†family Rhizangiidae d'Orbigny 1851 (stony coral)
Parent taxon: Faviicae according to J. W. Wells 1956
Sister taxa: Anthemiphylliidae, Faviidae, Meandrinidae, Merulinidae, Montlivaltiidae, Pectiniidae, Tropiphyllidae
Subtaxa: Arctangia, Astrangia, Bathangia, Cladangia, Cryptangia, Culicia, Oulangia, Phyllangia, Platyhelia, Reussangia, Rhizangia, Septastrea, Symbiangia
Ecology: stationary intermediate-level epifaunal suspension feeder