mirabole belongs to Proetidae'
  • 'Miraculaspis belongs to Condylopygidae'
  • 'Miracybele is a subjective synonym of Cybelurus'
  • 'Miranda belongs to Conokephalinidae'
  • 'Miranella belongs to Corynexochidae'
  • 'Miraspis belongs to Odontopleuridae'
  • 'Miriproetus belongs to Tropidocoryphidae'
  • 'Missisquoia is a subjective synonym of Parakoldinioidia'
  • 'Missisquoiidae belongs to Trilobita'
  • 'Mitchellaspis is a subjective synonym of Batocara'
  • 'Mitchellia is replaced by Mitchellaspis' according to Henningsmoen 1959
  • 'Modellops is a subjective synonym of Hollardops'
  • 'Modocia belongs to Marjumiidae'
  • 'Modocia berkeyi is recombined as Camaraspoides berkeyi' according to Fredrickson 1949
  • 'Modocia berkeyi is recombined as Camaraspis berkeyi' according to Grant 1965
  • 'Modocia berkeyi is recombined as Camaraspis berkeyi'
  • 'Monexagnostus is a subjective synonym of Peratagnostus'
  • 'Mongolodiscus is a subjective synonym of Egyngolia'
  • 'Mongolodiscus zaicevi is recombined as Egyngolia zaicevi'
  • 'Monocheilus belongs to Dikelocephalidae'
  • 'Monorakos belongs to Pterygometopidae'
  • 'Monosulcatina belongs to Lonchocephalidae'
  • 'Moravocoryphe belongs to Proetidae'
  • 'Moretaeva belongs to Trilobita' according to Hupé 1960
  • 'Morgatia belongs to Dalmanitidae'
  • 'Morocconites belongs to Acastidae'
  • 'Morosa belongs to Pterocephaliidae'
  • 'Morosa brevispina belongs to Morosa'
  • 'Morosa extensa belongs to Morosa'
  • 'Moschoglossis belongs to Proetidae'
  • 'Moxomia belongs to Olenidae'
  • 'Mucronaspis belongs to Dalmanitidae'
  • 'Mulciberaspis belongs to Styginidae'
  • 'Mundocephalina belongs to Estaingiidae'
  • 'Munija belongs to Solenopleuridae'
  • 'Munijia belongs to Solenopleuridae'
  • 'Murphycops is a subjective synonym of Acernaspis'
  • 'Myinda belongs to Trinucleidae'
  • 'Myindella belongs to Trinucleidae'
  • 'Myoproetus is an objective synonym of Myoproetus'
  • 'Myoproetus belongs to Proetidae'
  • 'Myopsolenus belongs to Ellipsocephalidae'
  • 'Mystrocephala belongs to Brachymetopidae'
  • 'Mytocephala was reranked as Zeliszkella (Mytocephala) and belongs to Zeliszkella' according to Struve 1958
  • 'Mytocephala belongs to Dalmanitidae'
  • 'Myttonia belongs to Trinucleidae'
  • 'Nadiyella belongs to Anomocaridae'
  • 'Nagaproetus belongs to Tropidocoryphidae'
  • 'Nahannia belongs to Asaphidae'
  • 'Nahannicephalus belongs to Llanoaspididae'
  • 'Namanoia belongs to Namanoiidae'
  • 'Namanoiidae belongs to Trilobita'
  • 'Nambeetella belongs to Raphiophoridae'
  • 'Namuropyge (Coignops) belongs to Namuropyge' according to Gandl 1980
  • 'Namuropyge (Coignops) was reranked as Coignops and belongs to Aulacopleuridae'
  • 'Namuropyge (Coignops) martinezi belongs to Namuropyge (Coignops)' according to Gandl 1980
  • 'Nangaoia belongs to Ptychopariidae'
  • 'Nangaoia (Gedongaspis) was reranked as Gedongaspis and belongs to Ptychopariidae'
  • 'Nangaoia (Gedongaspis) granulosa is recombined as Gedongaspis granulosa'
  • 'Nangaoia (Gedongaspis) oblonga is recombined as Gedongaspis oblonga'
  • 'Nangaops belongs to Ptychopariidae'
  • 'Nanillaenus belongs to Illaenidae'
  • 'Nankinolithus belongs to Trinucleidae'
  • 'Nanlingia is a subjective synonym of Girvanopyge'
  • 'Nannopeltis belongs to Ceratopygidae'
  • 'Nanshanaspis belongs to Raphiophoridae'
  • 'Naraoia belongs to Nektaspida'
  • 'Nasocephalus belongs to Marjumiidae'
  • 'Nassovia belongs to Ptychopariidae'
  • 'Natmus belongs to Eulomidae'
  • 'Naustia belongs to Remopleurididae'
  • 'Nebidella is a subjective synonym of Conoredlichia'
  • 'Nehanniaspis belongs to Edelsteinaspididae'
  • 'Nelegeria belongs to Ellipsocephalidae'
  • 'Nelsonia belongs to Ptychopariidae'
  • 'Neltneria belongs to Neltneriidae'
  • 'Neoacrocephalites belongs to Solenopleuridae'
  • 'Neoagnostus is a subjective synonym of Pseudorhaptagnostus'
  • 'Neoanomocarella belongs to Anomocarellidae'
  • 'Neochilonorria belongs to Trilobita'
  • 'Neoglaphyraspis belongs to Lonchocephalidae'
  • 'Neohedinaspis belongs to Ceratopygidae'
  • 'Neolenus belongs to Olenidae'
  • 'Neolichas belongs to Lichidae'
  • 'Neometacanthus belongs to Acastidae'
  • 'Neopeltis belongs to Asaphidae'
  • 'Neopoliellina belongs to Dolichometopidae'
  • 'Neoprobolium belongs to Dalmanitidae'
  • 'Paraproetus is replaced by Siciliproetus'
  • 'Siciliproetus is a subjective synonym of Neogriffithides'
  • 'Neoproetus (Triproetus) was reranked as Triproetus and belongs to Proetidae'
  • 'Neopsilocephalina belongs to Nileidae'
  • 'Neoredlichia belongs to Redlichiidae'
  • 'Neoshirakiella belongs to Shirakiellidae'
  • 'Neosolenopleurella belongs to Solenopleuridae'
  • 'Neosynphoria is an objective synonym of Synphoria'
  • 'Neotaenicephalus belongs to Trilobita'
  • 'Nepea belongs to Nepeidae'
  • 'Nepeidae belongs to Ptychopariida'
  • 'Nephranops belongs to Phacopidae'
  • 'Neptunagnostella is a subjective synonym of Geragnostus'
  • 'Nericiaspis belongs to Olenidae'
  • 'Nerudaspis belongs to Asaphidae'
  • 'Neseuretus belongs to Calymenidae'
  • 'Nevadia belongs to Nevadiidae'
  • 'Nganasanella belongs to Aphelaspididae'
  • 'Nieszkowskia belongs to Cheiruridae'
  • 'Nilegna belongs to Solenopleuridae'
  • 'Nileoides belongs to Asaphidae'
  • 'Nileus belongs to Nileidae'
  • 'Ninadiscus belongs to Weymouthiidae'
  • 'Ninaspis belongs to Solenopleuridae'
  • 'Ningkianites belongs to Asaphidae'
  • 'Ningkianites ningkianensis belongs to Ningkianites' according to Lu 1975
  • 'Ningkianolithus belongs to Trinucleidae'
  • 'Niobe belongs to Asaphidae'
  • 'Niobella belongs to Asaphidae'
  • 'Niobides belongs to Asaphidae'
  • 'Niobina belongs to Asaphidae'
  • 'Nipponarges belongs to Lichidae'
  • 'Nipponocalymene belongs to Calymenidae'
  • 'Nitidocare belongs to Proetidae'
  • 'Niuchangella belongs to Scharyiidae'
  • 'Nixonella is a subjective synonym of Genevievella'
  • 'Nobiliasaphus belongs to Asaphidae'
  • 'Nodiceps belongs to Edelsteinaspididae'
  • 'Noelaspis belongs to Idahoiidae'
  • 'Nomadinis belongs to Monkaspididae'
  • 'Nonix is a subjective synonym of Dicranopeltis'
  • 'Norasaphus belongs to Asaphidae'
  • 'Nordia belongs to Lonchocephalidae'
  • 'Norinia belongs to Asaphidae'
  • 'Norwoodella belongs to Norwoodiidae'
  • 'Norwoodia belongs to Norwoodiidae'
  • 'Notaiella belongs to Plethopeltidae'
  • 'Notasaphus is a subjective synonym of Kootenia'
  • 'Notoaphelaspis belongs to Aphelaspididae'
  • 'Notopeltis belongs to Asaphidae'
  • 'Novakella belongs to Cyclopygidae'
  • 'Novaspis belongs to Trinucleidae'
  • 'Novoameura belongs to Proetidae'
  • 'Nucleurus belongs to Encrinuridae'
  • 'Nunnaspis belongs to Proetidae'
  • 'Nyaya belongs to Hystricuridae'
  • 'Nyella belongs to Ptychopariidae'
  • 'Obliteraspis belongs to Pliomeridae'
  • 'Obrucheviaspis belongs to Dokimocephalidae'
  • 'Octillaenus belongs to Illaenidae'
  • 'Octobronteus belongs to Styginidae'
  • 'Oculeus belongs to Remopleurididae'
  • 'Oculichasmops belongs to Pterygometopidae'
  • 'Oculomagnus is a subjective synonym of Benthamaspis'
  • 'Odontocephalus belongs to Dalmanitidae'
  • 'Odontochile belongs to Dalmanitidae'
  • 'Odontochile (Erbenochile) was reranked as Erbenochile and belongs to Acastidae'
  • 'Oedicybele belongs to Encrinuridae'
  • 'Oehlertia is replaced by Oehlertaspis'
  • 'Ogmasaphus belongs to Asaphidae'
  • 'Ogmocnemis is a subjective synonym of Decoroproetus'
  • 'Ogyginus belongs to Asaphidae'
  • 'Ogygiocarella belongs to Asaphidae'
  • 'Ogygiocaris belongs to Asaphidae'
  • 'Ogygites belongs to Asaphidae'
  • 'Ogygitoides belongs to Asaphidae'
  • 'Ogygopsis belongs to Dorypygidae'
  • 'Oidalaproetus belongs to Proetidae'
  • 'Oinochoe belongs to Lichidae'
  • 'Olegaspis belongs to Lonchocephalidae'
  • 'Olekmaspis belongs to Ellipsocephalidae'
  • 'Olenaspella belongs to Aphelaspididae'
  • 'Olenekella belongs to Illaenuridae'
  • 'Olenekina belongs to Ptychopariidae'
  • 'Olenoides belongs to Dorypygidae'
  • 'Olenopsis is replaced by Dolerolenus'
  • 'Olentella belongs to Aphelaspididae'
  • 'Olenus belongs to Olenidae'
  • 'Olenus salteri is recombined as Leptoplastides salteri'
  • 'Olenus salteri is recombined as Leptoplastoides salteri' according to Chatterton 1996
  • 'Oleorthis porosa belongs to Oleorthis' according to Havlicek 1968
  • 'Olgaspis belongs to Redlichiidae'
  • 'Oligometopus belongs to Cheilocephalidae'
  • 'Omeipsis belongs to Taihungshaniidae'
  • 'Ommokris is a subjective synonym of Dalmanites'
  • 'Ompheter is a subjective synonym of Opipeuter'
  • 'Onaraspis belongs to Metadoxididae'
  • 'Onchocephalina belongs to Antagmidae'
  • 'Onchocephalites belongs to Ptychopariidae'
  • 'Onchocephalus belongs to Antagmidae'
  • 'Onchometopus belongs to Asaphidae'
  • 'Onchonotellus belongs to Catillicephalidae'
  • 'Onchonotina is a subjective synonym of Onchonotellus'
  • 'Onchonotopsis belongs to Catillicephalidae'
  • 'Onchonotus belongs to Catillicephalidae'
  • 'Onchopeltis belongs to Elviniidae'
  • 'Onnia belongs to Trinucleidae'
  • 'Onychopyge belongs to Ceratopygidae'
  • 'Onycopyge belongs to Cheiruridae'
  • 'Agnostonymus is a subjective synonym of Onymagnostus'
  • 'Oodiscus belongs to Weymouthiidae'
  • 'Oopsites belongs to Telephinidae'
  • 'Oosthuizenella belongs to Calmoniidae'
  • 'Opipeuter belongs to Telephinidae'
  • 'Opoa belongs to Styginidae'
  • 'Opsimasaphus is a subjective synonym of Birmanites'
  • 'Opsimasaphus jaanussoni is recombined as Birmanites jaanussoni'
  • 'Opsiosoryctocephalus belongs to Oryctocephalidae'
  • 'Opsypharus is a subjective synonym of Failleana'
  • 'Orbitoproetus belongs to Proetidae'
  • 'Ordosia belongs to Ordosiidae'
  • 'Oreisator is a subjective synonym of Erzishania'
  • 'Orienturus belongs to Ptychopariidae'
  • 'Orlovia belongs to Ptychopariidae'
  • 'Orloviella belongs to Ptychopariidae'
  • 'Ormathops belongs to Dalmanitidae'
  • 'Ormistonia belongs to Proetidae'
  • 'Ormistoniella belongs to Proetidae'
  • 'Orometopus belongs to Alsataspididae'
  • 'Orphanaspis belongs to Odontopleuridae'
  • 'Orria is a subjective synonym of Bathyuriscus'
  • 'Orriella is a subjective synonym of Bathyuriscus'
  • 'Orthodorsum belongs to Anomocarellidae'
  • 'Oryctocara belongs to Oryctocephalidae'
  • 'Oryctocare belongs to Oryctocephalidae'
  • 'Oryctocephalina belongs to Oryctocephalidae'
  • 'Oryctocephalites belongs to Oryctocephalidae'
  • 'Oryctocephaloides belongs to Oryctocephalidae'
  • 'Oryctocephalops belongs to Oryctocephalidae'
  • 'Oryctocephalus belongs to Oryctocephalidae'
  • 'Orygmaspis belongs to Parabolinoididae'
  • 'Osceolia belongs to Dikelocephalidae'
  • 'Osekaspis belongs to Cheiruridae'
  • 'Osmolskia belongs to Proetidae'
  • 'Tricornotarion is a subjective synonym of Maurotarion'
  • 'Otarion elegans belongs to Otarion' according to Munster 1842
  • 'Otarion elegans is recombined as Skemmatocare elegans' according to Richter and Richter 1927
  • 'Otarionella is a subjective synonym of Otarion'
  • 'Otarozoum belongs to Lichidae'
  • 'Ottenbyaspis belongs to Panderiidae'
  • 'Ouijjania belongs to Bigotinidae'
  • 'Ourikaia belongs to Ellipsocephalidae'
  • 'Ovalocephalus belongs to Pliomeridae'
  • 'Ovatoryctocara is a subjective synonym of Arthricocephalus'
  • 'Oxyagnostus is a subjective synonym of Acmarhachis'
  • 'Oxygonaspis is a subjective synonym of Pingquania'
  • 'Pachyaspis belongs to Ptychopariidae'
  • 'Danzhaina is a subjective synonym of Xingrenaspis'
  • 'Pacificurus is a subjective synonym of Batocara'
  • 'Paciphacops belongs to Phacopidae'
  • 'Paedeumias belongs to Olenellidae'
  • 'Paedeumias transitans belongs to Paedeumias'
  • 'Paenebeltella belongs to Hystricuridae'
  • 'Pagetia belongs to Eodiscidae'
  • 'Pagetia (Sinopagetia) was reranked as Sinopagetia and belongs to Eodiscidae'
  • 'Pagetia (Sinopagetia) huainanensis is recombined as Sinopagetia huainanensis'
  • 'Pagetia (Sinopagetia) neimengguensis is recombined as Sinopagetia neimengguensis'
  • 'Pagetiellus is a subjective synonym of Delgadella'
  • 'Pagodia belongs to Pagodiidae'
  • 'Pagodia (Lotosoides) was reranked as Lotosoides and belongs to Pagodiidae'
  • 'Pagometopus belongs to Alsataspididae'
  • 'Paivinia belongs to Pharostomatidae'
  • 'Paladin belongs to Proetidae'
  • 'Palaeadotes is a subjective synonym of Bergeronites'
  • 'Palaeoharpes belongs to Harpetidae'
  • 'Palaeolenella belongs to Palaeolenidae'
  • 'Palaeolenidae belongs to Ptychopariida'
  • 'Palaeolenides belongs to Palaeolenidae'
  • 'Palaeolenus belongs to Palaeolenidae'
  • 'Palaeophillipsia belongs to Proetidae'
  • 'Palella belongs to Anomocaridae'
  • 'Palaeocrepicephalus is an objective synonym of Kochaspis'
  • 'Paleofossus belongs to Edelsteinaspididae'
  • 'Paleooryctocephalus belongs to Oryctocephalidae'
  • 'Palmerara belongs to Trilobita' according to Novack-Gottshall 2003
  • 'Palmeraspis belongs to Ptychopariidae'
  • 'Palpebralia was reranked as Drevermannia (Palpebralia) and belongs to Drevermannia' according to Richter and Richter 1943
  • 'Palpebralia (Pontipalpebralia) was reranked as Pontipalpebralia and belongs to Proetidae'
  • 'Palpebralia (Pontipalpebralia) belongs to Palpebralia' according to Lutke 1968
  • 'Palpebralia (Pontipalpebralia) pontifera belongs to Palpebralia (Pontipalpebralia)' according to Lütke 1968
  • 'Palquiella belongs to Alsataspididae'
  • 'Pamirotellus is a subjective synonym of Brongniartella'
  • 'Panacus belongs to Ptychopariidae'
  • 'Panarchaegonus belongs to Scharyiidae'
  • 'Panarchaeogonus belongs to Scharyiidae'
  • 'Pandaspinapyga belongs to Cheiruridae'
  • 'Panderia belongs to Panderiidae'
  • 'Panderiidae belongs to Corynexochida'
  • 'Panxinella belongs to Zacanthoididae'
  • 'Paokannia belongs to Yinitidae'
  • 'Papillicalymene belongs to Calymenidae'
  • 'Papyriaspis belongs to Papyriaspididae'
  • 'Paraacidaspis belongs to Lichakephalidae'
  • 'Paraantagmus belongs to Antagmidae'
  • 'Paraantagmus (Balangcunaspis) was reranked as Balangcunaspis and belongs to Ptychopariidae'
  • 'Paraantagmus (Balangcunaspis) subcylindricus is recombined as Balangcunaspis subcylindricus'
  • 'Paraantagmus (Balangcunaspis) transversus is recombined as Balangcunaspis transversus'
  • 'Parabailiella belongs to Conocoryphidae'
  • 'Parabarrandia belongs to Nileidae'
  • 'Parabasilicus is a subjective synonym of Basilicus'
  • 'Parabathycheilus is a subjective synonym of Bathycheilus'
  • 'Parabellefontia belongs to Asaphidae'
  • 'Parablackwelderia is a subjective synonym of Blackwelderia'
  • 'Parabolina belongs to Olenidae'
  • 'Parabolinella belongs to Olenidae'
  • 'Parabolinoides belongs to Parabolinoididae'
  • 'Parabolinoididae belongs to Asaphida'
  • 'Parabolinopsis is a subjective synonym of Leptoplastides'
  • 'Parabouleia belongs to Calmoniidae'
  • 'Parabriscoia is a subjective synonym of Briscoia'
  • 'Parabumasttides is a misspelling of Parabumastides'
  • 'Parabumastides dayongensis belongs to Parabumastides' according to Ji 1987
  • 'Paracalmonia belongs to Calmoniidae'
  • 'Paracedaria belongs to Llanoaspididae'
  • 'Paraceraurus belongs to Cheiruridae'
  • 'Parachangshania belongs to Changshaniidae'
  • 'Parachaunoproetus belongs to Proetidae'
  • 'Parachuangia is a subjective synonym of Chuangia'
  • 'Paracoosia belongs to Anomocaridae'
  • 'Paracrepicephalus is an objective synonym of Tricrepicephalus'
  • 'Paracrocephalites belongs to Solenopleuridae'
  • 'Paracryphaeus belongs to Acastidae'
  • 'Paracybantyx belongs to Styginidae'
  • 'Paracybeloides belongs to Encrinuridae'
  • 'Paradamesella belongs to Damesellidae'
  • 'Paradechenella belongs to Proetidae'
  • 'Paradoxides belongs to Paradoxididae'
  • 'Paradoxides pusillus is recombined as Phanoptes pusillus'
  • 'Paradoxididae belongs to Redlichiida'
  • 'Paraenshia belongs to Elviniidae'
  • 'Paraeosoptychoparia belongs to Ptychopariidae'
  • 'Parafrithjofia belongs to Proetidae'
  • 'Paraglobusia belongs to Proetidae'
  • 'Paragnostus is an objective synonym of Condylopyge'
  • 'Paragriffithides belongs to Proetidae'
  • 'Paraharpes belongs to Harpetidae'
  • 'Parahiolites belongs to Ptychopariidae'
  • 'Parahomalonotus belongs to Homalonotidae'
  • 'Parahousia belongs to Pterocephaliidae'
  • 'Parahystricurus belongs to Hystricuridae'
  • 'Paraichangia belongs to Estaingiidae'
  • 'Parajialaopsis belongs to Inouyiidae'
  • 'Parakailia belongs to Encrinuridae'
  • 'Parakailia was reranked as Kailia (Parakailia) and belongs to Kailia' according to Wu 1979
  • 'Parakingaspidoides is a nomen nudum'
  • 'Parakoldinia belongs to Cheilocephalidae'
  • 'Parakoldinioidia belongs to Missisquoiidae'
  • 'Parakotuia belongs to Anomocaridae'
  • 'Paralbertella belongs to Zacanthoididae'
  • 'Paraleiolichas belongs to Lichidae'
  • 'Paralejurus belongs to Styginidae'
  • 'Paralevisia belongs to Ordosiidae'
  • 'Paralichas is replaced by Amphilichas'
  • 'Paralisaniella belongs to Lisaniidae'
  • 'Paralorenzella belongs to Lorenzellidae'
  • 'Paramalungia belongs to Dolerolenidae'
  • 'Paramecephalus is a subjective synonym of Parahiolites'
  • 'Paramegalaspis belongs to Asaphidae'
  • 'Paramicmacca belongs to Ellipsocephalidae'
  • 'Paranacaste is a subjective synonym of Bainella'
  • 'Paranevadella belongs to Judomiidae'
  • 'Paranomocare belongs to Anomocaridae'
  • 'Paranomocarella belongs to Anomocarellidae'
  • 'Paranorwoodia belongs to Norwoodiidae'
  • 'Paranumia is a subjective synonym of Lunacrania'
  • 'Paraolenoides belongs to Dorypygidae'
  • 'Paraolenus belongs to Olenidae'
  • 'Paraorlovia belongs to Asaphiscidae'
  • 'Parapachyaspis belongs to Alokistocaridae'
  • 'Parapagetia belongs to Hebediscidae'
  • 'Parapalpebralia belongs to Proetidae'
  • 'Parapalpebralia andegavensis belongs to Parapalpebralia' according to Pillet 1973
  • 'Parapaokannia belongs to Yinitidae'
  • 'Parapeishania is a subjective synonym of Peishania'
  • 'Paraperiomma belongs to Ptychopariidae'
  • 'Paraphillipsia belongs to Proetidae'
  • 'Paraphillipsinella is a subjective synonym of Paraphillipsinella'
  • 'Paraphillipsinella belongs to Styginidae'
  • 'Paraphoreotropis is a subjective synonym of Tholifrons'
  • 'Parapilekia belongs to Pilekiidae'
  • 'Paraplagiura belongs to Ptychopariidae'
  • 'Paraplesiograulos belongs to Agraulidae'
  • 'Paraplethopeltis belongs to Hystricuridae'
  • 'Paraplicatolina belongs to Olenidae'
  • 'Parapliomera belongs to Pliomeridae'
  • 'Parapoliella belongs to Dolichometopidae'
  • 'Parapoulsenia belongs to Ptychopariidae'
  • 'Paraprotolenella belongs to Ellipsocephalidae'
  • 'Paraqingshuiheella belongs to Changshaniidae'
  • 'Pararaia belongs to Estaingiidae'
  • 'Pararedlichia is a subjective synonym of Eoredlichia'
  • 'Parasajanaspis belongs to Redlichinidae'
  • 'Parasolenopleura is a subjective synonym of Solenopleurina'
  • 'Parasphaerexochus belongs to Cheiruridae'
  • 'Paraszechuanella belongs to Leiostegiidae'
  • 'Paratamdaspis belongs to Asaphidae'
  • 'Paratamdaspis longiformis belongs to Paratamdaspis' according to Ergaliev 2001
  • 'Paratermierella is a subjective synonym of Brevitermierella'
  • 'Paratoernquistia belongs to Toernquistiidae'
  • 'Paratollaspis is an objective synonym of Erbia'
  • 'Paratretaspis belongs to Trinucleidae'
  • 'Paratrinucleus belongs to Trinucleidae'
  • 'Paratungusella belongs to Metadoxididae'
  • 'Parawarburgella belongs to Proetidae'
  • 'Parawarburgella taldyespensis belongs to Parawarburgella' according to Maksimova 1975
  • 'Parayinites belongs to Yinitidae'
  • 'Parayoungia belongs to Cheiruridae'
  • 'Parehmania belongs to Alokistocaridae'
  • 'Pareops belongs to Saukiandidae'
  • 'Pareuloma belongs to Eulomidae'
  • 'Parillaenus belongs to Illaenidae'
  • 'Parisoceraurus belongs to Cheiruridae'
  • 'Parkaspis belongs to Zacanthoididae'
  • 'Parkesolithus belongs to Trinucleidae'
  • 'Parvidumus belongs to Proetidae'
  • 'Parvigena belongs to Tropidocoryphidae'
  • 'Paryfenus belongs to Proetidae'
  • 'Pateraspis belongs to Cheiruridae'
  • 'Patomaspis belongs to Cheiruridae'
  • 'Patomaspis pictus belongs to Patomaspis' according to Ogienko 1974
  • 'Patronaspis belongs to Idahoiidae'
  • 'Pauciella belongs to Pterocephaliidae'
  • 'Pearylandia belongs to Marjumiidae'
  • 'Peculicephalina belongs to Trilobita'
  • 'Pedinaspis belongs to Pterocephaliidae'
  • 'Pedinocephalina belongs to Alokistocaridae'
  • 'Pedinocephalites belongs to Pterocephaliidae'
  • 'Pedinocephalus belongs to Parabolinoididae'
  • 'Pedinocoryphe belongs to Proetidae'
  • 'Pedinopariops belongs to Phacopidae'
  • 'Peichiashania belongs to Kaolishaniidae'
  • 'Peishania belongs to Anomocarellidae'
  • 'Peishanoides belongs to Anomocarellidae'
  • 'Pelicephalus belongs to Pterocephaliidae'
  • 'Pelitlina belongs to Acastidae'
  • 'Peltabellia belongs to Bathyuridae'
  • 'Peltocare belongs to Olenidae'
  • 'Peltura belongs to Olenidae'
  • 'Pelturina belongs to Olenidae'
  • 'Pemphigaspis belongs to Catillicephalidae'
  • 'Penarosa belongs to Nepeidae'
  • 'Penchiopsis belongs to Asaphidae'
  • 'Pennaia belongs to Calmoniidae'
  • 'Pensacola belongs to Yunnanocephalidae'
  • 'Pentagnostus is a subjective synonym of Ptychagnostus'
  • 'Pentagonalia amouslekensis is recombined as Delgadella amouslekensis'
  • 'Peracheilus belongs to Catillicephalidae'
  • 'Perakaspis belongs to Tropidocoryphidae'
  • 'Perakaspis (Bailielloides) was reranked as Bailielloides and belongs to Proetidae'
  • 'Perakaspis (Bailielloides) belongs to Perakaspis' according to Kobayashi and Hamada 1972
  • 'Perakaspis trapezoidalis belongs to Perakaspis' according to Kobayashi and Hamada 1972
  • 'Peraspis belongs to Nileidae'
  • 'Peratagnostus is a subjective synonym of Phaldagnostus'
  • 'Perexigupyge belongs to Proetidae'
  • 'Periomma belongs to Antagmidae'
  • 'Periommella belongs to Ptychopariidae'
  • 'Perioura is a subjective synonym of Modocia'
  • 'Perirehaedulus belongs to Encrinuridae'
  • 'Perischoclonus belongs to Styginidae'
  • 'Perissopliomera belongs to Pliomeridae'
  • 'Perissopyge belongs to Aldonaiidae'
  • 'Permoproetus is a subjective synonym of Ditomopyge'
  • 'Perneraspis belongs to Solenopleuridae'
  • 'Perryus belongs to Encrinuridae'
  • 'Perunaspis belongs to Lichidae'
  • 'Pesaia belongs to Elviniidae'
  • 'Petigurus belongs to Bathyuridae'
  • 'Petrbokia belongs to Nileidae'
  • 'Petruninaspis belongs to Marjumiidae'
  • 'Phacopidella belongs to Phacopidae'
  • 'Phacopidina belongs to Acastidae'
  • 'Phacopina belongs to Calmoniidae'
  • 'Phacopoidea belongs to Phacopida'
  • 'Phacops (Acaste) downingiae macrops belongs to Phacops (Acaste) downingiae' according to Salter 1864
  • 'Phacops (Acaste) downingiae macrops is recombined as Acastocephala macrops'
  • 'Phacops (Boeckops) was reranked as Boeckops and belongs to Phacopidae'
  • 'Phacops (Cryphops) was reranked as Cryphops and belongs to Phacopidae'
  • 'Phacops (Omegops) was reranked as Omegops and belongs to Phacopidae'
  • 'Phacops logani is recombined as Paciphacops logani' according to Maksimova 1972
  • 'Phacops logani is recombined as Paciphacops logani'
  • 'Phacops truncatocaudatus is recombined as Truncatometopus truncatocaudatus' according to Pillet 1960
  • 'Phaeton is replaced by Phaetonides' according to Barrande 1847
  • 'Phaeton is replaced by Phaetonides'
  • 'Phaetonellus belongs to Tropidocoryphidae'
  • 'Phaetonides is an objective synonym of Prionopeltis'
  • 'Phalacroma belongs to Agnostidae'
  • 'Phalagnostus belongs to Agnostidae'
  • 'Phalangocephalus belongs to Dalmanitidae'
  • 'Phanoptes belongs to Paradoxididae'
  • 'Pharostoma is a subjective synonym of Prionocheilus'
  • 'Pharostomatidae belongs to Phacopida'
  • 'Pharostomina belongs to Pharostomatidae'
  • 'Phaseolops [misspelled as Phaselops] belongs to Proetida' according to Fortey and Owens 1975
  • 'Phaseolops belongs to Tropidocoryphidae'
  • 'Phaseolops krafti belongs to Phaseolops' according to Šnajdr 1983
  • 'Phaseolops krafti is recombined as Rokycanocoryphe krafti' according to Pribyl and Vanĕk 1987
  • 'Philipsmithiana is a subjective synonym of Hollardops'
  • 'Phillibole belongs to Proetidae'
  • 'Phillibole (Cystispina) was reranked as Cystispina and belongs to Proetidae'
  • 'Phillibole (Liobole) was reranked as Liobole and belongs to Proetidae'
  • 'Phillibolina belongs to Proetidae'
  • 'Philliboloides belongs to Proetidae'
  • 'Phillipsia belongs to Proetidae'
  • 'Phillipsia spatulata is recombined as Spatulina spatulata'
  • 'Phillipsia verneuili belongs to Phillipsia' according to Barrande 1852
  • 'Phillipsia verneuili is recombined as Dechenella verneuili' according to Kayser 1880
  • 'Phillipsiidae is a subjective synonym of Proetidae'
  • 'Phillipsinella belongs to Styginidae'
  • 'Phillipsinellidae is a subjective synonym of Styginidae'
  • 'Phoidagnostoides is a subjective synonym of Leiagnostus'
  • 'Phoidagnostus belongs to Agnostina'
  • 'Phoreotropis belongs to Pagodiidae'
  • 'Phorocephala belongs to Telephinidae'
  • 'Phylacops belongs to Cyclopygidae'
  • 'Phylacteridae belongs to Ptychopariida'
  • 'Phylacterus belongs to Phylacteridae'
  • 'Phyllaspis belongs to Proetidae'
  • 'Phyllaspis raniceps belongs to Phyllaspis' according to Richter 1863
  • 'Physemataspis (Prophysemataspis) was reranked as Prophysemataspis and belongs to Encrinuridae'
  • 'Pianaspis belongs to Papyriaspididae'
  • 'Piaziella belongs to Ptychopariidae'
  • 'Pilekia belongs to Pilekiidae'
  • 'Piliolites belongs to Trilobita'
  • 'Pilletina belongs to Acastidae'
  • 'Piltonia belongs to Proetidae'
  • 'Pinctus belongs to Dokimocephalidae'
  • 'Pingluaspis is corrected as Pinglusapis and belongs to Ptychopariidae'
  • 'Pingluia belongs to Solenopleuridae'
  • 'Pingquania belongs to Damesellidae'
  • 'Piochella [misspelled as Piochiella] belongs to Ptychopariidae'
  • 'Pjatkovaspellus belongs to Anomocaridae'
  • 'Placoparia belongs to Pliomeridae'
  • 'Placoparina belongs to Cheiruridae'
  • 'Placosema is a subjective synonym of Genevievella'
  • 'Plaesiacomia belongs to Homalonotidae'
  • 'Plagiolaria belongs to Phacopidae'
  • 'Plagiura belongs to Ptychopariidae'
  • 'Plagiurella is a subjective synonym of Plagiura'
  • 'Planaspis belongs to Aldonaiidae'
  • 'Planiscutellum belongs to Styginidae'
  • 'Planocephalus belongs to Saukiandidae'
  • 'Planodiscus is a subjective synonym of Parapagetia' according to Jell 1997
  • 'Planodiscus patulus belongs to Planodiscus' according to Korobov 1980
  • 'Planodiscus patulus is recombined as Parapagetia patulus' according to Jell 1997
  • 'Planolimbus belongs to Ellipsocephalidae'
  • 'Plasiaspis belongs to Encrinuridae'
  • 'Platagnostus is a subjective synonym of Phalacroma'
  • 'Platillaenus belongs to Illaenidae'
  • 'Platyantyx belongs to Tropidocoryphidae'
  • 'Platycalymene belongs to Calymenidae'
  • 'Platycoryphe belongs to Homalonotidae'
  • 'Platydiamesus belongs to Illaenuridae'
  • 'Platyharpes is an objective synonym of Hibbertia'
  • 'Platylichas (Rontrippia) was reranked as Rontrippia and belongs to Lichidae'
  • 'Platylisania belongs to Lisaniidae'
  • 'Platymetopus is replaced by Paralichas' according to Reed 1902
  • 'Platymetopus is replaced by Paralichas'
  • 'Platynotus is replaced by Arctinurus'
  • 'Platypeltoides belongs to Nileidae'
  • 'Platyscutellum belongs to Styginidae'
  • 'Plebiellus belongs to Anomocarellidae'
  • 'Plectasaphus belongs to Asaphidae'
  • 'Plectrella belongs to Ptychaspididae'
  • 'Plectrifer belongs to Rhyssometopidae'
  • 'Plesionevadia belongs to Nevadiidae'
  • 'Plethometopus is a subjective synonym of Plethopeltis'
  • 'Plethopeltella belongs to Leiostegiidae'
  • 'Plethopeltides belongs to Plethopeltidae'
  • 'Plethopeltis belongs to Plethopeltidae'
  • 'Plethopeltoides belongs to Plethopeltidae'
  • 'Plicatolina belongs to Olenidae'
  • 'Plicatolinella belongs to Olenidae'
  • 'Pliomera belongs to Pliomeridae'
  • 'Pliomera martelli is recombined as Pliomerina martelli'
  • 'Pliomeraspis is an objective synonym of Pliomerina'
  • 'Pliomerella belongs to Pliomeridae'
  • 'Pliomerellus belongs to Trilobita'
  • 'Pliomeridius belongs to Pliomeridae'
  • 'Pliomerina belongs to Pliomeridae'
  • 'Pliomeroides belongs to Pilekiidae'
  • 'Pliomerops belongs to Pliomeridae'
  • 'Plutonia is replaced by Plutonides'
  • 'Plutonides belongs to Paradoxididae'
  • 'Podoliproetus belongs to Proetidae'
  • 'Podowrinella belongs to Pterygometopidae'
  • 'Pogrebovites belongs to Panderiidae'
  • 'Poletaevella belongs to Olenellina'
  • 'Poliellaites belongs to Dolichometopidae'
  • 'Poliellaspis belongs to Dolichometopidae'
  • 'Poliellina belongs to Dolichometopidae'
  • 'Polyariella belongs to Illaenuridae'
  • 'Polycyrtaspis is corrected as Polycertaspis and belongs to Polycyrtaspididae'
  • 'Polyeres is a nomen oblitum'
  • 'Polypleuraspis belongs to Dolichometopidae'
  • 'Ponumia is a subjective synonym of Aphelotoxon'
  • 'Popigaia belongs to Dorypygidae'
  • 'Poroscutellum belongs to Styginidae'
  • 'Portaginus is a subjective synonym of Brongniartella'
  • 'Portaginus robustus is recombined as Brongniartella robusta'
  • 'Portentosus belongs to Remopleurididae'
  • 'Porterfieldia belongs to Olenidae'
  • 'Poshania belongs to Ordosiidae'
  • 'Postfallotaspis belongs to Holmiidae'
  • 'Poulsenella belongs to Ptychopariidae'
  • 'Poulsenia belongs to Ptychopariidae'
  • 'Pradesia belongs to Isocolidae'
  • 'Pradoella belongs to Calymenidae'
  • 'Praedechenella belongs to Proetidae'
  • 'Praedechenella liniclivosa belongs to Praedechenella' according to Maksimova 1952
  • 'Praepatokephalus belongs to Remopleurididae'
  • 'Pragoproetus belongs to Proetidae'
  • 'Prantlia belongs to Proetidae'
  • 'Prehousia belongs to Pterocephaliidae'
  • 'Presbynileus belongs to Asaphidae'
  • 'Priceaspis belongs to Asaphidae'
  • 'Fitzroyaspis is a subjective synonym of Priceaspis'
  • 'Pricyclopyge belongs to Cyclopygidae'
  • 'Primaspis belongs to Odontopleuridae'
  • 'Primoriella belongs to Paradoxididae'
  • 'Princetonella belongs to Dikelocephalidae'
  • 'Prionocheilus belongs to Pharostomatidae'
  • 'Prionopeltis belongs to Tropidocoryphidae'
  • 'Prionopyge is an objective synonym of Onychopyge'
  • 'Proagnostus belongs to Ammagnostidae'
  • 'Proampyx belongs to Agraulidae'
  • 'Proapatokephaloides belongs to Pterocephaliidae'
  • 'Proapatokephalops belongs to Remopleurididae'
  • 'Proasaphiscus belongs to Proasaphiscidae'
  • 'Proaulacopleura is a subjective synonym of Aphelaspis'
  • 'Proavus belongs to Solenopleuridae'
  • 'Probilacunaspis belongs to Eulomidae'
  • 'Probolichas belongs to Lichidae'
  • 'Probolium is replaced by Neoprobolium'
  • 'Probolops belongs to Calmoniidae'
  • 'Probowmania belongs to Ptychopariidae'
  • 'Probowmania (Mufushania) was reranked as Mufushania and belongs to Ptychopariidae'
  • 'Probowmania (Mufushania) was reranked as Mufushania and belongs to Ptychopariidae'
  • 'Proceratopyge belongs to Ceratopygidae'
  • 'Prochuangia belongs to Pagodiidae'
  • 'Prodalmanitina belongs to Diaphanometopidae'
  • 'Prodalmanitina nikolayevi belongs to Prodalmanitina' according to Chugaeva 1968
  • 'Prodamesella belongs to Trilobita'
  • 'Prodiacoryphe belongs to Proetidae'
  • 'Prodiacoryphe osmolskae belongs to Prodiacoryphe' according to Yuan 1988
  • 'Prodontochile belongs to Dalmanitidae'
  • 'Proehmaniella belongs to Alokistocaridae'
  • 'Proerbia belongs to Dinesidae'
  • 'Proetidella is a subjective synonym of Decoroproetus'
  • 'Proetina belongs to Tropidocoryphidae'
  • 'Proetocephalus belongs to Proetidae'
  • 'Proetocephalus anceps belongs to Proetocephalus' according to Lütke 1977
  • 'Proetopeltis belongs to Tropidocoryphidae'
  • 'Proetus belongs to Proetidae'
  • 'Proetus (Astroproetus) was reranked as Astroproetus and belongs to Proetidae'
  • 'Proetus (Bohemiproetus) was reranked as Bohemiproetus and belongs to Proetidae'
  • 'Clypoproetus is a subjective synonym of Astroproetus'
  • 'Proetus (Cornuproetus) trautensteinensis is recombined as Xiphogonium trautensteinensis' according to Vanek and Valicek 2002
  • 'Proetus (Crassiproetus) was reranked as Crassiproetus and belongs to Proetidae'
  • 'Euproetus is an objective synonym of Proetus'
  • 'Proetus (Gerastos) was reranked as Gerastos and belongs to Proetidae'
  • 'Proetus (Neoproetus) was reranked as Neoproetus and belongs to Proetidae'
  • 'Proetus (Piriproetus) was reranked as Piriproetus and belongs to Tropidocoryphidae'
  • 'Proetus (Pribylia) was reranked as Pribylia and belongs to Tropidocoryphidae'
  • 'Proetus (Pudoproetus) was reranked as Pudoproetus and belongs to Proetidae'
  • 'Proetus (Tropidocoryphe) was reranked as Tropidocoryphe and belongs to Tropidocoryphidae'
  • 'Warburgaspis is a subjective synonym of Decoroproetus'
  • 'Proetus bohemicus is recombined as Bohemiproetus bohemicus'
  • 'Proetus dillensis is recombined as Franconicabole dillensis'
  • 'Proetus fallax belongs to Proetus' according to Barrande 1846
  • 'Proetus girvanensis is recombined as Paraproetus girvanensis'
  • 'Proetus intermedius is recombined as Interproetus intermedius' according to Šnajdr 1977
  • 'Proetus listei is corrected as Proetus listeri and belongs to Proetus'
  • 'Proetus loveni belongs to Proetus' according to Barrande 1846
  • 'Proetus macrocephalus is recombined as Monodechenella macrocephala'
  • 'Proetus pachydermatus is recombined as Pachyproetus pachydermatus' according to Lutke 1990
  • 'Proetus parvigena is recombined as Parvigena parvigena'
  • 'Proetus pulcher is recombined as Pulcherproetus pulcher' according to Lütke 1990
  • 'Proetus rondeaui belongs to Proetus' according to Oehlert 1889
  • 'Proetus rondeaui is recombined as Oehlertia rondeaui' according to Pillet 1973
  • 'Proetus rondeaui is recombined as Oehlertaspis rondeaui' according to Pillet and Vanĕk 1974
  • 'Proetus ryckholti is recombined as Ryckholtia ryckholti'
  • 'Proetus ryckholti is corrected as Proetus ryckholtii and belongs to Proetus' according to Barrande 1846
  • 'Prohedinella belongs to Olenidae'
  • 'Prohedinia belongs to Papyriaspididae'
  • 'Proichangia is a subjective synonym of Pararaia' according to Jell 1990
  • 'Prokootenia belongs to Dorypygidae'
  • 'Proliobole is a subjective synonym of Panibole'
  • 'Proliostracus belongs to Ptychopariidae'
  • 'Promegalaspides belongs to Asaphidae'
  • 'Promegalaspides (Borogothus) was reranked as Borogothus and belongs to Asaphidae'
  • 'Promesus is a subjective synonym of Macronoda'
  • 'Proricephalus belongs to Ptychaspididae'
  • 'Proromma belongs to Cheiruridae'
  • 'Prosaukia belongs to Saukiidae'
  • 'Proscharyia belongs to Asaphidae'
  • 'Prosopiscus belongs to Prosopiscidae'
  • 'Prospectatrix belongs to Cyclopygidae'
  • 'Prostrix belongs to Encrinuridae'
  • 'Prosymphysurus belongs to Dolichometopidae'
  • 'Protacanthina belongs to Acastidae'
  • 'Protagraulos belongs to Ellipsocephalidae'
  • 'Protaitzehoia belongs to Damesellidae'
  • 'Protemnites belongs to Elviniidae'
  • 'Proteuloma belongs to Eulomidae'
  • 'Protillaenus is a subjective synonym of Blountia'
  • 'Protocalymene belongs to Calymenidae'
  • 'Protocerauroides belongs to Cheiruridae'
  • 'Protohedinia belongs to Ptychopariidae'
  • 'Protolenella belongs to Ellipsocephalidae'
  • 'Protolenella conica belongs to Protolenella' according to Qian and Yao 1974
  • 'Protolenus belongs to Ellipsocephalidae'
  • 'Protolloydolithus belongs to Trinucleidae'
  • 'Protopeltura belongs to Olenidae'
  • 'Protophillipsinella is a subjective synonym of Paraphillipsinella'
  • 'Protopliomerella belongs to Pliomeridae'
  • 'Protopliomerops belongs to Pliomeridae'
  • 'Protopresbynileus belongs to Asaphidae'
  • 'Protoptychopyge belongs to Asaphidae'
  • 'Protoscutellum is a subjective synonym of Planiscutellum'
  • 'Protostygina belongs to Styginidae'
  • 'Protypus belongs to Dorypygidae'
  • 'Prouktaspis belongs to Jakutidae'
  • 'Proveedoria belongs to Alokistocaridae'
  • 'Prozacanthoides belongs to Zacanthoididae'
  • 'Pruvostinoides belongs to Ellipsocephalidae'
  • 'Psalaspis belongs to Idahoiidae'
  • 'Psalikilopsis belongs to Hystricuridae'
  • 'Psalikilus belongs to Hystricuridae'
  • 'Psephosthenaspis belongs to Bathyuridae'
  • 'Pseudagnostina is a subjective synonym of Pseudagnostus'
  • 'Pseudampyxina belongs to Raphiophoridae'
  • 'Pseudanomocarina belongs to Proasaphiscidae'
  • 'Arrhenaspis is a subjective synonym of Duibianaspis'
  • 'Pseudasaphus limatus is recombined as Valdaites limatus' according to Balashova 1976
  • 'Pseudatops belongs to Atopidae'
  • 'Pseudichangia is a subjective synonym of Hsuaspis'
  • 'Pseudoacrocephalites belongs to Trilobita' according to Courtessole and Pillet 1976
  • 'Pseudoacrocephalites is replaced by Rosovaspis' according to Courtessole and Pillet 1976
  • 'Pseudoacrocephalites belongs to Eulomidae'
  • 'Pseudoalokistocare is a subjective synonym of Alokistocare'
  • 'Pseudoasaphus belongs to Asaphidae'
  • 'Pseudobarrandia is an objective synonym of Rokycania'
  • 'Pseudobasilicus belongs to Asaphidae'
  • 'Pseudobirmanites is a subjective synonym of Madygenia'
  • 'Pseudocalymene belongs to Leiostegiidae'
  • 'Pseudocheirurus belongs to Cheiruridae'
  • 'Pseudoclelandia belongs to Trilobita'
  • 'Pseudocryphaeus belongs to Acastidae'
  • 'Pseudocybele belongs to Pliomeridae'
  • 'Pseudocyclopyge is a nomen nudum' according to Ergaliev 1981
  • 'Pseudodechenella belongs to Proetidae'
  • 'Pseudodudu belongs to Proetidae'
  • 'Pseudoerbia belongs to Dinesidae'
  • 'Pseudoeteraspis belongs to Agraulidae'
  • 'Pseudogriphasaphus belongs to Asaphidae'
  • 'Pseudogygites belongs to Asaphidae'
  • 'Pseudohysterolenus belongs to Ceratopygidae'
  • 'Pseudohystricurus belongs to Dimeropygidae'
  • 'Pseudokadyella belongs to Ellipsocephalidae'
  • 'Pseudokainella belongs to Remopleurididae'
  • 'Pseudokingstonia belongs to Cheilocephalidae'
  • 'Pseudokoldinella belongs to Plethopeltidae'
  • 'Pseudokoldinia belongs to Cheilocephalidae'
  • 'Pseudokoldinioidia belongs to Missisquoiidae'
  • 'Pseudolancastria is a subjective synonym of Lancastria'
  • 'Pseudolenus belongs to Ellipsocephalidae'
  • 'Pseudoliostracina is an objective synonym of Lioparia'
  • 'Pseudolorenzella belongs to Lorenzellidae'
  • 'Pseudomapania belongs to Mapaniidae'
  • 'Pseudomegalaspis belongs to Asaphidae'
  • 'Pseudomera belongs to Pliomeridae'
  • 'Pseudomera kanoshensis is recombined as Kanoshia kanoshensis'
  • 'Pseudomexicella belongs to Alokistocaridae'
  • 'Pseudomonaspis is an objective synonym of Acidaspis'
  • 'Pseudonileus is replaced by Protopresbynileus'
  • 'Pseudonileus is an objective synonym of Hemibarrandia'
  • 'Pseudoolenoides belongs to Bathyuridae'
  • 'Pseudopaokannia belongs to Yinitidae'
  • 'Pseudoperonopsis is a subjective synonym of Diplorrhina'
  • 'Pseudopetigurus belongs to Isocolidae'
  • 'Pseudophalacroma belongs to Ptychagnostidae'
  • 'Pseudophillipsia belongs to Proetidae'
  • 'Pseudoproetus belongs to Proetidae'
  • 'Pseudoprotolenella belongs to Ellipsocephalidae'
  • 'Pseudoptychoparia is an objective synonym of Yunnanocephalus'
  • 'Pseudoptyocephalus belongs to Asaphidae'
  • 'Pseudoresserops belongs to Chengkouaspididae'
  • 'Pseudorhaptagnostus is a subjective synonym of Neoagnostus'
  • 'Pseudosalteria belongs to Trilobita'
  • 'Pseudosaratogia belongs to Dokimocephalidae'
  • 'Pseudosarkia belongs to Trilobita'
  • 'Pseudosaukia belongs to Elviniidae'
  • 'Pseudosaukianda belongs to Saukiandidae'
  • 'Pseudosolenoparia belongs to Solenopleuridae'
  • 'Pseudosolenopleura belongs to Wuaniidae'
  • 'Pseudospatulina belongs to Proetidae'
  • 'Pseudospatulina belongs to Archegoninae' according to Hahn and Brauckmann 1989
  • 'Pseudostygina belongs to Styginidae'
  • 'Pseudotalbotina belongs to Lonchocephalidae'
  • 'Pseudotermierella is a nomen nudum'
  • 'Pseudotupolichas belongs to Lichidae'
  • 'Pseudowaribole belongs to Proetidae'
  • 'Pseudoyuepingia belongs to Ceratopygidae'
  • 'Psilacella belongs to Cyclopygidae'
  • 'Psilocara belongs to Olenidae'
  • 'Psilocephalina belongs to Asaphidae'
  • 'Psilocephalinella belongs to Nileidae'
  • 'Psiloyuepingia is a subjective synonym of Tamdaspis'
  • 'Psychopyge belongs to Acastidae'
  • 'Ptarmigania belongs to Dolichometopidae'
  • 'Ptarmiganoides belongs to Zacanthoididae'
  • 'Pterocephalia belongs to Pterocephaliidae'
  • 'Pterocephalidae is replaced by Pterocephaliidae'
  • 'Petrocephaliidae is a misspelling of Pterocephaliidae'
  • 'Pterocephalops belongs to Dikelocephalidae'
  • 'Pterocoryphe belongs to Tropidocoryphidae'
  • 'Pteroparia belongs to Tropidocoryphidae'
  • 'Pterygometopidae belongs to Phacopida'
  • 'Pterygometopus belongs to Pterygometopidae'
  • 'Ptilillaenus belongs to Illaenidae'
  • 'Acidusus is a subjective synonym of Ptychagnostus'
  • 'Ptychaspis belongs to Ptychaspididae'
  • 'Ptychocephalus is corrected as Ptyocephalus and belongs to Asaphidae'
  • 'Ptychometopus belongs to Pharostomatidae'
  • 'Ptychoparella belongs to Ptychopariidae'
  • 'Ptychoparia belongs to Ptychopariidae'
  • 'Ptychoparia intermedia is recombined as Changqingia intermedia' according to Zan 1992
  • 'Ptychoparia theano belongs to Ptychoparia' according to Walcott 1905
  • 'Ptychoparia theano is recombined as Emmrichella theano' according to Walcott 1911
  • 'Ptychoparia theano is recombined as Lioparia theano' according to Zhang and Jell 1987
  • 'Ptychoparioides is a subjective synonym of Ptychoparia'
  • 'Ptychoparopsis belongs to Ellipsocephalidae'
  • 'Ptychopleurites belongs to Pagodiidae'
  • 'Ptychopyge belongs to Asaphidae'
  • 'Ptychopyge aciculata is recombined as Valdaites aciculatus'
  • 'Ptychopyge aciculata is recombined as Valdaites aciculatus' according to Balashova 1976
  • 'Pugilator belongs to Remopleurididae'
  • 'Pugionicauda belongs to Kingstoniidae'
  • 'Pulcherproetus belongs to Proetidae'
  • 'Pulchricapitus belongs to Pterocephaliidae'
  • 'Pumilina belongs to Aldonaiidae'
  • 'Punctaspis belongs to Trilobita'
  • 'Punctularia is a subjective synonym of Ptychopleurites'
  • 'Punillaspis belongs to Calmoniidae'
  • 'Punka belongs to Bathyuridae'
  • 'Pyraustocranium belongs to Telephinidae'
  • 'Pytine belongs to Raphiophoridae'
  • 'Pyttstrigis belongs to Idahoiidae'
  • 'Qiaodiella belongs to Mayiellidae'
  • 'Qiaotingaspis belongs to Mayiellidae'
  • 'Qingkouia belongs to Yinitidae'
  • 'Qingshuihella belongs to Elviniidae'
  • 'Qingzhenaspis belongs to Zacanthoididae'
  • 'Qinlingia is replaced by Qinlingialingia'
  • 'Qinlingia henanensis is recombined as Qinlingialingia henanensis'
  • 'Qinlingia magnoccipitis is recombined as Qinlingialingia magnoccipitis'
  • 'Qinlingia transversa is recombined as Qinlingialingia transversa'
  • 'Qinlingialingia belongs to Anomocaridae'
  • 'Quadragnostus is a subjective synonym of Diplorrhina'
  • 'Quadraticephalus is a subjective synonym of Changia'
  • 'Quadratoproetus belongs to Tropidocoryphidae'
  • 'Quebecaspis belongs to Lonchocephalidae'
  • 'Quinquecosta belongs to Pliomeridae'
  • 'Quitacetra belongs to Mapaniidae'
  • 'Quitalia belongs to Mapaniidae'
  • 'Quyuania belongs to Styginidae'
  • 'Raaschella is a subjective synonym of Glaphyraspis'
  • 'Raashellina belongs to Lonchocephalidae'
  • 'Rabienops belongs to Phacopidae'
  • 'Rabuloproetus belongs to Tropidocoryphidae'
  • 'Radiaspis belongs to Odontopleuridae'
  • 'Radiolichas belongs to Lichidae'
  • 'Radioscutellum belongs to Styginidae'
  • 'Radiurus belongs to Cheiruridae'
  • 'Radnoria belongs to Brachymetopidae'
  • 'Rampartaspis is a subjective synonym of Leptoplastides'
  • 'Rananasus belongs to Bathyuridae'
  • 'Randaynia belongs to Bathyuridae'
  • 'Randicephalus belongs to Dikelocephalidae'
  • 'Ranunculoproetus belongs to Tropidocoryphidae'
  • 'Raphioampyx belongs to Raphiophoridae'
  • 'Raphiophorus belongs to Raphiophoridae'
  • 'Rasettaspis belongs to Illaenuridae'
  • 'Rasettia belongs to Illaenuridae'
  • 'Ratinkaspis belongs to Cheiruridae'
  • 'Rawlinsella belongs to Bolaspididae'
  • 'Raymondarges is a subjective synonym of Dicranopeltis'
  • 'Raymondarges is a subjective synonym of Dicranopeltis' according to Tripp 1957
  • 'Raymondaspis belongs to Styginidae'
  • 'Raymondella belongs to Raphiophoridae'
  • 'Raymondia is a misspelling of Raymondina'
  • 'Raymondina belongs to Raymondinidae'
  • 'Reacalymene belongs to Calymenidae'
  • 'Realaspis belongs to Saukiandidae'
  • 'Rectifrontinella belongs to Anomocaridae'
  • 'Redlichaspis belongs to Lisaniidae'
  • 'Redlichia (Pteroredlichia) was reranked as Pteroredlichia and belongs to Redlichiidae'
  • 'Redlichops belongs to Redlichiidae'
  • 'Reedaspis is an objective synonym of Raymondella'
  • 'Reediella belongs to Proetidae'
  • 'Reedocalymene belongs to Calymenidae'
  • 'Reedolithus belongs to Trinucleidae'
  • 'Reedops belongs to Phacopidae'
  • 'Regina belongs to Ptychopariidae'
  • 'Regius belongs to Ptychopariidae'
  • 'Rejkocephalus belongs to Paradoxididae'
  • 'Remipyga belongs to Cheiruridae'
  • 'Remizites belongs to Olenidae'
  • 'Remopleurella belongs to Remopleurididae'
  • 'Remopleurides belongs to Remopleurididae'
  • 'Remopleuridiella belongs to Remopleurididae'
  • 'Remopleuridioides is a subjective synonym of Nileus'
  • 'Renniella belongs to Calmoniidae'
  • 'Repinaella belongs to Fallotaspididae'
  • 'Reraspis belongs to Cheiruridae'
  • 'Resimopsis belongs to Palaeolenidae'
  • 'Resseraspis belongs to Illaenuridae'
  • 'Resseria belongs to Trilobita'
  • 'Resserops belongs to Saukiandidae'
  • 'Resseropsis is a nomen nudum'
  • 'Retamaspis belongs to Dalmanitidae'
  • 'Reticuloharpes is a subjective synonym of Harpes'
  • 'Reubenella belongs to Leiostegiidae'
  • 'Reuscholithus belongs to Trinucleidae'
  • 'Reussia is replaced by Reussiana' according to Snajdr 1987
  • 'Reussiana belongs to Dalmanitidae'
  • 'Rhadinopleura belongs to Alsataspididae'
  • 'Rhaptagnostus is a subjective synonym of Pseudagnostus'
  • 'Rhax is replaced by Rhaxeros'
  • 'Rhaxeros belongs to Styginidae'
  • 'Rhenogriffides belongs to Proetidae'
  • 'Rhenops belongs to Acastidae'
  • 'Rhinophacops belongs to Phacopidae'
  • 'Rhinoreedops belongs to Phacopidae'
  • 'Rhinotarion is a subjective synonym of Harpidella'
  • 'Rhinotarion is a subjective synonym of Harpidella'
  • 'Rhodotypiscus is a subjective synonym of Doryagnostus'
  • 'Rhombampyx belongs to Raphiophoridae'
  • 'Rhyssometropus belongs to Rhyssometopidae'
  • 'Richardsonella belongs to Remopleurididae'
  • 'Richardsonella laciniosa belongs to Richardsonella' according to Shergold 1972
  • 'Richardsonella laciniosa is recombined as Mendosina laciniosa' according to Shergold 1975
  • 'Richterarges belongs to Lichidae'
  • 'Richteraspis belongs to Tropidocoryphidae'
  • 'Richterella belongs to Proetidae'
  • 'Richterops belongs to Saukiandidae'
  • 'Rimouskia belongs to Solenopleuridae'
  • 'Rinconia belongs to Ellipsocephalidae'
  • 'Ritella belongs to Dokimocephalidae'
  • 'Robergia belongs to Remopleurididae'
  • 'Robergiella belongs to Remopleurididae'
  • 'Rochaeva is a nomen nudum'
  • 'Roksaspis belongs to Parabolinoididae'
  • 'Rokycania is a subjective synonym of Illaenopsis'
  • 'Rokycanocoryphe belongs to Tropidocoryphidae'
  • 'Roncellia belongs to Dalmanitidae'
  • 'Rondocephalus belongs to Dinesidae'
  • 'Rongxiella belongs to Encrinuridae'
  • 'Rorringtonia belongs to Rorringtoniidae'
  • 'Rosovaspis is an objective synonym of Dolgeuloma'
  • 'Rossaspis belongs to Pliomeridae'
  • 'Rowia is a subjective synonym of Parehmania'
  • 'Ruichengaspis belongs to Wuaniidae'
  • 'Ruichengella is a subjective synonym of Plagiura'
  • 'Ruzickaia is a subjective synonym of Conokephalina'
  • 'Sacha belongs to Llanoaspididae'
  • 'Sachaspis belongs to Anomocaridae'
  • 'Sagavia belongs to Cyclopygidae'
  • 'Sagitaspis belongs to Pagodiidae'
  • 'Sagitoides belongs to Pagodiidae'
  • 'Sailycaspis belongs to Ellipsocephalidae'
  • 'Saimachia belongs to Dokimocephalidae'
  • 'Salankanaspis belongs to Ptychopariidae'
  • 'Saltaspis belongs to Olenidae'
  • 'Salteria is a subjective synonym of Meneviella'
  • 'Salterocoryphe belongs to Calymenidae'
  • 'Salterolithus belongs to Trinucleidae'
  • 'Ulricholithus is a subjective synonym of Broeggerolithus'
  • 'Sambremeusaspis belongs to Phacopidae'
  • 'Sanaschtykgolia belongs to Corynexochidae'
  • 'Sanbernardaspis belongs to Asaphidae'
  • 'Sandoveria belongs to Oryctocephalidae'
  • 'Sangzhiscutellum belongs to Styginidae'
  • 'Sanidopyge belongs to Acastidae'
  • 'Sao belongs to Solenopleuridae'
  • 'Saonella belongs to Kingstoniidae'
  • 'Sapushania belongs to Redlichiidae'
  • 'Sarassina belongs to Redlichiidae'
  • 'Saratogia belongs to Idahoiidae'
  • 'Sardaspis is a subjective synonym of Blayacina'
  • 'Sardoredlichia belongs to Redlichiidae'
  • 'Sarkia belongs to Sarkiidae'
  • 'Sarkiidae belongs to Trilobita'
  • 'Saukia belongs to Saukiidae'
  • 'Saukiella belongs to Saukiidae'
  • 'Saukioides belongs to Ptychaspididae'
  • 'Scabrella belongs to Homalonotidae'
  • 'Scabriscutellum belongs to Styginidae'
  • 'Sceptaspis belongs to Pterygometopidae'
  • 'Schaderthalaspis belongs to Proetidae'
  • 'Schagonaria belongs to Paradoxididae'
  • 'Schantungia belongs to Leiostegiidae'
  • 'Scharyia belongs to Scharyiidae'
  • 'Scharyiidae belongs to Proetida'
  • 'Schistocephalus belongs to Palaeolenidae'
  • 'Schistometopus belongs to Ptychopariidae'
  • 'Schizophillipsia belongs to Proetidae'
  • 'Schizophorus is a subjective synonym of Asaphus'
  • 'Schizoproetina belongs to Proetidae'
  • 'Schizoproetoides belongs to Proetidae'
  • 'Schizoproetus belongs to Proetidae'
  • 'Schizostylus belongs to Calmoniidae'
  • 'Schmalenseeia belongs to Burlingiidae'
  • 'Schoharia belongs to Dalmanitidae'
  • 'Schopfaspis belongs to Alokistocaridae'
  • 'Schoriecare belongs to Anomocaridae'
  • 'Schoriella belongs to Anomocaridae'
  • 'Schyilaspis belongs to Marjumiidae'
  • 'Scinocephalus belongs to Remopleurididae'
  • 'Scintilla belongs to Anomocaridae'
  • 'Scopelochasmops belongs to Pterygometopidae'
  • 'Scotiella belongs to Acastidae'
  • 'Scotoharpes belongs to Harpetidae'
  • 'Scottia is replaced by Ganovexopyge'
  • 'Sculptaspis belongs to Remopleurididae'
  • 'Sculptella belongs to Remopleurididae'
  • 'Sculptoproetus belongs to Tropidocoryphidae'
  • 'Scutellum belongs to Styginidae'
  • 'Sdzuyella belongs to Holocephalinidae'
  • 'Sdzuyomia belongs to Nevadiidae'
  • 'Sectigena belongs to Ellipsocephalidae'
  • 'Segmentagnostus is a subjective synonym of Corrugatagnostus'
  • 'Seisonia belongs to Pilekiidae'
  • 'Sekwiaspis belongs to Redlichinidae'
  • 'Seleneceme belongs to Alsataspididae'
  • 'Selenoharpes belongs to Harpetidae'
  • 'Selenopeltis belongs to Odontopleuridae'
  • 'Selenopeltoides belongs to Odontopleuridae'
  • 'Selenoptychus belongs to Cyclopygidae'
  • 'Selenoptychus rotundatus belongs to Selenoptychus' according to Hawle and Corda 1847
  • 'Selenoptychus rotundatus is a subjective synonym of Heterocyclopyge pachycephala' according to Marek 1961
  • 'Seletella is a subjective synonym of Onchonotellus'
  • 'Seletoides belongs to Pagodiidae'
  • 'Semadiscus belongs to Weymouthiidae'
  • 'Semagnostus belongs to Agnostidae'
  • 'Semicyclocephalus belongs to Plethopeltidae'
  • 'Semiproetus belongs to Proetidae'
  • 'Semisphaerocephalus belongs to Ptychopariidae'
  • 'Senticucullus is a subjective synonym of Coronocephalus'
  • 'Serksia is a nomen nudum'
  • 'Serksioides is a nomen nudum'
  • 'Serrania belongs to Bigotinidae'
  • 'Sevillia belongs to Proetidae'
  • 'Shabaella belongs to Oryctocephalidae'
  • 'Shanghaia belongs to Dolichometopidae'
  • 'Shanghaiaspis belongs to Solenopleuridae'
  • 'Shantungia is corrected as Shangtungia and belongs to Damesellidae'
  • 'Shatania belongs to Kueichowiidae'
  • 'Shengia belongs to Lisaniidae'
  • 'Shenjiawania belongs to Nileidae'
  • 'Shergoldia belongs to Tsinaniidae'
  • 'Shickshockia belongs to Marjumiidae'
  • 'Shifangia belongs to Estaingiidae'
  • 'Shilengshuia belongs to Antagmidae'
  • 'Shipaiella belongs to Dorypygidae'
  • 'Shitaia belongs to Idahoiidae'
  • 'Shivelicus belongs to Corynexochidae'
  • 'Shizhudiscus is a subjective synonym of Tsunyidiscus'
  • 'Shumardia belongs to Shumardiidae'
  • 'Shumardoella belongs to Shumardiidae'
  • 'Shumardops belongs to Shumardiidae'
  • 'Sibiriopeltis is a nomen nudum'
  • 'Sichuanolenus belongs to Estaingiidae'
  • 'Sigmakainella belongs to Remopleurididae'
  • 'Sigmocheilus belongs to Pterocephaliidae'
  • 'Signatops belongs to Phacopidae'
  • 'Simaproetus belongs to Proetidae'
  • 'Simulolenus is a subjective synonym of Olenus'
  • 'Sinampyxina belongs to Raphiophoridae'
  • 'Sinijanella belongs to Dolichometopidae'
  • 'Sinobole belongs to Proetidae'
  • 'Sinocrepicephalus belongs to Crepicephalidae'
  • 'Sinocybele belongs to Encrinuridae'
  • 'Sinocyrtoproetus belongs to Proetidae'
  • 'Sinocyrtoproetus belongs to Proetidae' according to Yuan and Xiang 1998
  • 'Sinoharpes is a subjective synonym of Dubhglasina'
  • 'Sinolenus is a subjective synonym of Labradoria'
  • 'Sinoparapilekia belongs to Pilekiidae'
  • 'Sinosaukia belongs to Saukiidae'
  • 'Sivovella belongs to Anomocaridae'
  • 'Skelipyx belongs to Cheiruridae'
  • 'Skemmatocare belongs to Proetidae'
  • 'Skemmatopyge belongs to Proetidae'
  • 'Skljarella belongs to Alsataspididae'
  • 'Skreiaspis belongs to Agraulidae'
  • 'Skryjagnostus belongs to Agnostina'
  • 'Smeathenia is a subjective synonym of Salterolithus'
  • 'Sokhretia belongs to Acastidae'
  • 'Solenoparia bigranosa is recombined as Trachoparia bigranosa'
  • 'Solenopleura belongs to Solenopleuridae'
  • 'Solenopleuracea belongs to Ptychopariida' according to G. Geyer and E. Landing 2001
  • 'Solenopleurella belongs to Solenopleuridae'
  • 'Solenopleuridae belongs to Ptychopariida'
  • 'Solenopleurina is an objective synonym of Herse'
  • 'Solenopleuropsis belongs to Solenopleuridae'
  • 'Solontzella belongs to Amgaspididae'
  • 'Sombrerella belongs to Antagmidae'
  • 'Songkania belongs to Aulacopleuridae'
  • 'Songtaoia belongs to Hungaiidae'
  • 'Songxites belongs to Dalmanitidae'
  • 'Sonoraspis is a subjective synonym of Glossopleura'
  • 'Soomaspis belongs to Nektaspida'
  • 'Spathacalymene belongs to Calymenidae'
  • 'Spatulina belongs to Proetidae'
  • 'Spencella belongs to Ptychopariidae'
  • 'Spencia belongs to Ptychopariidae'
  • 'Spergenaspis belongs to Proetidae'
  • 'Sphaerexochus belongs to Cheiruridae'
  • 'Sphaerexochus hemicranium is recombined as Pseudosphaerexochus hemicranium'
  • 'Sphaerocoryphe belongs to Cheiruridae'
  • 'Sphaerometopus is a nomen nudum'
  • 'Sphaerophthalmella belongs to Olenidae'
  • 'Sphaerophthalmus belongs to Olenidae'
  • 'Spinagnostus is a subjective synonym of Hypagnostus'
  • 'Spinibole belongs to Proetidae'
  • 'Spinibolops belongs to Proetidae'
  • 'Spiniscutellum belongs to Styginidae'
  • 'Spinodontochile is a subjective synonym of Zlichovaspis'
  • 'Spinolimbella is a subjective synonym of Weberiphillipsia'
  • 'Spinolimbella bella is recombined as Weberiphillipsia bella'
  • 'Spinoredlichia is a subjective synonym of Pteroredlichia'
  • 'Spirantyx belongs to Alsataspididae'
  • 'Spizharaspis belongs to Trilobita'
  • 'Spizharaspis rarus belongs to Spizharaspis' according to Ergaliev 2001
  • 'Stapeleyella belongs to Trinucleidae'
  • 'Staurocephalus belongs to Encrinuridae'
  • 'Stauroholcus is a subjective synonym of Spencia'
  • 'Stegnopsis belongs to Asaphidae'
  • 'Stelckaspis belongs to Odontopleuridae'
  • 'Stella belongs to Proasaphiscidae'
  • 'Stenambon belongs to Pterocephaliidae'
  • 'Stenoblepharum belongs to Tropidocoryphidae'
  • 'Stenopareia belongs to Illaenidae'
  • 'Stenopilus belongs to Plethopeltidae'
  • 'Stenopilus convexus is recombined as Wanwanoglobus convexus'
  • 'Stenorhachis belongs to Asaphidae'
  • 'Stephanocare belongs to Damesellidae'
  • 'Stephenaspis belongs to Zacanthoididae'
  • 'Stigmacephaloides belongs to Parabolinoididae'
  • 'Stigmacephalus belongs to Dikelocephalidae'
  • 'Stigmadiscus belongs to Weymouthiidae'
  • 'Stigmaspis belongs to Saukiidae'
  • 'Stigmatoa belongs to Eulomidae'
  • 'Stiktocybele belongs to Encrinuridae'
  • 'Strenax (Sematiscus) fletcheri is recombined as Estaingia fletcheri'
  • 'Strenax cerastes is recombined as Estaingia cerastes'
  • 'Strenuaeva belongs to Ellipsocephalidae'
  • 'Strenuella belongs to Ellipsocephalidae'
  • 'Strettonia belongs to Dorypygidae'
  • 'Strictagnostus belongs to Agnostidae'
  • 'Strigambitus belongs to Pterocephaliidae'
  • 'Strigigenalis belongs to Bathyuridae'
  • 'Strotactinus belongs to Pliomeridae'
  • 'Strotocephala belongs to Plethopeltidae'
  • 'Struszia belongs to Encrinuridae'
  • 'Struveaspis belongs to Phacopidae'
  • 'Struveria belongs to Dalmanitidae'
  • 'Stubblefieldia belongs to Cheiruridae'
  • 'Stummiana belongs to Acastidae'
  • 'Stygina belongs to Styginidae'
  • 'Sudanomocarina belongs to Proasaphiscidae'
  • 'Sukhanaspis belongs to Trilobita'
  • 'Sulcatagnostus is a subjective synonym of Pseudagnostus'
  • 'Sulcocephalus belongs to Dokimocephalidae'
  • 'Suludella belongs to Conokephalinidae'
  • 'Sunaspidella belongs to Sunaspididae'
  • 'Sunina is an objective synonym of Anderssonella'
  • 'Sunwaptia belongs to Ptychaspididae'
  • 'Suriaspis belongs to Asaphidae'
  • 'Svalbardites belongs to Olenidae'
  • 'Svenax belongs to Peronopsidae'
  • 'Sycophantia belongs to Cheiruridae'
  • 'Symphysops belongs to Cyclopygidae'
  • 'Symphysurina belongs to Nileidae'
  • 'Symphysurus belongs to Nileidae'
  • 'Synhomalonotus is a subjective synonym of Neseuretus'
  • 'Synphoroides belongs to Dalmanitidae'
  • 'Syspacephalus is a subjective synonym of Ptychoparella'
  • 'Syspacheilus belongs to Marjumiidae'
  • 'Szeaspis belongs to Proasaphiscidae'
  • 'Szechuanaspis is a subjective synonym of Hebediscina'
  • 'Szechuanaspis (Zhenbadiscus) belongs to Szechuanaspis' according to Zhang and Zhang 1980
  • 'Zhenbadiscus is a subjective synonym of Hebediscina' according to Jell 1997
  • 'Szechuanaspis longispinus belongs to Szechuanaspis' according to Qian and Yao 1974
  • 'Szechuanaspis longispinus is recombined as Hebediscina longispinus' according to Jell 1997
  • 'Szechuanella is replaced by Paraszechuanella'
  • 'Szechuanolenus belongs to Estaingiidae'
  • 'Tabatopygellina belongs to Dorypygidae'
  • 'Tadakoustia belongs to Ellipsocephalidae'
  • 'Taemasaspis belongs to Odontopleuridae'
  • 'Taenicephalina belongs to Dokimocephalidae'
  • 'Taenicephalites belongs to Aphelaspididae'
  • 'Taenicephalus belongs to Parabolinoididae'
  • 'Taenora belongs to Aphelaspididae'
  • 'Tafnaspis is a subjective synonym of Carolinites'
  • 'Tagenarella belongs to Llanoaspididae'
  • 'Tagenarella eniseica belongs to Tagenarella' according to Lazarenko 1968
  • 'Taidonorus is a nomen nudum'
  • 'Taihangshania is replaced by Taihangshaniashania'
  • 'Taihangshaniashania belongs to Damesellidae'
  • 'Taihungshania belongs to Taihungshaniidae'
  • 'Taishania belongs to Remopleurididae'
  • 'Talbotina belongs to Lonchocephalidae'
  • 'Talbotinella belongs to Olenidae'
  • 'Tamaranella belongs to Aphelaspididae'
  • 'Tamdaspis belongs to Ceratopygidae'
  • 'Tangshanaspis is a subjective synonym of Missisquoia'
  • 'Tangyaia is a subjective synonym of Lisogorites'
  • 'Tankhella belongs to Proasaphiscidae'
  • 'Taoyuania belongs to Hystricuridae'
  • 'Tapinocalymene belongs to Calymenidae'
  • 'Tarayagnostus is a subjective synonym of Machairagnostus'
  • 'Tarayagnostus corrugatus is recombined as Machairagnostus corrugatus'
  • 'Tarijactinoides belongs to Calmoniidae'
  • 'Tarimella belongs to Shumardiidae'
  • 'Tarricoia belongs to Nektaspida'
  • 'Tarynaspis belongs to Namanoiidae'
  • 'Tasagnostus is a subjective synonym of Diplagnostus'
  • 'Tasmanaspis belongs to Hystricuridae'
  • 'Tasmanaspis lewisi belongs to Tasmanaspis'
  • 'Tasmanocephalus belongs to Missisquoiidae'
  • 'Tatonaspis belongs to Illaenuridae'
  • 'Tatulaspis belongs to Dokimocephalidae'
  • 'Tavsenia belongs to Menomoniidae'
  • 'Tawstockia belongs to Proetidae'
  • 'Taxioura is a subjective synonym of Ogygopsis'
  • 'Taynaella belongs to Proetidae'
  • 'Taynaella insolita belongs to Taynaella' according to Spasskij 1989
  • 'Tazemmourtia is a nomen nudum'
  • 'Tchaiaspis belongs to Conocoryphidae'
  • 'Tcherkesovia belongs to Proetidae'
  • 'Tcherkesovia prima belongs to Tcherkesovia' according to Spassky 1989
  • 'Tchernyshevioides belongs to Hebediscidae'
  • 'Tchukeraspis belongs to Asaphidae'
  • 'Tchuostachia belongs to Dokimocephalidae'
  • 'Teichertops belongs to Phacopidae'
  • 'Telaeomarrolithus belongs to Trinucleidae'
  • 'Telephina belongs to Telephinidae'
  • 'Telephus is replaced by Telephina'
  • 'Tellerina belongs to Saukiidae'
  • 'Temnoura belongs to Crepicephalidae'
  • 'Tenuipeltis belongs to Styginidae'
  • 'Terataspis belongs to Lichidae'
  • 'Termieraspis belongs to Ellipsocephalidae'
  • 'Termierella belongs to Ellipsocephalidae'
  • 'Terranovella belongs to Lonchocephalidae'
  • 'Terranovia belongs to Lichidae'
  • 'Tersella belongs to Hystricuridae'
  • 'Tesselacauda belongs to Pliomeridae'
  • 'Tetinia belongs to Proetidae'
  • 'Tetinia belongs to Warburgellinae' according to Adrain 1997
  • 'Tetralichas is a subjective synonym of Amphilichas'
  • 'Thalabaria belongs to Proetidae'
  • 'Thaleops belongs to Styginidae'
  • 'Theamataspis belongs to Styginidae'
  • 'Thebanaspis belongs to Proetidae'
  • 'Theodenisia belongs to Catillicephalidae'
  • 'Theodensia belongs to Catillicephalidae'
  • 'Thigriffides belongs to Proetidae'
  • 'Tholifrons belongs to Diceratocephalidae'
  • 'Tholus belongs to Agraulidae'
  • 'Thomastus belongs to Styginidae'
  • 'Thomondia belongs to Shumardiidae'
  • 'Thompsonaspis is a subjective synonym of Parehmania'
  • 'Thomsonaspis obscura is recombined as Parehmania obscura'
  • 'Thoracocare belongs to Zacanthoididae'
  • 'Thoralocolus belongs to Isocolidae'
  • 'Thulincola belongs to Pharostomatidae'
  • 'Thymurus belongs to Trilobita'
  • 'Thysanopeltella belongs to Styginidae'
  • 'Thysanopeltis belongs to Styginidae'
  • 'Thysanopyge belongs to Asaphidae'
  • 'Tibagya belongs to Calmoniidae'
  • 'Timoraspis belongs to Proetidae'
  • 'Tinaspis belongs to Leiostegiidae'
  • 'Tingocephalus belongs to Kaolishaniidae'
  • 'Tiresias belongs to Isocolidae'
  • 'Toernquistia belongs to Toernquistiidae'
  • 'Toernquistina belongs to Toernquistiidae'
  • 'Tolanaspis belongs to Dorypygidae'
  • 'Tolbinella belongs to Redlichiidae'
  • 'Toletanaspis belongs to Dalmanitidae'
  • 'Tollaspis belongs to Dinesidae'
  • 'Tologoja is a subjective synonym of Sinodiscus'
  • 'Tolstotchichaspis belongs to Plethopeltidae'
  • 'Tomagnostella belongs to Ptychagnostidae'
  • 'Tongshania is a subjective synonym of Douposiella'
  • 'Tongxinaspis belongs to Dionididae'
  • 'Tonkinella belongs to Oryctocephalidae'
  • 'Toragnostus is a subjective synonym of Glaberagnostus'
  • 'Torridella is a subjective synonym of Nixonella'
  • 'Tosotychia is a subjective synonym of Prohedinia'
  • 'Tostonia belongs to Eurekiidae'
  • 'Townleyella belongs to Ptychopariidae'
  • 'Toxochasmops belongs to Pterygometopidae'
  • 'Toxotis belongs to Trilobita'
  • 'Trachoparia belongs to Solenopleuridae'
  • 'Trachycheilus belongs to Alokistocaridae'
  • 'Trachylichas is an objective synonym of Dicranopeltis'
  • 'Tramoria belongs to Remopleurididae'
  • 'Trapelocera is an objective synonym of Ceratocephala'
  • 'Trapezocephalina belongs to Trilobita'
  • 'Trautensteinproetus is a subjective synonym of Xiphogonium'
  • 'Trautensteinproetus verrucatus is recombined as Xiphogonium verrucatum' according to Vaněk and Valíček 2002
  • 'Tretaspis belongs to Trinucleidae'
  • 'Treveropyge belongs to Acastidae'
  • 'Triangulaspis belongs to Ellipsocephalidae'
  • 'Triangulina is a subjective synonym of Triangulaspis'
  • 'Triarthrella belongs to Trilobita'
  • 'Triarthroides belongs to Isocolidae'
  • 'Triarthropsis belongs to Catillicephalidae'
  • 'Triarthrus belongs to Olenidae'
  • 'Tricopelta belongs to Pterygometopidae'
  • 'Tricrepicephalidae belongs to Ptychopariida'
  • 'Tricrepicephalus belongs to Tricrepicephalidae'
  • 'Trigonaspis is replaced by Trigonyangaspis'
  • 'Trigonaspis hujiaensis is recombined as Trigonyangaspis hujiaensis'
  • 'Trigonoaspis is a subjective synonym of Lisogorites'
  • 'Trigonocerca belongs to Asaphidae'
  • 'Trigonocercella belongs to Asaphidae'
  • 'Trigonyangaspis belongs to Ptychopariidae'
  • 'Trilobus belongs to Trilobita' according to Brünnich 1781
  • 'Trilobus caudatus is recombined as Dalmanites caudatus'
  • 'Trilobus caudatus belongs to Trilobus' according to Brünnich 1781
  • 'Trilobus caudatus is recombined as Dalmanites caudatus' according to Barrande 1852
  • 'Trilobus dilatatus is recombined as Ogygiocaris dilatatus'
  • 'Trimerocephalus belongs to Phacopidae'
  • 'Trimerolichas belongs to Lichidae'
  • 'Trimerus belongs to Homalonotidae'
  • 'Trinia belongs to Corynexochidae'
  • 'Trinodus belongs to Metagnostidae'
  • 'Trinucleoides belongs to Dionididae'
  • 'Trinucleus belongs to Trinucleidae'
  • 'Triplagnostus is a subjective synonym of Ptychagnostus'
  • 'Aristarius is a subjective synonym of Ptychagnostus'
  • 'Trochurus belongs to Lichidae'
  • 'Tropicoryphe belongs to Tropidocoryphidae'
  • 'Tropidocare belongs to Proetidae'
  • 'Tropidocoryphinae was reranked as the family Tropidocoryphidae and belongs to Proetida'
  • 'Tropidopyge belongs to Ceratopygidae'
  • 'Truncatometopus belongs to Pterygometopidae'
  • 'Trymataspis belongs to Lonchocephalidae'
  • 'Trypaulites belongs to Dalmanitidae'
  • 'Tschernyschewiella belongs to Proetidae'
  • 'Tsinania belongs to Tsinaniidae'
  • 'Tsunyilichas is a subjective synonym of Dicranopeltis'
  • 'Tuberaspis is a nomen nudum'
  • 'Tukalandaspis belongs to Ptychopariidae'
  • 'Tukalandaspis egens belongs to Tukalandaspis' according to Lazarenko 1968
  • 'Tumicephalus belongs to Pterocephaliidae'
  • 'Tumidulaspis belongs to Catillicephalidae'
  • 'Tungtzuella belongs to Taihungshaniidae'
  • 'Tuojiangella belongs to Catillicephalidae'
  • 'Turantyx belongs to Cheiruridae'
  • 'Turcopyge belongs to Acastidae'
  • 'Turgicephalus belongs to Styginidae'
  • 'Tuvanella belongs to Aldonaiidae'
  • 'Tympanuella belongs to Alokistocaridae'
  • 'Typhloniscus belongs to Calmoniidae'
  • 'Typhloproetus belongs to Proetidae'
  • 'Typhloproetus (Silesiops) was reranked as Silesiops and belongs to Proetidae'
  • 'Uktaspis belongs to Jakutidae'
  • 'Ullaspis belongs to Olenidae'
  • 'Ulrichaspis belongs to Ptychopariidae'
  • 'Ulugtella belongs to Illaenidae'
  • 'Uncaspis belongs to Crepicephalidae'
  • 'Unguliproetus belongs to Proetidae'
  • 'Unicapeltis belongs to Styginidae'
  • 'Uraloscutellum belongs to Styginidae'
  • 'Urbanaspis belongs to Catillicephalidae'
  • 'Uriarra belongs to Odontopleuridae'
  • 'Urjungaspis belongs to Proasaphiscidae'
  • 'Uromystrum belongs to Bathyuridae'
  • 'Ursinella belongs to Zacanthoididae'
  • 'Ushbaspis belongs to Redlichiidae'
  • 'Usovinurus belongs to Anomocaridae'
  • 'Usumunaspis belongs to Solenopleuridae'
  • 'Utaspis belongs to Alokistocaridae'
  • 'Utia belongs to Utiidae'
  • 'Utiidae belongs to Ptychopariida'
  • 'Uxunella belongs to Pterocephaliidae'
  • 'Valdaites belongs to Asaphidae'
  • 'Valenagnostus belongs to Agnostina'
  • 'Validaspis belongs to Palaeolenidae'
  • 'Valongia belongs to Cheiruridae'
  • 'Valtorresia belongs to Idahoiidae'
  • 'Vandergrachtia belongs to Proetidae'
  • 'Vanuxemella belongs to Zacanthoididae'
  • 'Varanella belongs to Raymondinidae'
  • 'Variopelta belongs to Ptychopariidae'
  • 'Varvia belongs to Nileidae'
  • 'Verditerrina belongs to Menomoniidae'
  • 'Verkholenella belongs to Asaphiscidae'
  • 'Vermontella belongs to Ptychopariidae'
  • 'Vernaculina belongs to Cedariidae'
  • 'Vicinopeltis is an objective synonym of Vicinoproetus'
  • 'Victorispina belongs to Pilekiidae'
  • 'Vidria belongs to Proetidae'
  • 'Vinicella belongs to Paradoxididae'
  • 'Vistoia is a subjective synonym of Vanuxemella'
  • 'Vittaella belongs to Proetidae'
  • 'Vittaella vitta belongs to Vittaella' according to Alberti 1976
  • 'Vogdesia belongs to Asaphidae'
  • 'Volkops belongs to Pterygometopidae'
  • 'Volkops volki belongs to Volkops' according to Struve 1959
  • 'Volocephalina belongs to Ptychopariidae'
  • 'Volonellus belongs to Aldonaiidae'
  • 'Wagnerispina belongs to Proetidae'
  • 'Waideggula belongs to Proetidae'
  • 'Waisfeldaspis belongs to Styginidae'
  • 'Walcottaspis belongs to Dikelocephalidae'
  • 'Wallacia belongs to Encrinuridae'
  • 'Walliserops belongs to Acastidae'
  • 'Wandelella belongs to Papyriaspididae'
  • 'Wangcunia belongs to Papyriaspididae'
  • 'Wangzishia belongs to Yunnanocephalidae'
  • 'Wanliangtingia is a subjective synonym of Apatokephalops'
  • 'Wanshania belongs to Ordosiidae'
  • 'Warburgella belongs to Proetidae'
  • 'Podolites is replaced by Rugulites'
  • 'Warburgella (Rugulites) was reranked as Rugulites and belongs to Proetidae'
  • 'Waribole belongs to Proetidae'
  • 'Weania belongs to Proetidae'
  • 'Weberides is a subjective synonym of Paladin'
  • 'Weberiphillipsia belongs to Proetidae'
  • 'Weberopeltis belongs to Styginidae'
  • 'Weeksina belongs to Lonchocephalidae'
  • 'Weijiaspis belongs to Ptychopariidae'
  • 'Welleraspis belongs to Catillicephalidae'
  • 'Wenkchemnia is a subjective synonym of Bathyuriscus'
  • 'Wentsuia belongs to Changshaniidae'
  • 'Westergaardella belongs to Conokephalinidae'
  • 'Westergaardia belongs to Olenidae'
  • 'Westergaardites belongs to Olenidae'
  • 'Westonaspis belongs to Phylacteridae'
  • 'Weyeraspis belongs to Proetidae'
  • 'Whittakerites belongs to Cheiruridae'
  • 'Whittardolithus belongs to Trinucleidae'
  • 'Whittingtonella belongs to Dokimocephalidae'
  • 'Whittingtonia belongs to Odontopleuridae'
  • 'Wilbernia belongs to Idahoiidae'
  • 'Wilcoxaspis belongs to Ptychaspididae'
  • 'Wilsonarella belongs to Dokimocephalidae'
  • 'Winiskia belongs to Proetidae'
  • 'Winterbergia belongs to Proetidae'
  • 'Witryides belongs to Proetidae'
  • 'Wolayella belongs to Tropidocoryphidae'
  • 'Wongia belongs to Avoninidae'
  • 'Wuhuia belongs to Dokimocephalidae'
  • 'Wujiajiania belongs to Olenidae'
  • 'Wutingshania belongs to Anomocaridae'
  • 'Wuxunaspis is a subjective synonym of Xingrenaspis'
  • 'Xanionurus is a subjective synonym of Radiaspis'
  • 'Xela belongs to Redlichiidae'
  • 'Xenadoche belongs to Proetidae'
  • 'Xenasaphus belongs to Asaphidae'
  • 'Xenoboloides belongs to Proetidae'
  • 'Xenocheilos belongs to Norwoodiidae'
  • 'Xenocybe belongs to Proetidae'
  • 'Xenocyclopyge belongs to Cyclopygidae'
  • 'Xenodechenella belongs to Proetidae'
  • 'Xenodechenella chacomaensis belongs to Xenodechenella'
  • 'Xenoredlichia belongs to Redlichiidae'
  • 'Xenostegium belongs to Asaphidae'
  • 'Xiangqianaspis belongs to Antagmidae'
  • 'Xiangzhongella belongs to Proetidae'
  • 'Xilingxia is a subjective synonym of Binodaspis'
  • 'Xingrenaspis belongs to Ptychopariidae'
  • 'Xinjiangia belongs to Raphiophoridae'
  • 'Xiphogonium belongs to Tropidocoryphidae'
  • 'Xishuiella is a subjective synonym of Drepanuroides'
  • 'Xishuiella is a subjective synonym of Drepanuroides' according to W. Zhang et al. 1997
  • 'Xiuqiella [misspelled as Xuigiella] belongs to Corynexochida' according to Sepkoski 2002
  • 'Xiuqiella belongs to Chengkouiidae'
  • 'Xiushuilithus belongs to Trinucleidae'
  • 'Xylabion belongs to Cheiruridae'
  • 'Xyoeax belongs to Styginidae'
  • 'Xystocrania belongs to Cheiruridae'
  • 'Xystridura belongs to Xystridurinae'
  • 'Yabeia belongs to Solenopleuridae'
  • 'Yanhaoia [misspelled as Yankaoia] belongs to Pterygometopidae'
  • 'Yanshanaspis belongs to Proetidae'
  • 'Yanshanaspis yanshanensis belongs to Yanshanaspis' according to Luo and Jiang 1985
  • 'Yeshanaspis belongs to Ellipsocephalidae'
  • 'Yichangaspis belongs to Proetidae'
  • 'Yichangaspis yichangensis belongs to Yichangaspis' according to Xiang and Zhou 1987
  • 'Yiliangellina belongs to Gigantopygidae'
  • 'Yinganaspis belongs to Shumardiidae'
  • 'Yinites belongs to Yinitidae'
  • 'Yohoaspis belongs to Ptychopariidae'
  • 'Yongwolia belongs to Anomocaridae'
  • 'Yorkella belongs to Redlichiidae'
  • 'Yosimuraspis belongs to Remopleurididae'
  • 'Youngia belongs to Cheiruridae'
  • 'Yuehsienszella belongs to Antagmidae'
  • 'Yuepingia is a subjective synonym of Haniwoides'
  • 'Yuknessaspis belongs to Ptychopariidae'
  • 'Yukonaspis belongs to Catillicephalidae'
  • 'Yukonia belongs to Yukoniidae'
  • 'Yukonides belongs to Yukoniidae'
  • 'Yumenaspis belongs to Alsataspididae'
  • 'Yunnanaspidella belongs to Yinitidae'
  • 'Yunnanaspis belongs to Yinitidae'
  • 'Yunnanocephalidae belongs to Ptychopariida'
  • 'Yunnanocephalus belongs to Yunnanocephalidae'
  • 'Yurakia belongs to Illaenuridae'
  • 'Zacanthoides belongs to Zacanthoididae'
  • 'Zacanthopsis belongs to Zacanthoididae'
  • 'Zacompsus belongs to Alsataspididae'
  • 'Zaplaops belongs to Phacopidae'
  • 'Zazvorkaspis belongs to Cheiruridae'
  • 'Zbirovia belongs to Illaenidae'
  • 'Zdicella belongs to Illaenidae'
  • 'Zeliszkella belongs to Dalmanitidae'
  • 'Zetaproetus belongs to Tropidocoryphidae'
  • 'Zeteagnostus is a subjective synonym of Ptychagnostus'
  • 'Zethus rex is recombined as Atractopyge rex' according to Hennigsmoen 1959
  • 'Zethus rex belongs to Zethus' according to Nieskowski 1857
  • 'Zethus rex is recombined as Cybelella rex' according to Reed 1928
  • 'Zetillaenus belongs to Illaenidae'
  • 'Zhegangula belongs to Proetidae'
  • 'Zhenbaspis belongs to Chengkouiidae'
  • 'Zhenganites belongs to Asaphidae'
  • 'Zhifangia is a subjective synonym of Pudoproetus'
  • 'Zhujia belongs to Tsinaniidae'
  • 'Zhuozishania is a subjective synonym of Lioparella'
  • 'Zhuxiella is a subjective synonym of Hsuaspis'
  • 'Zigzuella is a nomen dubium'
  • 'Zlichovaspis belongs to Dalmanitidae'
  • 'Zuninaspis belongs to Asaphidae'