Classification of the order Echinocystitoida
Or. †Echinocystitoida Jackson 1912
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G. †Aptilechinus
G. †Cavanechinus
G. †Devonocidaris
Fm. †Echinocystitidae Gregory 1897
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G. †Echinocystites
G. †Praepholidocidaris Frest and Strimple 1977
G. †Rhenechinus
G. †Ledidocidaris
Fm. †Lepidesthidae Jackson 1896
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G. †Tornquistellus
Invalid names: Echinocyctitidae Gregory 1897 [empty]