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 Mammalia Linnaeus, 1758 - mammals
               Subclass Theria Parker & Haswell, 1897
                 Infraclass Eutheria Gill, 1872
                   Order Odontoceta Ameghino, 1889 see Parvorder Odontoceti Flower, 1867
                     Family Physeteridae Gray, 1821 - sperm whales
                       Genus Kogia Gray, 1846 - pygmy and dwarf sperm whales
                         1 Kogia breviceps (Blainville, 1838) - pygmy sperm whale
                         2 Kogia simus (Owen, 1866) - dwarf sperm whale