Parent taxon: Cladida according to W. I. Ausich 1998
See also Arendt 1981, Burke 1977, Ubaghs et al. 1978, Villanueva-Olea and Sour-Tovar 2015, Webster et al. 1999, Webster and Lane 1987, Webster and Webster 2012 and Wright et al. 2017
Sister taxa: Aaglacrinus, Aethocrinidae, Aithriocrinus, Ampelocrinida, Apektocrinidae, Bicidiocrinus, Briseocrinus, Cathetocrinus, Cromyocrinacea, Cyathocrinacea, Dendrocrinina, Dimerocrinites anticostiensis, Eucladida, Flexibilia, Harmostocrinus, Idaeumocrinus, Kanabinocrinus, Kansacrinus, Kooptoonocrinus, Lanecrinus, Lekocrinus, Mathericrinus, Menniscocrinus, Nacocrinus, Nuxocrinus, Parascytalocrinus, Perittocrinus, Porocrinoidea, Poteriocrinitina, Pskovicrinus, Pulaskicrinus, Pyrenocrinus, Rimosidocrinus, Saccosompsis, Sardinocrinus, Scammatocrinus, Treocrinus, Wetherbyocrinus, Worthenocrinus
Subtaxa: Apographiocrinacea Aulodesocrinus Calceolispongiacea Calceolispongioidea Carlopsocrinus Cupressocrinitacea Hydreionocrinacea Poteriocrinitacea Rhenocrinacea Tarassocrinus Texacrinacea
Ecology: stationary intermediate-level epifaunal suspension feeder