Subclass Euasteroidea Sladen 1889 (sea star)
Full reference: W. P. Sladen. 1889. The Asteroidea. Report of the Scientific Results of the Voyage of the H.M.S. Challenger 1873-1876, Zoology 30:1-935
Parent taxon: Asteroidea according to W. P. Sladen 1889
Sister taxa: Ambuloasteroidea, Arthrasteridae, Cryptozonia, Embolasteridae, Eriaster, Fandasteridae, Hemizonida, Hudsonasteridae, Lepidasteridae, Monasteridae, Neoasteroidea, Neopalaeasteridae, Palasterinidae, Petraster, Phanerozonida, Platyasterida, Pleiadeaster, Pleuraster, Promopalaeaster, Promopalaeasteridae, Protasteracanthion, Pustulosida, Spinulosacea, Trichotaster, Uranasteridae, Zorocallida
Subtaxa: none
Ecology: slow-moving low-level epifaunal carnivore