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 Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates
             Class Chondrichthyes Huxley, 1880 - cartilaginous fishes
               Subclass Holocephalii see Superorder Holocephali Bonaparte, 1831
                 Order Chimaeriformes Obruchev, 1953 - chimaeras
                   1 Family Rhinochimaeridae Garman, 1901 - longnose chimaeras
                   2 Family Callorhinchidae Garman, 1901 - plownose chimaeras
                   3 Family Chimaeridae Rafinesque, 1815 - shortnose chimaeras