Parent taxon: Echinodermata according to R. S. K. Barnes 1998
Sister taxa: Arkarua, Asterozoa, Blastoidea, Blastozoa, Camptostromoidea, Coronata, Ctenocystoidea, Ctenoimbricata, Cyclocystoidea, Cystoidea, Diploporita, Discoidea, Echinoconus, Echinozoa, Edrioasteroidea, Eleutherozoa, Graciacystis, Helicoplacoidea, Holothuroidea, Homoiostelea, Homostelea, Iheringiana, Macrocystellidae, Parablastoidea, Paracrinoidea, Pediculacaudinidae, Pelmatozoa, Peripneustes, Rhombifera, Scoteinocystis, Scutellidae, Scutellinidae, Semperitidae, Stylophora, Tubocaudinidae
Subtaxa: Abbreviatocrinites, Acariaeocrinus, Acrocrinidae, Articulata, Asperocrinidae, Balearocrinus, Becharocrinus, Bihaticrinus, Bourgueticrinida, Camerata, Cladida, Comatulida, Communicrinus, Coronocrinus, Craspedocrinus, Cyclocaudex, Cyclocrista, Cyclocyclicus, Cyclomischidae, Cycloscapus, Cyrtocrinida, Dazhucrinus, Dicirrocrinus, Diplobathrida, Disparida, Dolichocrinus, Dronovicrinus, Dulanocrinus, Dwortsowaecrinus, Echmatocrinida, Edriocrinus, Encrinida, Eucalyptocrinus, Exaesiodiscidae, Flexibilia, Flexicrinus, Floricyclidae, Floripila, Flucticharacidae, Flucticharax, Gemmacrinus, Glyphidocrinus, Helicocrinus, Hemistreptocrinus, Heterostelechus, Hybocrinida, Inadunata, Katarocrinus, Kojvicrinus, Kstutocrinidae, Lamprosterigma, Laubeocrinus, Leptocarphiidae, Lichenocrinus, Lotocrinus, Malovicrinus, Mastocrinus, Millericrinida, Mitrocrinus, Mooreanteris, Multifidocrinus, Nodolanx, Nonparactocrinus, Ordinacrinus, Pachyocrinus, Pandocrinus, Paractocrinus, Parorthocrinus, Passalocrinus, Pentacrinus, Pentagonocyclicus, Pentagonopterix, Pentaridica, Phillipsocrinus, Philocrinus, Pinegicrinus, Poteriocrinus, Preptopremnum, Qingyanocrinidae, Salairocrinidae, Salairocrinus, Schyschcatocrinidae, Solanocrinus, Spriocrinus, Stenocrinidae, Tantalocrinidae, Taranshicrinidae, Tatjanicrinus, Tetractocrinus, Tetractocrinus, Tetragonocyclicus, Tetralobocrinus, Tetramerocrinites, Thuringocrinus, Torrocrinus, Trochocrinites, Tytthocrinus, Uintacrinida, Webericrinus, Zeravschanocrinus
Ecology: stationary upper-level epifaunal suspension feeder