Opinions from H. B. Whittington et al. 1997

  • 'Abadiella belongs to Abadiellidae'
  • 'Abadiellidae belongs to Redlichiida'
  • 'Abakolia belongs to Weymouthiidae'
  • 'Acadagnostus belongs to Diplagnostidae'
  • 'Acadoparadoxides belongs to Paradoxididae'
  • 'Acastidae belongs to Phacopida'
  • 'Acidiscus belongs to Weymouthiidae'
  • 'Acimetopus belongs to Weymouthiidae'
  • 'Acmarhacis is a misspelling of Acmarhachis'
  • 'Acmarhachis belongs to Agnostidae'
  • 'Acrocephalitidae belongs to Ptychopariida'
  • 'Aculeodiscus is a subjective synonym of Dawsonia'
  • 'Agnostardis belongs to Agnostidae'
  • 'Agnostida belongs to Trilobita'
  • 'Agnostidae belongs to Agnostida'
  • 'Agnostotes belongs to Diplagnostidae'
  • 'Agnostus belongs to Agnostidae'
  • 'Agraulidae belongs to Ptychopariida'
  • 'Alaskadiscus belongs to Yukoniidae'
  • 'Alsataspididae belongs to Asaphida'
  • 'Ammagnostus belongs to Agnostidae'
  • 'Analox belongs to Weymouthiidae'
  • 'Andalusiana belongs to Holmiidae'
  • 'Anglagnostus belongs to Metagnostidae'
  • 'Anomocaridae belongs to Asaphida'
  • 'Anopolenus belongs to Centropleuridae'
  • 'Archaeaspididae belongs to Redlichiida'
  • 'Archaeaspis belongs to Archaeaspididae'
  • 'Arcuolenellus belongs to Olenellidae'
  • 'Arthrorhachis belongs to Metagnostidae'
  • 'Asaphidae belongs to Asaphida'
  • 'Asaphiscidae belongs to Ptychopariida'
  • 'Aspidagnostus belongs to Clavagnostidae'
  • 'Aulacopleuridae belongs to Proetida'
  • 'Balcoracania belongs to Emuellidae'
  • 'Baltagnostus belongs to Diplagnostidae'
  • 'Bathycheilidae belongs to Phacopida'
  • 'Bathydiscus belongs to Weymouthiidae'
  • 'Bathyuridae belongs to Proetida'
  • 'Biceratops belongs to Olenellidae'
  • 'Bohemillidae belongs to Asaphida'
  • 'Bolaspididae belongs to Ptychopariida'
  • 'Bolbolenellus belongs to Olenellidae'
  • 'Bolboparia belongs to Weymouthiidae'
  • 'Bondonella belongs to Neltneriidae'
  • 'Bradyfallotaspis belongs to Archaeaspididae'
  • 'Bristolia belongs to Olenellidae'
  • 'Bulaiaspis belongs to Chengkouaspidae'
  • 'Callavia belongs to Holmiidae'
  • 'Calmoniidae belongs to Phacopida'
  • 'Calodiscidae belongs to Agnostida'
  • 'Calodiscus belongs to Calodiscidae'
  • 'Calymenidae belongs to Phacopida'
  • 'Cambropallas belongs to Holmiidae'
  • 'Catillicephalidae belongs to Ptychopariida'
  • 'Cedariidae belongs to Ptychopariida'
  • 'Centropleura belongs to Centropleuridae'
  • 'Centropleuridae belongs to Redlichiida'
  • 'Cephalopyge belongs to Weymouthiidae'
  • 'Ceratopygidae belongs to Asaphida'
  • 'Cheilocephalidae belongs to Corynexochida'
  • 'Cheiruridae belongs to Phacopida'
  • 'Chengkouaspidae belongs to Redlichiida'
  • 'Choubertella belongs to Fallotaspididae'
  • 'Clarella belongs to Centropleuridae'
  • 'Clavagnostidae belongs to Agnostida'
  • 'Clavagnostus belongs to Clavagnostidae'
  • 'Cobboldites belongs to Weymouthiidae'
  • 'Condylopyge belongs to Condylopygidae'
  • 'Condylopygidae belongs to Agnostida'
  • 'Connagnostus belongs to Agnostidae'
  • 'Conocoryphidae belongs to Ptychopariida'
  • 'Corrugatagnostus belongs to Metagnostidae'
  • 'Corynexochidae belongs to Corynexochida'
  • 'Costadiscus is a subjective synonym of Abakolia'
  • 'Cotalagnostus belongs to Spinagnostidae'
  • 'Crepicephalidae belongs to Ptychopariida'
  • 'Cyclopygidae belongs to Asaphida'
  • 'Daguinaspis belongs to Fallotaspididae'
  • 'Dalmanitidae belongs to Phacopida'
  • 'Damesellidae belongs to Lichida'
  • 'Dawsonia belongs to Eodiscidae'
  • 'Delgadella belongs to Hebediscidae'
  • 'Denagnostus belongs to Diplagnostidae'
  • 'Diceratocephalidae belongs to Ptychopariida'
  • 'Dimeropygidae belongs to Proetida'
  • 'Dinesidae belongs to Corynexochida'
  • 'Dionididae belongs to Asaphida'
  • 'Diplagnostidae belongs to Agnostida'
  • 'Diplagnostus belongs to Diplagnostidae'
  • 'Diplorrhina belongs to Peronopsidae'
  • 'Dolerolenidae belongs to Redlichiida'
  • 'Dolerolenus belongs to Dolerolenidae'
  • 'Dolichometopidae belongs to Corynexochida'
  • 'Doryagnostus belongs to Spinagnostidae'
  • 'Dorypygidae belongs to Corynexochida'
  • 'Eccaparadoxides belongs to Paradoxididae'
  • 'Edelsteinaspididae belongs to Corynexochida'
  • 'Ekwipagetia belongs to Yukoniidae'
  • 'Elganellus belongs to Redlichiida'
  • 'Ellipsocephalidae belongs to Ptychopariida'
  • 'Elliptocephala is corrected as Elliptocephalus and belongs to Holmiidae'
  • 'Elviniidae belongs to Ptychopariida'
  • 'Emuellidae belongs to Redlichiida'
  • 'Emuelloidea belongs to Redlichiina'
  • 'Encrinuridae belongs to Phacopida'
  • 'Eoagnostus belongs to Spinagnostidae'
  • 'Eodiscidae belongs to Agnostida'
  • 'Eodiscus belongs to Eodiscidae'
  • 'Eodiscus (Serrodiscus) was reranked as Serrodiscus and belongs to Weymouthiidae'
  • 'Eofallotaspis belongs to Fallotaspididae'
  • 'Eops belongs to Saukiandidae'
  • 'Eoredlichia belongs to Redlichiidae'
  • 'Esmeraldina belongs to Holmiidae'
  • 'Eurekiidae belongs to Asaphida'
  • 'Fallagnostus is a subjective synonym of Condylopyge'
  • 'Fallotaspididae belongs to Redlichiida'
  • 'Fallotaspis belongs to Fallotaspididae'
  • 'Fremontella belongs to Olenellidae'
  • 'Gabriellus belongs to Olenellidae'
  • 'Galbagnostus belongs to Metagnostidae'
  • 'Geragnostella belongs to Metagnostidae'
  • 'Geragnostus belongs to Metagnostidae'
  • 'Geraldinella belongs to Archaeaspididae'
  • 'Girvanagnostus is a subjective synonym of Arthrorhachis'
  • 'Glyptagnostus belongs to Agnostidae'
  • 'Goniagnostus belongs to Ptychagnostidae'
  • 'Gymnagnostus belongs to Agnostidae'
  • 'Hadragnostus belongs to Agnostidae'
  • 'Hebediscidae belongs to Agnostida'
  • 'Hebediscus belongs to Hebediscidae'
  • 'Holmia belongs to Holmiidae'
  • 'Holmiella belongs to Holmiidae'
  • 'Holmiidae belongs to Redlichiida'
  • 'Holotrachelidae belongs to Proetida'
  • 'Homagnostoides belongs to Metagnostidae'
  • 'Homalonotidae belongs to Phacopida'
  • 'Hungaiidae belongs to Asaphida'
  • 'Hupeidiscus is a subjective synonym of Tsunyidiscus'
  • 'Hydrocephalus belongs to Paradoxididae'
  • 'Hypagnostus belongs to Spinagnostidae'
  • 'Hyperagnostus is a subjective synonym of Neoagnostus'
  • 'Idahoiidae belongs to Asaphida'
  • 'Illaenidae belongs to Corynexochida'
  • 'Illaenuridae belongs to Corynexochida'
  • 'Inella belongs to Chengkouaspidae'
  • 'Innitagnostus belongs to Agnostidae'
  • 'Iyouella belongs to Holmiidae'
  • 'Jakutidae belongs to Corynexochida'
  • 'Judomia belongs to Judomiidae'
  • 'Judomiidae belongs to Redlichiida'
  • 'Kaolishaniidae belongs to Corynexochida'
  • 'Kerberodiscus is a subjective synonym of Leptochilodiscus'
  • 'Kingstoniidae belongs to Ptychopariida'
  • 'Kjerulfia belongs to Holmiidae'
  • 'Kormagnostus belongs to Agnostidae'
  • 'Kuanyangia belongs to Redlichiidae'
  • 'Ladadiscus is a subjective synonym of Mallagnostus'
  • 'Laudonia belongs to Olenellidae'
  • 'Leiostegiidae belongs to Corynexochida'
  • 'Lejopyge belongs to Ptychagnostidae'
  • 'Lemdadella belongs to Redlichiidae'
  • 'Leptochilodiscus belongs to Weymouthiidae'
  • 'Lichakephalidae belongs to Lichida'
  • 'Lichidae belongs to Lichida'
  • 'Linguagnostus belongs to Diplagnostidae'
  • 'Liostracinidae belongs to Asaphida'
  • 'Lisaniidae belongs to Ptychopariida'
  • 'Lisogoragnostus belongs to Phalacromidae'
  • 'Litagnostus belongs to Diplagnostidae'
  • 'Lonchocephalidae belongs to Ptychopariida'
  • 'Lorenzellidae belongs to Ptychopariida'
  • 'Lotagnostus belongs to Agnostidae'
  • 'Luhops belongs to Centropleuridae'
  • 'Macannaia belongs to Eodiscidae'
  • 'Mallagnostus belongs to Weymouthiidae'
  • 'Marjumiidae belongs to Ptychopariida'
  • 'Menneraspidae belongs to Redlichiida'
  • 'Menneraspis belongs to Menneraspidae'
  • 'Menomoniidae belongs to Ptychopariida'
  • 'Metagnostidae belongs to Agnostida'
  • 'Micragnostus belongs to Agnostidae'
  • 'Mummaspis belongs to Olenellidae'
  • 'Nahannagnostus belongs to Diplagnostidae'
  • 'Neltneria belongs to Neltneriidae'
  • 'Neltneriidae belongs to Redlichiida'
  • 'Neoagnostus belongs to Diplagnostidae'
  • 'Neocobboldia belongs to Calodiscidae'
  • 'Neopagetina belongs to Hebediscidae'
  • 'Nephrolenellus belongs to Olenellidae'
  • 'Neptunagnostella is a subjective synonym of Geragnostus'
  • 'Nevadella belongs to Nevadiidae'
  • 'Nevadia belongs to Nevadiidae'
  • 'Nevadiidae belongs to Redlichiida'
  • 'Nileidae belongs to Asaphida'
  • 'Norwoodiidae belongs to Ptychopariida'
  • 'Odontopleuridae belongs to Lichida'
  • 'Oedorhachis belongs to Diplagnostidae'
  • 'Oidalagnostus belongs to Diplagnostidae'
  • 'Olenellida is a subjective synonym of Olenellina'
  • 'Olenellidae belongs to Redlichiida'
  • 'Olenellus belongs to Olenellidae'
  • 'Olenidae belongs to Ptychopariida'
  • 'Oncagnostus belongs to Agnostidae'
  • 'Onymagnostus belongs to Ptychagnostidae'
  • 'Opsidiscus belongs to Eodiscidae'
  • 'Oryctocephalidae belongs to Corynexochida'
  • 'Paedumias is a misspelling of Paedeumias'
  • 'Pagetia belongs to Eodiscidae'
  • 'Pagetides belongs to Eodiscidae'
  • 'Pagetiellus is a subjective synonym of Delgadella'
  • 'Pagodiidae belongs to Corynexochida'
  • 'Palmettaspis belongs to Holmiidae'
  • 'Papyriaspididae belongs to Ptychopariida'
  • 'Parabolinoididae belongs to Asaphida'
  • 'Paradoxididae belongs to Redlichiida'
  • 'Parafallotaspis belongs to Fallotaspididae'
  • 'Paranevadella belongs to Judomiidae'
  • 'Peachella belongs to Olenellidae'
  • 'Pentagnostus belongs to Ptychagnostidae'
  • 'Peratagnostus belongs to Spinagnostidae'
  • 'Peronopsella belongs to Peronopsidae'
  • 'Peronopsidae belongs to Agnostida'
  • 'Peronopsis belongs to Peronopsidae'
  • 'Perrector belongs to Saukiandidae'
  • 'Phacopidae belongs to Phacopida'
  • 'Phacops (Nephranops) incisus dillanus is recombined as Nephranops dillanus' according to Richter and Richter 1926
  • 'Phalacroma belongs to Phalacromidae'
  • 'Phalacromidae belongs to Agnostida'
  • 'Phoidagnostoides is a subjective synonym of Leiagnostus'
  • 'Pilekiidae belongs to Phacopida'
  • 'Platagnostus is a subjective synonym of Phalacroma'
  • 'Plethopeltidae belongs to Ptychopariida'
  • 'Pleuroctenium belongs to Condylopygidae'
  • 'Pliomeridae belongs to Phacopida'
  • 'Poletaevella belongs to Redlichiida'
  • 'Proagnostus belongs to Agnostidae'
  • 'Proasaphiscidae belongs to Ptychopariida'
  • 'Profallotaspis belongs to Fallotaspididae'
  • 'Prosopiscidae belongs to Phacopida'
  • 'Pseudagnostus belongs to Diplagnostidae'
  • 'Pseudoperonopsis belongs to Spinagnostidae'
  • 'Pseudorhaptagnostus is a subjective synonym of Neoagnostus'
  • 'Pterocephaliidae belongs to Asaphida'
  • 'Pterygometopidae belongs to Phacopida'
  • 'Ptychagnostidae belongs to Agnostida'
  • 'Ptychagnostus belongs to Ptychagnostidae'
  • 'Ptychaspididae belongs to Asaphida'
  • 'Ptychopariidae belongs to Ptychopariida'
  • 'Quadrahomagnostus belongs to Agnostidae'
  • 'Raphiophoridae belongs to Asaphida'
  • 'Raymondinidae belongs to Ptychopariida'
  • 'Redlichia belongs to Redlichiinae'
  • 'Redlichiida belongs to Trilobita'
  • 'Redlichiidae belongs to Redlichiida'
  • 'Redlichiinae belongs to Redlichiidae'
  • 'Redlichina belongs to Redlichinidae'
  • 'Redlichinidae belongs to Redlichiida'
  • 'Redlichioidea belongs to Redlichiina'
  • 'Rejkocephalus is a subjective synonym of Hydrocephalus'
  • 'Remopleurididae belongs to Asaphida'
  • 'Rhyssometopidae belongs to Asaphida'
  • 'Runcinodiscus belongs to Weymouthiidae'
  • 'Sajanaspis belongs to Redlichinidae'
  • 'Saukianda belongs to Saukiandidae'
  • 'Saukiandidae belongs to Redlichiida'
  • 'Saukiidae belongs to Asaphida'
  • 'Schmidtiellus belongs to Holmiidae'
  • 'Segmentagnostus is a subjective synonym of Corrugatagnostus'
  • 'Shumardiidae belongs to Ptychopariida'
  • 'Sibiriaspis belongs to Abadiellidae'
  • 'Sinodiscus belongs to Calodiscidae'
  • 'Solenopleuridae belongs to Ptychopariida'
  • 'Sphaeragnostidae belongs to Agnostida'
  • 'Sphaeragnostus belongs to Sphaeragnostidae'
  • 'Spinagnostidae belongs to Agnostida'
  • 'Spinagnostiidae is a misspelling of Spinagnostidae'
  • 'Spinagnostus is a subjective synonym of Hypagnostus'
  • 'Styginidae belongs to Corynexochida'
  • 'Tannudiscus belongs to Weymouthiidae'
  • 'Telephinidae belongs to Proetida'
  • 'Terechtaspis belongs to Chengkouaspidae'
  • 'Tomagnostella belongs to Spinagnostidae'
  • 'Tomagnostus belongs to Ptychagnostidae'
  • 'Trilobagnostus belongs to Agnostidae'
  • 'Trinodus belongs to Metagnostidae'
  • 'Trinucleidae belongs to Asaphida'
  • 'Tsinaniidae belongs to Corynexochida'
  • 'Tsunyidiscidae belongs to Agnostida'
  • 'Tsunyidiscus belongs to Tsunyidiscidae'
  • 'Tungusella belongs to Redlichinidae'
  • 'Utagnostus belongs to Clavagnostidae'
  • 'Vinicella is a subjective synonym of Paradoxides'
  • 'Wanneria belongs to Olenellidae'
  • 'Weymouthia belongs to Weymouthiidae'
  • 'Weymouthiidae belongs to Agnostida'
  • 'Wutingaspis belongs to Redlichiidae'
  • 'Xestagnostus belongs to Diplagnostidae'
  • 'Xystridurinae belongs to Redlichiida'
  • 'Yinitidae belongs to Redlichioidea'
  • 'Yukoniidae belongs to Agnostida'
  • 'Zacanthoididae belongs to Corynexochida'