†Decaphyllum Frech 1885
Parent taxon: Anthozoa according to D. Hill 1981
Sister taxa: Actiniae, Actiniaria, Actinotheca, Antipatharia, Archaeotrypa, Bolboporites, Cambrophyllum, Cambrotrypa, Coelenteratella, Cothonion, Cysticyathus, Hexacorallia, Kitakamiphyllum, Lipopora, Numidiaphyllum, Octocorallia, Oekentorpia, Pennatulacea, Protoaulopora, Roselletona, Rugosa, Spongarium, Stolonifera, Strobilasma, Tabulata, Zoantharia
Subtaxa: none
Ecology: stationary intermediate-level epifaunal microcarnivore