Order Actiniaria (sea anemone)
Alternative spelling: Actinaria
Parent taxon: Anthozoa according to R. K. Bambach et al. 2007
Sister taxa: Actiniae, 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
Subtaxa: Beltanelliformis, Mackenzia
Ecology: stationary low-level epifaunal suspension feeder