Classification of Kier 1962
Or. Cassiduloida Agassiz and Desor 1847
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Fm. †Archiacidae Cotteau and Triger 1869
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Fm. †Faujasidae Lambert 1905
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G. †Petalobrissus Lambert 1916
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†Petalobrissus ammonis Fourtau 1914
†Petalobrissus lefebvrei Fourtau 1914
†Petalobrissus setifensis Coquand 1866
Fm. †Faujasiidae Lambert 1905
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G. †Hardouinia d'Archiac and Haime 1853
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†Hardouinia hemispherica Slocum 1909
†Hardouinia mortonis Michelin 1850
Invalid names: Gonioclypeus Emmons 1858 [synonym]
Fm. †Archiaciidae Cotteau and Triger 1869
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Or. †Cassiduloidea
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G. †Astropygaulus Checchia-Rispoli 1945
Fm. Cassidulidae Agassiz and Desor 1847
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G. †Hypsopygaster
G. †Nucleopygus Agassiz 1840
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†Nucleopygus angustatus Clark and Twitchell 1915
†Nucleopygus minor Desor 1842
†Nucleopygus scrobiculatus Goldufss 1826
G. Rhyncholampas Agassiz 1869
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†Rhyncholampas ellipticus Arnold and Clark 1927
†Rhyncholampas grignonensis DeFrance 1825
†Rhyncholampas pacificus Agassiz 1869
G. Rhynchopygus d'Orbigny 1856
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†Rhynchopygus lapiscancri Leske 1778
Rhynchopygus marmini Agassiz 1847
G. †Centropygus
G. †Claviaster
G. †Clypeanthus
Fm. †Clypeidae Lambert 1898
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G. †Bothryopneustes Fourtau 1924
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†Bothryopneustes lamberti Forteau 1924
Invalid names: Clypeobrissus Currie 1925 [synonym]
G. †Clypeus Leske 1778
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†Clypeus agassizi Wright 1851
†Clypeus plotii Leske 1778
†Clypeus wylliei Currie 1925
Invalid names: Auloclypeus Pomel 1883 [synonym], Dactyloclypeus Maccagno 1947 [synonym], Echinoclypeus De Blainville 1830 [synonym]
G. †Pygurus Agassiz 1839
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Subg. †Pygurus (Pygurus) Agassiz 1839
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†Pygurus (Pygurus) lampas de la Beche 1833
†Pygurus (Pygurus) montmollini Agassiz 1836
Invalid names: Echinopygus d'Orbigny 1856 [synonym]
Fm. †Clypeolampadidae Kier 1962
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G. †Echinanthus Leske 1778
Fm. Echinolampadidae Gray 1851
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G. †Arnaudaster
G. Echinolampas Gray 1825
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†Echinolampas lechoni Cotteau 1880
†Echinolampas lucae Desor 1847
†Echinolampas oviformis Gmelin 1789
†Echinolampas posterocrassus Gregory 1890
†Echinolampas raulini Cotteau 1863
G. †Parapygus
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†Parapygus cotteauanus d'Orbigny 1856
†Parapygus longior Cotteau and Gauthier 1895
Invalid names: Pseudocatopygus Cotteau and Gauthier 1895 [synonym], Rostropygus Szörényi 1955 [synonym]
Fm. †Galeropygidae Lambert 1911
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G. †Galeropygus
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†Galeropygus agariciformis Wright 1851
Invalid names: Ressopygus Pomel 1883 [synonym]
G. †Hyboclypus Agassiz 1839
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†Hyboclypus caudatus Wright 1852
†Hyboclypus gibberulus Agassiz 1839
Invalid names: Aulacopygus Pomel 1883 [synonym]
G. †Jolyclypus Lambert 1918
Fm. †Nucleolitidae Agassiz and Desor 1847
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G. †Catopygus
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†Catopygus bargesii d'Orbigny 1856
†Catopygus carinatus Goldfuss 1826
Invalid names: Penesticta Pomel 1883 [synonym]
G. †Nucleolites Lamarck 1801
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†Nucleolites scutatus Lamarck 1816
Invalid names: Echinobrissus Gray 1825 [synonym]
G. †Phyllobrissus Cotteau 1859
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†Phyllobrissus gresslyi Agassiz 1839
Invalid names: Anthobrissus Pomel 1883 [synonym], Asterobrissus de Loriol 1888 [synonym]
G. †Plagiochasma
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†Plagiochasma olfersii Agassiz 1836
Invalid names: Dochmostoma Duncan 1891 [synonym]
G. †Pseudosorella
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†Pseudosorella orbignyana Cotteau 1855
†Pseudosorella syriacus de Loriol 1901
Invalid names: Neoclypeus de Loriol [synonym]
G. †Pygorhynchus
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†Pygorhynchus obovatus Agassiz 1836
Invalid names: Botriopygus d'Orbigny 1855 [objective synonym]
G. †Ovulechinus
G. †Platipygus de Loriol 1902