Parent taxon: Echinodermata according to M. A. Zuykov et al. 2008
See also Bockelie 1984, Lefebvre and Lerosey-Aubril 2017, Parsley and Zhao 2006 and Zhao et al. 2008
Sister taxa: Asterozoa, Camptostromoidea, Cincta, Crinoidea, Ctenocystoidea, Ctenoimbricata, Cyclocystoidea, Discoidea, Echinoconus, Echinozoa, Edrioasteroidea, Eleutherozoa, Helicocystitidae, Helicoplacoidea, Holothuroidea, Homoiostelea, Homostelea, Iheringiana, Mesocrinus, Paracrinozoa, Pediculacaudinidae, Pelmatozoa, Peripneustes, Scoteinocystis, Scutellidae, Scutellinidae, Semperitidae, Stylophora, Tubocaudinidae
Subtaxa: Blastoidea Coronoidea Diploporita Eocrinoidea Felbabkacystidae Lepidocystidae Parablastoidea Rhombifera Rhombifera
Ecology: stationary epifaunal suspension feeder