Subclass Zoantharia de Blainville 1830
Parent taxon: Anthozoa according to Y. Ezaki 2000
See also Squires 1984, Squires 1987 and Squires 1999
Sister taxa: Actiniae, Actinotheca, Cispusella, Cladoporium, Conularia kaibabensis, Cysticyathus, Decaphyllum, Heliolitida, Hexacorallia, Ingordium, Kitakamiphyllum, Numidiaphyllum, Octocorallia, Oculina antiqua, Oekentorpia, Osculius, Paiutiida, Pyxidophyllum, Roselletona, Ruscum, Spongarium, Stolonifera, Strobilasma, Tablulaconida, Tabulata
Subtaxa: Cyclabacia Drosdovia Kilbuchophyllida Pentasmiliida Tabulaconida
Ecology: stationary intermediate-level epifaunal microcarnivore