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, Cambrotrypa, Conularia kaibabensis, Cysticyathus, Decaphyllum, Hexacorallia, Kitakamiphyllum, Numidiaphyllum, Octocorallia, Oekentorpia, Paiutiida, Pyxidophyllum, Roselletona, Spongarium, Stolonifera, Strobilasma, Tablulaconida, Tabulata
Subtaxa: Cyclabacia Drosdovia Kilbuchophyllida Pentasmiliida Tabulaconida
Ecology: stationary intermediate-level epifaunal microcarnivore