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 Mustelidae Batsch, 1788 - weasels, badgers, skunks, and otters
                           Subfamily Lutrinae Bonaparte, 1838 - otters
                             1 Genus Lutra Brisson, 1762 - river otters
                             2 Genus Aonyx Lesson, 1827 - clawless otters
                             3 Genus Lutrogale Gray, 1865
                             4 Genus Amblonyx Rafinesque, 1832 see Genus Aonyx Lesson, 1827
                             5 Genus Pteronura Gray, 1837 - giant otter
                             6 Genus Enhydra Fleming, 1822 - sea otter