Echinoidea

Parent taxon: Echinoidea according to J.O. Chiesa et al. 1995

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

Subtaxa: Allocentrotus, Echinostrephus, Ellipsechinus, Heliocidaris, Spaniocyphus, Trochoechinus, Zenocentrotus

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Ecology: slow-moving low-level epifaunal grazer