Pseudodiadematidae are members of the phylum Echinodermata. Their fossil remains date to the Cretaceous period (144 - 66.4 MYA). Its child geniuses are Acanthechinopsis, Acrocidaris, Acrotiaris and Aplodiadema.[citation needed]
Pseudodiadematidae | |
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Acrocidaris nobilis | |
Scientific classification ![]() | |
Kingdom: | Animalia |
Phylum: | Echinodermata |
Class: | Echinoidea |
Order: | †Hemicidaroida |
Family: | †Pseudodiadematidae |