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 Alcyonaria
               Order Pennatulacea - sea pens and sea pansies
                 Suborder Sessiliflorae
                   Family Protoptilidae
                     1 Genus Distichoptilum Verrill, 1882
                     2 Genus Helicoptilum Nutting, 1912
                     3 Genus Protoptilum Kölliker, 1872