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 Muridae Batsch, 1788 - rats, mice, hamsters, voles, lemmings, and gerbils
                         Subfamily Hydromyinae Alston, 1876 see Subfamily Murinae Batsch, 1788
                           Genus Hydromys Geoffroy Saint-Hilaire, 1804 - beaver-rats
                             Hydromys chrysogaster E. Geoffroy, 1804 - beaver-rat