[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Phylum Cnidaria Hatschek, 1888 - cnidarians
     Anthozoa Ehrenberg, 1831
       Hexacorallia Haeckel, 1866 - sea anemones and true corals see Subclass Zoantharia de Blainville, 1830
         Order Zoanthidea
           Family Parazoanthidae Delage & Hérouard, 1901
             1 Genus Gerardia Lacaze-Duthiers, 1864
             2 Genus Isozoanthus Carlgren in Chun, 1903
             3 Genus Parazoanthus Haddon & Shackleton, 1891