Phylum Coelenterata Leuckart, 1847 see Infrakingdom Coelenterata Leuckart, 1847
   Class Anthozoa Ehrenberg, 1831
     Subclass Zoantharia de Blainville, 1830
       Order Actiniaria - sea anemones
       Order Corallimorpharia
       Order †Heterocorallia Schindewolf, 1941
       Order †Hexanthiniaria
       Order †Kilbuchophyllida Scrutton & Clarkson, 1991
       Order †Rugosa Milne-Edwards & Haime, 1850
       Order Scleractinia Bourne, 1900
       Order †Tabulata (Milne-Edwards & Haime, 1850)
       Order Zoanthiniaria see Order Zoanthidea