Echinoidea - Perischoechinoidea

Alternative spelling: Perischoechinida

Full reference: F. M'Coy. 1849. On some new Paleozoic Echinodermata. Annals and Magazine of Natural History, ser. 2 3:244-254

Parent taxon: Echinoidea according to C. L. Schneider et al. 2005

Sister taxa: Acrosalenioida, Archaeocidaridae, Bromidechinus, Cassiduloidea, Cidarites, Cidaroidea, Diplocidaroida, Disasteroida, Dysaster, Echinocrinus, Echinoida, Euechinoidea, Gnathostomata, Hemicidaroidea, Oligopygoida, Parechinus, Radiolus, Regularia, Temnopleuroida

Subtaxa: Bothriocidaroida, Echinocystitoida, Lanternarius, Lepidocentridae, Palaechinoidea

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Ecology: slow-moving low-level epifaunal grazer