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 Simonkovicrinus Trachelocrinida Ubaghsicystis
Ecology: stationary epifaunal suspension feeder