Asteroidea

Full reference: W. K. Spencer. 1951. Early Palaeozoic starfish. Philosophical Transactions of the Royal Society of London, series B 235(B623):87-129

Parent taxon: Asteroidea according to D. B. Blake 2007

Sister taxa: Ambuloasteroidea, Arthrasteridae, Cryptozonia, Embolasteridae, Eriaster, Euasteroidea, Fandasteridae, Hemizonida, Hudsonasteridae, Lepidasteridae, Monasteridae, Neoasteroidea, Neopalaeasteridae, Palasterinidae, Petraster, Phanerozonida, Pleiadeaster, Pleuraster, Promopalaeaster, Promopalaeasteridae, Protasteracanthion, Pustulosida, Spinulosacea, Trichotaster, Uranasteridae, Zorocallida

Subtaxa: Eukrinasteridae, Palasteriscidae, Uractinina

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Ecology: slow-moving low-level epifaunal carnivore