Parent taxon: Blastozoa according to R. L. Parsley and Y.-L. Zhao 2006
See also Beaver et al. 1967, Nohejlová 2017, Regnéll 1945, Sepkoski 2002, Sprinkle 1973, Sprinkle and Collins 2006 and Zhao et al. 2008
Sister taxa: Asteroblastida, Blastoidea, Crinoidea, Diploporita, Glyptosphaeritida, Lepidocystoidea, Parablastoidea, Paracrinoidea, Rhombifera, Rhombifera, Soluta, Sphaeronitida
Subtaxa: Acanthocystites Ascocystitida Ascocystitidae Balangicystis Balantiocystis Bolboporites Cardiocystites Cigara Cryptocrinitidae Cymbionites Gogiida Haimacystis Hexedriocystis Imbricata Lapillocystites Lichenoididae Lingulocystidae Llanocystis Luhocrinus Marjumicystis Palaeocystitidae Paracryptocrinites Peridionites Pilocystites Polyptychella Rhipidocystidae Ridersiidae Trachelocrinida Ubaghsicystis
Ecology: stationary epifaunal suspension feeder