Classification of Hostettler et al. 2017

G. †Plegiocidaris Pomel 1883
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†Plegiocidaris crucifera Agassiz 1840
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Invalid names: Cidaris cervicalis Agassiz 1840 [synonym]
Fm. †Rhabdocidaridae Lambert 1900
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G. †Rhabdocidaris Desor 1855
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†Rhabdocidaris copeoides Agassiz and Desor 1847
Fm. †Diplocidaridae Gregory 1900
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†Diplocidaris gigantea Agassiz 1840
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Invalid names: Cidaris cladifera Agassiz 1840 [synonym], Cidaris pustulifera Agassiz 1840 [synonym]
†Diplocidaris undulata Agassiz 1840
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Invalid names: Diplocidaris etalloni Desor 1869 [synonym]
Invalid names: Rolliericidaris Vadet 1991 [synonym]
Fm. Psychocidaridae Ikeda 1936
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†Merocidaris propinqua Muenster 1826
Fm. †Polycidaridae Vadet 1988
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G. †Nudicidaris Vadet 1988
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†Nudicidaris elegans Muenster 1829
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Invalid names: Cidaris mathei Desor and de Loriol 1868 [synonym]
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Invalid names: Cidaris aspera Agassiz 1840 [synonym]
†Paracidaris florigemma Phillips 1829