†subphylum Homalozoa Whitehouse 1941
Parent taxon: Echinodermata according to H. H. Beaver et al. 1967
Sister taxa: Argonevis, Aspidocrinites, Blastozoa, Camptostromoidea, Carpoidea, Cincta, Corneotuba, Cornuvacites, Crinozoa, Ctenocystoidea, Ctenoimbricata, Cyclocystoidea, Echinosphaera, Edrioasteroidea, Eleutherozoa, Erinea, Fanerocoelia, Helicocystitidae, Helicoplacoidea, Iheringiana, Limolepis, Nemotapis, Paracrinozoa, Pediculacaudinidae, Pelmatozoa, Radimonis, Scoteinocystis, Scutellidae, Scutellinidae, Stylophora, Tubocaudinidae, Venerella
Subtaxa: Homoiostelea Homostelea