†order Heliolitida Frech 1897
Parent taxon: Anthozoa according to O. A. Dixon 1998
See also Gierlowski and Langenheim 1985 and Kiessling 2003
Sister taxa: Actiniae, Actinotheca, Cispusella, Cladoporium, Conularia kaibabensis, Cysticyathus, Decaphyllum, Hexacorallia, Ingordium, Kitakamiphyllum, Numidiaphyllum, Octocorallia, Oculina antiqua, Oekentorpia, Osculius, Paiutiida, Pyxidophyllum, Roselletona, Ruscum, Spongarium, Stolonifera, Strobilasma, Tablulaconida, Tabulata, Zoantharia
Subtaxa: Coccoseridicae Halysitina Heliolitina
Ecology: stationary intermediate-level epifaunal microcarnivore