living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Cnidaria Hatschek, 1888 - cnidarians
           Class Anthozoa Ehrenberg, 1831
             Subclass Zoantharia de Blainville, 1830
               Order Scleractinia Bourne, 1900
                 Suborder Caryophylliina Vaughan & Wells, 1943
                   Family Flabellidae Bourne, 1905
                     Genus Placotrochus Milne-Edwards & Haime, 1848