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
See also Blake 1989, Blake 1994, Blake 2018, Blake and Rozhnov 2007, Lehmann 1957, Owen 1965, Sepkoski 2002, Spencer 1951 and Spencer and Wright 1966
Sister taxa: Ambuloasteroidea, Arthrasteridae, Cryptozonia, Euasteroidea, Euaxosida, Hadrosida, Hemizonida, Hunsrueckaster, Kermasida, Lepidasterella, Neopalaeasteridae, Petrasteridae, Phanerozoma, Phanerozonida, Pleuraster, Proactis, Protarthraster, Pustulosida, Schuchertiidae, Silicaster, Spinulosacea, Trichotaster, Yarravaster
Subtaxa: Eukrinasteridae Uractinina
Ecology: slow-moving low-level epifaunal carnivore
Distribution: there are no occurrences of Platyasterida in the database