Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates
             Class Mammalia Linnaeus, 1758 - mammals
               Subclass Eutheria Gill, 1872 see 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 Cricetinae Fischer de Waldheim, 1817 - hamsters
                           Tribe Hesperomyini see Subfamily Sigmodontinae Wagner, 1843
                             Genus Sigmodon Say & Ord, 1825 - cotton rats
                               Sigmodon ochrognathus V. Bailey, 1902 - yellow-nosed cotton rat