Echinocystitoida

Echinocystitoida were an order of extinct sea urchin in the subclass Perischoechinoidea.

Echinocystitoida
Scientific classification
Kingdom: Animalia
Phylum: Echinodermata
Class: Echinoidea
Subclass: Perischoechinoidea
Order: Echinocystitoida

References


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