Alternative spelling: Cladoidea
Parent taxon: Inadunata according to G. D. Webster et al. 2025
See also Ausich 1998, Ausich et al. 1998, Ausich and Copper 2010, Ausich and Cournoyer 2019, Ausich et al. 2007, Ausich et al. 2019, Ausich et al. 2018, Brower et al. 2024, Burke 1977, Ciampaglio et al. 2007, Frest and Strimple 1982, Haugh 1979, Kammer and Roeser 2012, Mao et al. 2018, Moore and Jeffords 1968, Moore and Laudon 1943, Ramsbottom 1958, Sepkoski 2002, Webster et al. 1999, Webster and Lane 1987, Webster and Lane 2007, Webster et al. 2009, Webster and Webster 2012, Wright et al. 2017 and Wright et al. 2019
Sister taxa: Dicirrocrinus, Disparata, Disparida, Fistulata, Larviformia, Merocrinidae, Metabolocrinidae, Paractocrinidae, Passalocrinus, Pentamerocrinidae, Poteriocrinidae, Thuringocrinus
Subtaxa: 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