Parent taxon: Cnidaria according to J. J. Sepkoski 2002

Sister taxa: Anthozoa, Aspidella, Ausia, Cloudinidae, Conulata, Crassitubus, Cubozoa, Cyclozoa, Erniettamorpha, Escumasia, Hiemalora, Hydroconozoa, Hydrozoa, Medusae, Melanosteus, Melanostylus, Myxozoa, Namacalathus, Priscapennamarina, Quadratitubus, Ramellina, Ramitubus, Scyphozoa, Sinocyclocyclicus, Spatangopsis, Vauzutsubua, Xianguangia, Zolotytsia

Subtaxa: none