Parent taxon: Blastozoa according to S. L. Sheffield and C. D. Sumrall 2018
See also Barnes 1998, Guensburg and Sprinkle 2003 and Sepkoski 2002
Sister taxa: Asteroblastida, Blastoidea, Diploporita, Eocrinoidea, Glyptosphaeritida, Lepidocystoidea, Parablastoidea, Paracrinoidea, Rhombifera, Rhombifera, Soluta, Sphaeronitida
Subtaxa: Acariaeocrinus Aethocrinea Angulata Asperocrinidae Aspidocrinus Balearocrinus Baryschyr Bornium Camerata Carpenterocrinus Communicrinus Conspectocrinus Crisantum Cyclocaudex Cyclocharacidae Cyclocrista Cyclocyclicus Cyclomischidae Cycloscapus Dazhucrinus Dentiferocrinidae Dentiferocrinus Dicyclica Dronovicrinus Dulanocrinus Dwortsowaecrinus Echmatocrinida Entrochus Entrochus rotiformis Exaesiodiscidae Flexicrinus Floricyclidae Floripila Flucticharacidae Flucticharax Gasterometra Gemmacrinus Glyphidocrinus Hemistreptocrinoidea Heterostelechus Kojvicrinus Kstutocrinidae Lamprosterigma Leptocarphiidae Lichenocrinus Malovicrinus Mastocrinus Mooreanteris Moscovicrinus Multifidocrinus Nollenbachblastus Ordinacrinus Pandocrinus Pentacrinoidea Pentagonocyclicus Pentagonopterix Pentaridica Phialocrinus Picteticrinus Pinegicrinus Preptopremnum Protocrinoida Protocrinoidea Salairocrinidae Salairocrinus Schyschcatocrinidae Stenocrinidae Stukaliniidae Tantalocrinidae Taranshicrinidae Tatjanicrinus Tetragonocyclicus Tetralobocrinus Torrocrinus Waikaripites Webericrinus Zeravschanocrinus
Ecology: stationary upper-level epifaunal suspension feeder