Parent taxon: Cnidaria according to E. Kayal et al. 2013
See also Edwards 1988 and Sepkoski 2002
Sister taxa: Aspidella, Ausia, Cloudinidae, Conulata, Cordilites, Crassitubus, Cyclozoa, Erniettamorpha, Escumasia, Haootia, Hiemalora, Hydroconozoa, Medusae, Medusozoa, Melanofurcata, Melanosteus, Melanostylus, Myxozoa, Namacalathus, Olivooidae, Priscapennamarina, Quadratitubus, Ramellina, Ramitubus, Sinocyclocyclicus, Spatangopsis, Syringophyllum, Vauzutsubua, Xianguangia, Zolotytsia
Subtaxa: Actiniae Actiniaria Actinotheca Antipatharia Archaeotrypa Bolboporites Cambrophyllum Cambrotrypa Coelenteratella Cothonion Cysticyathus Decaphyllum Hexacorallia Kitakamiphyllum Lipopora Numidiaphyllum Octocorallia Oekentorpia Pennatulacea Protoaulopora Roselletona Rugosa Spongarium Stolonifera Strobilasma Tabulata Zoantharia
Ecology: stationary intermediate-level epifaunal microcarnivore