Subphylum Eleutherozoa Bell 1891
Full reference: F. J. Bell. 1891. On the arrangment and inter-relations of the classes of the Echinodermata. The annals and Magazine of Natural History 8:206-215
Parent taxon: Echinodermata according to F. J. Bell 1891
Sister taxa: Asterozoa, Blastozoa, Camptostromoidea, Cincta, Crinoidea, Ctenocystoidea, Ctenoimbricata, Cyclocystoidea, Discoidea, Echinoconus, Echinozoa, Edrioasteroidea, Helicocystitidae, Helicoplacoidea, Holothuroidea, Homoiostelea, Homostelea, Iheringiana, Mesocrinus, Paracrinozoa, Pediculacaudinidae, Pelmatozoa, Peripneustes, Scoteinocystis, Scutellidae, Scutellinidae, Semperitidae, Stylophora, Tubocaudinidae
Subtaxa: Ophiocistioidea