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 Arctoidea Flower, 1869 see Infraorder Arctoidea Flower, 1869
                         Family Ursidae Batsch, 1788 - bears
                           1 Genus Ursus Linnaeus, 1758 - black, brown, polar, sun, and sloth bears
                           2 Genus Thalarcotos see Genus Thalarctos Gray, 1825
                           2 Genus Thalarctos Gray, 1825 - polar bear see Genus Ursus Linnaeus, 1758
                           3 Genus Selenarctos Heude, 1901 see Subgenus Euarctos (Gray, 1864)
                           4 Genus Helarctos Horsfield, 1825 - Malayan sun bear
                           5 Genus Melursus Meyer, 1793 - sloth bear
                           6 Genus Tremarctos Gervais, 1855 - spectacled bear