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 Carnivora Bowdich, 1821 - carnivores
                     Suborder Caniformia Kretzoi, 1943
                       Superfamily Musteloidea Batsch, 1788 see Parvorder Musteloidea Kretzoi, 1929
                         Family Phocidae Gray, 1821 - true seals
                           Genus Phoca Linnaeus, 1758 - harbor, ringed, harp, and ribbon seals
                             1 Phoca caspica Gmelin, in Linnaeus, 1788 - Caspian seal see Pusa caspica (Gmelin, 1788)
                             2 Phoca sibirica Gmelin, in Linnaeus, 1788 - Baikal seal see Pusa sibirica (Gmelin, 1788)
                             3 Phoca hispida Schreber, 1775 - ringed seal see Pusa hispida (Schreber, 1775)