Cidaroida
Order of sea urchins / From Wikipedia, the free encyclopedia
Cidaroida,[1] also known as pencil urchins,[2] is an order of primitive sea urchins, the only living order of the subclass Perischoechinoidea. All other orders of this subclass, which were even more primitive than the living forms, became extinct during the Mesozoic.
Quick Facts Scientific classification, Families ...
Cidaroida | |
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Cidaris cidaris | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Echinodermata |
Class: | Echinoidea |
Subclass: | Perischoechinoidea |
Order: | Cidaroida Claus, 1880 |
Families | |
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