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 Microtini (Miller, 1896) Simpson, 1945 see Tribe Arvicolini Gray, 1821
                             Genus Pitymys McMurtrie, 1831 - pine voles see Genus Microtus Schrank, 1798
                               Pitymys duodecimcostatus (de Selys-Longchamps, 1839) - Mediterranean pine vole see Microtus duodecimcostatus de Selys-Longchamps, 1839
                               Pitymys multiplex (Fatio, 1905) - Alpine pine vole see Microtus multiplex (Fatio, 1905)
                               Pitymys pinetorum (Le Conte, 1830) - American pine vole see Microtus pinetorum (Le Conte, 1830)
                               Pitymys savii (de Selys-Longchamps, 1838) - Savi's pine vole see Microtus savii (de Selys-Longchamps, 1838)
                               Pitymys subterraneus (de Selys-Longchamps, 1836) - European pine vole see Microtus subterraneus (de Selys-Longchamps, 1836)