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Hymenostraca

Taxonomy
Hymenostraca was named by Rolfe (1969).

It was reranked as the unranked clade Hymenostraca by Hegna et al. (2020).

It was assigned to Malacostraca by Bengtson (1992) and Sepkoski (2002); and to Pancrustacea by Hegna et al. (2020).

Synonymy list
YearName and author
1969Hymenostraca Rolfe
1992Hymenostraca Bengtson p. 1022
2002Hymenostraca Sepkoski
2020Hymenostraca Hegna et al. p. 23

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Ecdysozoa
Panarthropoda
RankNameAuthor
phylumArthropodaLatreille 1829
Deuteropoda
Mandibulata
PancrustaceaZrzavý and Štys 1997
Hymenostraca(Rolfe 1969)
Hymenostraca(Rolfe 1969)

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Unr. †Hymenostraca Rolfe 1969
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G. †Branchiocaris Briggs 1976
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Branchiocaris malongensis Luo et al. 2008
Branchiocaris pretiosa Resser 1929
Branchiocaris xundianensis Luo et al. 2008
Branchiocaris yiliangensis Luo et al. 2008
G. †Ercaicunia Luo et al. 1999
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Ercaicunia multinodosa Luo et al. 1999
G. †Hymenocaris Salter 1853
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Hymenocaris dubia Resser and Howell 1938
Supercl. Multicrustacea Regier et al. 2010
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Or. †Cyclida Glaessner 1928
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Fm. †Alsasuacaridae van Bakel et al. 2011
+
G. †Alsasuacaris van Bakel et al. 2011
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Alsasuacaris nostradama van Bakel et al. 2011
G. †Maastrichtiocaris Fraaije et al. 2003
+
Maastrichtiocaris rostratus Fraaije et al. 2003
Fm. †Americlidae Dzik 2008
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G. †Americlus Dzik 2008
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Americlus americanus Packard 1885
Americlus limbatus Rogers 1902
Americlus packardi Rogers 1902
Americlus rankini Woodward 1868
G. †Brittaniclus Schweitzer et al. 2020
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Brittaniclus rankini Woodward 1868
Brittaniclus scotti Woodward 1893
Brittaniclus testudo Peach 1882
G. †Dziklus Schweitzer et al. 2020
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Dziklus obesus Schram et al. 1997
G. †Anhelkocephalon Bill 1914
+
Fm. †Cyclidae Packard 1885
+
G. †Ambocyclus Schweitzer et al. 2020
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Ambocyclus capidulum Chernyshev 1935
Ambocyclus minutus Rogers 1902
Ambocyclus simulans Reed 1908
G. †Apionicon Schram et al. 1997
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Apionicon apioides Schram et al. 1997
G. †Carabicyclus Schweitzer et al. 2020
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Carabicyclus wrighti Woodward 1870
G. †Chernyshevine Schweitzer et al. 2020
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Chernyshevine spinosus Chernyshev 1933
G. †Cyclus de Koninck 1841
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Cyclus radialis Phillips 1836
Cyclus rankini Woodward 1869
G. †Litocyclus Schweitzer et al. 2020
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Litocyclus bilobatus Woodward 1870
Litocyclus communis Rogers 1902
Litocyclus jonesianus Woodward 1870
Litocyclus permarginatus Rogers 1902
Litocyclus torosus Woodward 1870
G. †Magnitocyclus Mychko et al. 2022
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Magnitocyclus struveae Mychko et al. 2022
G. †Prolatcyclus Mychko et al. 2019
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Prolatcyclus kindzadza Mychko et al. 2019
Prolatcyclus martinensis Goldring 1967
G. †Tazawacyclus Schweitzer et al. 2020
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Tazawacyclus tazawai Schweitzer et al. 2020
G. †Uralocyclus M and Alekseev 2018
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Uralocyclus harknessi Woodward 1870
Uralocyclus miloradovitchi Kramarenko 1961
Uralocyclus woodwardi Reed 1893
Fm. †Halicynidae Gall and Grauvogel 1967
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G. †Carcinaspides Glaessner 1969
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Carcinaspides pustulosus Schafautl 1863
G. †Halicyne von Meyer 1844
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Halicyne agnota von Meyer 1838
Halicyne laxa von Meyer 1847
Halicyne montanaensis Schram et al. 2006
Halicyne oosterinkorum Schweitzer et al. 2019
Halicyne ornata Trümpy 1957
Halicyne plana von Seebach 1857
Halicyne silesiensis Alexandrowicz 1973
G. †Juracyclus Schweigert 2007
Fm. †Hemitrochiscidae Trauth 1918
+
G. †Cyclocarcinides Glaessner 1969
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Cyclocarcinides serratus Stolley 1914
Invalid names: Cyclocarcinus Stolley 1914 [replaced]
G. †Hemitrochiscus von Schauroth 1854
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Hemitrochiscus paradoxus von Schauroth 1854
G. †Oonocarcinus Gemmellaro 1890
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Oonocarcinus insignis Gemmellaro 1890
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Invalid names: Oonocarcinus anceps Gemmellaro 1890 [synonym], Oonocarcinus geinitzi Gemmellaro 1890 [synonym]
G. †Paraprosopon Gemmellaro 1890
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Paraprosopon reussi Gemmellaro 1890
G. †Skuinocyclus Mychko and Alekseev 2018
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Skuinocyclus juliae Mychko and Alekseev 2018
Fm. †Schraminidae Dzik 2008
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G. †Opolanka Dzik 2008
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Opolanka decorosa Dzik 2008
G. †Schramine Dzik 2008
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Schramine gondwanae Brambilla et al. 2002
Schramine madagascariensis Brambilla et al. 2002
Schramine mamoroi Pasini and Garassino 2007
Schramine max Schram et al. 1997
Schramine montanaensis Schram et al. 2006
G. †Yunnanocyclus Feldmann et al. 2017
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Yunnanocyclus nodosus Feldmann et al. 2017
Cl. Hexanauplia Oakley et al. 2013
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Subcl. Copepoda Milne-Edwards,Milne-Edwards 1840 [copepod]
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G. Cletocamptus Schmankevitch 1875
Or. Harpacticoida Sars 1903
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Invalid names: Cletodidae Scott 1904 [empty], Ectinosomatidae Sars 1903 [empty]
Infracl. Neocopepoda Huys and Boxshall 1991
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Superor. Gymnoplea Giesbrecht 1882
Superor. Podoplea Giesbrecht 1992
Infracl. Progymnoplea Lang 1948
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Invalid names: Platycopioida Fosshagen 1985 [empty]
G. Sphaerothylacus Sluiter 1884
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Cl. Malacostraca Latreille 1802
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G. †Amphipeltis Salter 1863
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Amphipeltis paradoxus Salter 1863
Subcl. Eumalacostraca Grobben 1892
+
Unr. Caridoida Hessler 1982
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Or. Anaspidacea Calman 1904
Or. Decapoda Latreille 1802 [decapod]
Or. Euphausiacea Dana 1852
Superor. Peracarida Calman 1904
Invalid names: Eucarida Calman 1904 [invalid subgroup], Syncarida Packard 1885 [invalid subgroup]
Superor. †Eocarida Brooks 1962
+
Or. †Eocaridacea Brooks 1962
G. †Peachocaris Schram 1976
Infracl. Hoplocarida Calman 1904
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Or. †Aeschronectida Schram 1969
Or. †Palaeostomatopoda Brooks 1962
Or. Stomatopoda Latreille [mantis shrimp]
Invalid names: Perimecturus pattoni Peach 1908 [nomen dubium]
G. †Joanellia Schram 1979
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Joanellia elegans Peach 1883
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Invalid names: Crangopsis minuta Peach 1908 [synonym], Crangopsis robusta Peach 1908 [synonym]
Joanellia lundi Schram and Schram 1979
Fm. †Mesoprosopidae Glaessner 1928
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G. †Mesoprosopon Stolley 1914
G. †Schramocaris Clark et al. 2016
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Schramocaris gilljonesorum Clark et al. 2016
Invalid names: Percarida Calman 1904 [empty]
G. †Naranda Muenster 1842
Subcl. Phyllocarida Packard 1879
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Or. †Archaeostraca Claus 1888
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G. †Arenosicaris Collette and Hagadorn 2010
Subor. †Caryocaridina Collette and Hagadorn 2010
Subor. †Ceratiocaridina Clark 1900
G. †Dictyocaris Salter 1860
Subor. †Echinocaridina Clarke 1900
G. †Emmelezoe Jones and Woodward 1886
Subor. †Palaeopemphida Feldmann et al. 2004
Subor. †Pephricaridina
Subor. †Rhinocaridina
Subor. †Rhinocarina Clarke 1900
G. †Coreocaris Kobayashi 1937
G. †Dioxycaris Gurich 1929
Subor. †Discinocarina Clarke 1900
+
Fm. †Discinocarididae Etheridge et al. 1885
Fm. †Peltocarididae Clarke 1900
G. †Galenocaris Wells 1944
Or. †Hoplostraca Schram 1973
+
Fm. †Sairocarididae Schram 1973
Or. Leptostraca Claus 1880
+
G. †Cascolus Siveter et al. 2017
G. Levinebalia Walker-Smith 2000
Fm. Nebaliidae Baird 1850
Fm. †Rhabdouraeidae Schram and Malzahn 1984
G. Nebaliella Thiele 1904
G. †Nothozoe Barrande 1868
G. †Phasganocaris Novak 1886
+
Phasganocaris pugio Barrande 1872
G. †Saccocaris Salter 1868
G. †Shafferia
Invalid names: Aristocaris [invalid subgroup]
Invalid names: Belotelsonidea Schram 1981 [empty], Waterstonellidea [empty]
G. †Nereocaris Legg et al. 2012
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Nereocaris exilis Legg et al. 2012
Supercl. Oligostraca Zrzavý et al. 1997
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Cl. Ichthyostraca Zrzavý et al. 1997
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Subcl. Branchiura Thorell 1864
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Invalid names: Arguloida Yamaguti 1963 [empty]
Subcl. Pentastomida Diesing 1836
+
+
Boeckelericambria pelturae Waloszek and Mueller 1994
Or. Cephalobaenida Heymons 1935
+
G. †Invavita Siveter et al. 2015
Invalid names: Porocephalida Heymons 1935 [empty]
Invalid names: Mystacocarida Pennak and Zinn 1943 [empty]
Cl. Ostracoda Latreille 1802 [ostracod]
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G. †Acanthomeridion Hou et al. 1989
G. †Acrossula
G. †Anfedatia
G. †Aurilia
Or. †Beyrichiocopa Pokorný 1954
+
Subor. †Binodicopa Schallreuter 1972
+
Superfm. †Drepanellacea Ulrich and Bassler 1923
G. †Biaurina
G. †Brasacypris Krömmelbein 1965
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Brasacypris fulfaroi Dias-Brito et al. 2001
Brasacypris morigerata Musacchio 1973
G. †Bullaluta
Fm. †Buregiidae Polenova 1953
+
G. †Buregia
G. †Bursulella Jones 1961
G. †Cedocamia
G. Cyclocypris Brady and Norman 1889
G. Cyprinotus Brady 1886
+
Cyprinotus salinus Brady 1868
G. Cytheropsis Sars 1866
G. †Damaoella
G. †Dhrumaella Manivit and Vaslet 1987
G. †Dorispina
G. †Flemingia
G. †Galeopsis Hinz-Schallreuter 1993
G. †Gerdalia Belousova 1961
G. Glossicythereis Benson 1974
G. Heterocypris Claus 1893
G. †Hupehella
G. †Ivaria
G. †Koilocythere Deltel 1963
G. †Kuiperiana Bassiouni 1962
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Kuiperiana latissima Brady 1878
Or. †Limbatulocopida Abushik 1990
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Fm. †Dolborellidae Melnikova 1976
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G. †Costoprimites Ivanova 1960
Or. †Metacopida Sylvester-Bradley 1961
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G. †Acuprisma
G. †Diura
G. †Heterma
G. †Planoria
G. †Tumidella
G. †Moorea
Subcl. Myodocopa Sars 1866
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Or. Halocyprida Dana 1853
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Subor. †Entomozocopina Gründel 1969
Subor. Halocypridina Dana 1853
+
Invalid names: Thaumatocypridina Kozur 1989 [synonym]
Or. †Leperditicopida Scott 1961
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G. †Bingeria Martinsson 1962
G. †Chevroleperditia Swartz 1949
G. †Dalelina Sun 1978
G. †Eomoelleritia Abushik 1972
G. †Holtedahlites Solle 1936
Fm. †Isochilinidae Swartz 1949
G. †Ivia Schallreuter 1984
Fm. †Leperditiidae Jones 1856
G. †Paraeoleperditia Adachi and Igo 1980
G. †Tollita
G. †Yokopsis
Or. Myodocopida Sars 1866
+
G. †Calocaria
Subor. Cladocopina Sars 1866
G. †Luprisca Siveter et al. 2014
Subor. Myodocopina Sars 1866
Superfm. †Nymphatelinoidea Siveter et al. 2007
Subor. †Paleomyodocopina Kornicker and Sohn 2000
Superor. †Myodocopomorpha Kozur 1972
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Or. †Cypridinida Skogsberg 1920
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Superfm. †Bolbozooidea Boucek 1936
Fm. †Bouciidae Pribyl 1951
Superfm. †Cyprelloidea Sylvester-Bradley 1961
G. Neoatlanticythere Benson 1974
G. †Netzkaina
Superor. †Palaecopamorphes Abushik 1990
+
Or. †Beyrichicopida Pokorný 1954
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Subor. †Binodicopina Schallreuter 1972
Subor. †Palaeocopina Henningsmoen 1953
Subor. †Paraparchitocopina Gramm 1975
Or. †Hollinocopida Henningsmoen 1965
+
Subor. †Hollinocopina Swartz 1936
Subor. †Primitiopsicopina Schallreuer 1986
Invalid names: Sylthiidae Schallreuter 1982 [empty]
Or. †Leperditellocopida Abushik 1990
+
Subor. †Leiocopina Schallreuter 1973
Subor. †Leperditellocopina Abushik 1990
Fm. †Schmidtellidae Neckaja 1966
Invalid names: Eridocopida Adamczak 1961 [empty]
Subor. †Paleocopa Henningsmoen 1953
+
Superfm. †Beyrichiacea Matthew 1886
+
Fm. †Acronotellidae Swartz 1936
G. †Gillatia Opik 1953
G. †Novakina
Fm. †Zygobolbidae Bassler 1923
Invalid names: Uncertain [empty]
Invalid names: Leperditiacea Bassler and Kellett 1934 [empty]
G. †Paleodarwinula Molostovskaya 1990
G. †Phasoia
Subcl. Podocopa Sars 1865
+
G. †Cetollina Shi 2002
+
G. †Eumiraculum Chen 1987
+
Eumiraculum desmaresae Forel 2013
Eumiraculum mettei Gliwa 2020
Or. Palaeocopida Henningsmoen 1953
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G. †Airina
G. †Aitilia
G. †Ajchalina
G. †Antiaechmia Schallreuter 1968
G. †Ardennea
G. †Arsiriina
G. †Barrosina
Subor. †Beyrichicopina Scott 1961
G. †Binodina
G. †Borcobolbina Ivanova 1979
G. †Bucerella
G. †Cavhithis
G. †Cemalia Özdikmen 2010
+
Invalid names: Delosia Gailite 1967 [replaced]
G. †Circulina Sepkoski 2002
G. †Cubitosulcus Tilman 1984
G. †Dawania
G. †Decorella
G. †Deefgella
G. †Dominina
G. †Edenopsis
G. †Ehlersia Kesling et al. 1960
G. †Eochilina
Subor. †Eridostracina Adamczak 1961
G. †Ertangia
G. †Estoniops
G. †Garniella
G. †Gellensia
G. †Giandites
G. †Glezeria
Fm. †Glyptopleuridae Girty 1910
Superfm. †Glyptopleuroidea Girty 1910
G. †Gotula
G. †Gracquina
G. †Gramella
G. †Guberites
G. †Hatangeus
G. †Hebellum
G. †Hemsiella
G. †Hillmeria
G. †Histina
G. †Hithis
Fm. †Hollinidae Swartz 1936
Subor. †Hollinomorpha Henningsmoen 1965
G. †Huckea
G. †Ishmiella
G. †Javatius
G. †Katatona
Subor. †Kirkbyocopina Gründel 1969
G. †Kitabella
G. †Klonkina
G. †Kraftia
G. †Lapazites
G. †Latebina
G. †Lenatella
G. †Limatia
G. †Luciter
G. †Malnina
G. †Miraculum
G. †Moeckowia
G. †Murtiella
G. †Nicolina
G. †Nionella
G. †Nudista
G. †Obotrita
G. †Ockerella
G. †Oejlemyra
G. †Ojlemyra
G. †Panderia
G. †Parasleia
G. †Parphores
G. †Parvicyathus Kozur 1991
G. †Pentagona
G. †Polyzygia
G. †Porkornya
G. †Posnerina
Fm. †Punciidae Hornibrook 1949
G. †Quadritia
G. †Reginea
G. †Regubea
G. †Retinoda
G. †Ritatia
G. †Rivillina
G. †Sarvina
G. †Sarytumia
G. †Scaphina
G. †Scipionis
G. †Sekobolla
G. †Selon
G. †Serenida
G. †Severella
G. †Sichuania
G. †Siveteria
G. †Snaidar
G. †Spinella
G. †Strepula
G. †Sudon
G. †Susus
G. †Swantina
G. †Sylithis
G. †Tajurina
G. †Tegea
G. †Triassicindivisia Crasquin 2011
Superfm. †Tribolbinacea Sohn 1978
G. †Ullerella
G. †Undipila
G. †Uralina Schuchert and LeVene 1929
+
Invalid names: Uralia Licharew 1925 [replaced]
G. †Urdia
G. †Urftella
G. †Uscopria
G. †Wabiella
G. †Webbylla
G. †Wehrlina
G. †Welchella
G. †Wuxuania
G. †Zenkopsis
G. †Zigobolboides Unknown 1939
G. †Ziva
Invalid names: Beyrichiina Pokorný 1953 [empty], Eocytherella [nomen nudum]
Or. Platycopida Sars 1866
+
Subor. †Kloedenellocopina Scott 1961
Subor. Platycopina Sars 1866
Or. Podocopida Sars 1866
+
G. †Abursus
G. †Algerina
G. †Altha
G. †Ankumia
G. †Anxiania Xie 1989
G. †Aruduce
G. †Ascetoleberis Brouwers and Hazel 1978
G. †Aysegulina Özdikmen 2010
+
Invalid names: Limburgina [replaced]
Subor. Bairdiomorpha Kozur 1972
G. †Balowella
G. †Bosquetia
G. †Condomyra
G. †Coquimba
G. †Crenaleya
Subor. Cypridocopina Jones 1901
Superfm. Cytheracea Baird 1850
Superfm. †Cytherideoidea Leibau 2005
Subor. †Cytherocopina Gründel 1967
G. †Dahomeya
Subor. Darwinulocopina Sohn 1988
G. †Dentokrithe Khosla and Haskins 1980
G. †Diebelina
G. †Dumontina
G. †Egorovia
G. †Eripleura
G. †Euglyphella Warthin 1934
G. †Fabanella
G. †Garnuella
G. †Gramannella Lord 1972
G. †Hourqia Krömmelbein 1965
G. †Hyphasmaphora Van Pelt 1933
G. †Iatella
G. †Imhotepia
G. †Jefina
G. †Kaesleria
G. †Kefiella
G. †Keijella
G. †Lesleya
G. †Ligerina
G. †Lixouria
G. †Londinia
G. †Louza
G. Loxocorniculum Benson and Coleman 1963
G. †Memoria
Subor. †Metacopina Sylvester-Bradley 1961
G. †Moosina
G. †Murthya
G. †Namaia
G. †Nigeria Reyment 1963
G. †Nuguschia
G. †Octonaria Jones 1887
G. †Olbia
G. †Ordoniya
G. †Peloriops
G. Pistocythereis Gou 1983
G. †Plantella Zenkova 1977
Subor. Podocopina Sars 1866
G. †Prosumia
Fm. Psammocytheridae Klie 1938
G. Radimella Pokorny 1969
G. †Ranicella
G. †Raymoorea
G. †Rayneria
G. †Rishona
Fm. †Ropolonellidae Coryell and Malkin
G. †Rudderina Coryell and Malkin 1936
G. †Sarlatina
G. †Saumella
G. †Scaphium
G. †Schleesha
Subor. Sigilliocopina Martens 1992
G. †Sleia
G. †Spinomicrocheilinella Kozur 1985
G. †Stravia
G. †Sylthere
G. †Tegmenia
G. †Tianjinia
Superfm. †Trachyleberidoidea Liebau 2005
G. †Triadohealdia Kristan-Tollmann 1971
G. †Tricordis
G. †Verseya
G. †Wellandia
G. †Yiduella
G. †Zagorala
Invalid names: Bairdiocopina Grundel 1967 [empty], Healdiocopina Liebau 2005 [empty], Platycopina Sars 1866 [empty]
Superor. Podocopomorpha Sars 1865
+
Invalid names: Punciocopida Schallreuter 1968 [empty]
G. †Ponthocythere Dubowsky 1939
G. †Prasuchonella Molostovskaya 1980
G. Puriana Coryell and Fields 1953
+
Puriana carolinensis Hazel 1983
Puriana fissispinata Benson and Coleman 1963
Invalid names: Favella Coryell and Fields 1937 [synonym]
G. †Renicytherura Gruendel 1981
G. †Rockallia Whatley et al. 1978
G. †Septadella Smith and Stubblefield 1933
+
Septadella jackmanae Smith and Stubblefield 1933
G. †Sigillium
Fm. †Sigmoopsidae Henningsmoen 1953
+
G. †Disulcina Sarv 1959
G. †Ordovicia
G. †Suchonellina Spizharsky 1937
+
Suchonellina globosa Jones 1862
Suchonellina stricta Jones 1894
G. †Svealuta
G. †Tegaspis
G. †Tethysia Donze 1975
G. †Utsatia
G. †Vitella
Superfm. †Volganelloidea Mandelstam 1956
+
Fm. †Volganellidae Mandelstam 1956
+
G. †Unzhiella Mishina 1973
G. †Volganella Sharapova and Mandelstam 1956
G. †Yulinella
G. †Zerqacythere Basha 1980
Invalid names: Beichuania Xie 1989 [nomen nudum], Cuselina Ammon 1910 [nomen nudum], Darwinulacea Brady and Norman 1889 [empty], Golcondella [nomen dubium]
G. †Tokummia Aria and Caron 2017
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Tokummia katalepsis Aria and Caron 2017
Invalid names: Hymenocarididae Haeckel 1896 [empty]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Locomotion: actively mobilep
Created: 2004-02-29 09:38:49
Modified: 2004-02-29 11:38:49
Source: p = phylum
Reference: Kiessling 2004

Age range

Maximum range based only on fossils: base of the Ediacaran to the top of the Holocene or 635.00000 to 0.00000 Ma
Minimum age of oldest fossil (stem group age): 541.0 Ma

Collections (9857 total)

Oldest occurrences

Time interval Ma Country or state Original ID and collection number
Ediacaran635.0 - 541.0Mexico Platella sp. (10662)
Meishucunian530.7 - 521.0China (Shaanxi) Ostracoda indet. (6851)
Atdabanian521.0 - 516.0Australia (South Australia) Phasoia spicata (155233)
Atdabanian521.0 - 516.0China (Yunnan) Acanthomeridion sp. (86933) Acanthomeridion sp., Branchiocaris sp. (86930) Branchiocaris sp. (86929) Branchiocaris yunnanensis (86845 86846 86851 90138 90163 90164 90166 90494) Ercaicunia multinodosa (90137) Ercaicunia multinodosa, Branchiocaris yunnanensis (68083)
Nangaoian521.0 - 514.0China (Hubai) Branchiocaris sp. (219687)
Nangaoian521.0 - 514.0China (Yunnan) Branchiocaris yunnanensis (132327 132329 194140 194160 194161 194162 194163) Ercaicunia multinodosa, Branchiocaris yunnanensis (132330 194141 194143 194150 194153 194155)
Botomian516.0 - 512.9China (Yunnan) Branchiocaris sp. (90353)
Botomian - Lenian516.0 - 510.2Russian Federation (Transbaikalia) Ostracoda indet. (10007)
Botomian - Lenian516.0 - 510.2Russian Federation Duibianella sp. (10018)
Dyeran515.3 - 511.2USA (Pennsylvania) Hymenocaris dubia (226192) Hymenocaris sp. (192)
Dyeran515.3 - 511.2USA (California) Ostracoda indet. (219693)
Delamaran511.2 - 506.5Canada (British Columbia) Branchiocaris pretiosa (84412)
Delamaran511.2 - 506.5USA (Utah) Dioxycaris argenta, Branchiocaris pretiosa (77218)
Solvan - Menevian510.2 - 499.5Czech Republic Phyllocarida indet. (57206)
Middle Cambrian509.0 - 497.0Greenland Ostracoda indet. (10484 10485)
Middle Cambrian509.0 - 497.0Canada (Brithish Columbia) Branchiocaris sp. (188661 188662)
Middle Cambrian509.0 - 497.0USA (Utah) Branchiocaris pretiosa (80124 80128)
Middle Cambrian509.0 - 497.0Canada (British Columbia) Branchiocaris sp. (171308)
St Davids509.0 - 497.0Australia (Queensland) Ostracoda indet. (7900)
Templetonian508.0 - 504.5Australia (Queensland) Svealuta sp. A, Aristaluta sp. A, Flemingia duo (70046)