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 Microtinae see Subfamily Arvicolinae Gray, 1821
                           Tribe Lemmini Gray, 1825
                             Genus Lemmus Link, 1795 - true lemmings
                               Lemmus nigripes (True, 1894) - black-footed lemming see Lemmus sibiricus (Kerr, 1792)