Echinoidea

Parent taxon: Echinoidea according to J. J. Sepkoski 2002

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

Subtaxa: Tetraramania

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Ecology: slow-moving shallow infaunal deposit feeder