Full reference: J. E. Gray. 1840. A synopsis of the genera and species of the class Hypostoma Asterias (Linn.). Annals and Magazine of Natural History 6:275-290
Parent taxon: Asterozoa according to D. B. Blake 2013
See also Barnes 1998, Boczarowski 2001, Clark 1904, Clark and Twitchell 1915, Dean Shackleton 2005, Owen 1965, Schuchert 1915, Sepkoski 2002, Smith et al. 2025, Spencer and Wright 1966, Squires 1987 and von Zittel 1895
Sister taxa: Asteroidea, Catervaparmasteridae, Eopentaroida, Falloasteridae, Phragmactinidae, Somasteroidea, Stenuroidea, Auluroidea
Subtaxa: Ankhurida Ataxaster Calclyra Calclyridae Calyptactis Encrinasteridae Euzonosomatidae Hallasteridae Lumectaster Muldaster Myophiuridadup Nodolanx Oegophiurida Oegophiuridea Oegophiuroida Ophiaulaxoides Ophioma Ophiopetagno Ophiotrigonum Ophiurella Ophiuridea Phrynophiurida Stenasteridae Zygophiurae
Ecology: slow-moving low-level epifaunal detritivore-suspension feeder