Class [Mammalia] Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Family Muridae Batsch, 1788 - rats, mice, hamsters, voles, lemmings, and gerbils
       Subfamily Arvicolinae Gray, 1821 - voles
         Genus Pitymys McMurtrie, 1831 - pine voles see Genus Microtus Schrank, 1798
           Pitymys pinetorum (Le Conte, 1830) - American pine vole see Microtus pinetorum (Le Conte, 1830)