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 Rodentia Bowdich, 1821 - rodents
                     Suborder Myomorpha Brandt, 1855 see Infraorder Myomorphi
                       Superfamily Muroidea Batsch, 1788
                         Family Cricetidae Fischer, 1817
                           Subfamily Microtinae see Subfamily Arvicolinae Gray, 1821
                             Tribe Microtini (Miller, 1896) Simpson, 1945 see Tribe Arvicolini Gray, 1821
                               Genus Ondotra see Genus Ondatra Link, 1795, nom. nud.