Alternative spelling: Protocrinoida
Full reference: T. E. Guensburg and J. Sprinkle. 2003. The oldest known crinoids (Early Ordovician, Utah) and a new crinoid plate homology system. Bulletins of American Paleontology 364:1-43
Parent taxon: Crinoidea according to D. F. Wright et al. 2017
See also Guensburg and Sprinkle 2003
Sister taxa: Acariaeocrinus, Aethocrinea, Angulata, Asperocrinidae, Aspidocrinus, Balearocrinus, Baryschyr, Bystrowicrinus, Camerata, Carpenterocrinus, Communicrinus, Conspectocrinus, Cyclocaudex, Cyclocharacidae, Cyclocrista, Cyclocyclicus, Cyclomischidae, Cycloscapus, Dazhucrinus, Dentiferocrinidae, Dentiferocrinus, Dicyclica, Dronovicrinus, Dulanocrinus, Dwortsowaecrinus, Echmatocrinida, Ellipsoellipticus, Entrochus, Entrochus rotiformis, Exaesiodiscidae, Flexicrinus, Floricrinus, Floricyclidae, Floripila, Flucticharacidae, Flucticharax, Forbesiocrinus siculus, 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, Salairocrinidae, Salairocrinus, Schyschcatocrinidae, Stenocrinidae, Stukaliniidae, Tantalocrinidae, Taranshicrinidae, Tatjanicrinus, Tetragonocyclicus, Tetralobocrinus, Torrocrinus, Waikaripites, Webericrinus, Zeravschanocrinus
Subtaxa: none
Ecology: stationary upper-level epifaunal suspension feeder
Distribution: there are no occurrences of Protocrinoidea in the database