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 Clethrionomys Tilesius, 1850 - red-backed mice
           1 Clethrionomys andersoni - Japanese red-backed vole see Phaulomys andersoni (Thomas, 1905)
           2 Clethrionomys californicus (Merriam, 1890) - western red-backed vole
           3 Clethrionomys centralis Miller, 1906
           4 Clethrionomys gapperi (Vigors, 1830) - Gapper's red-backed vole
           5 Clethrionomys glareolus (Schreber, 1780) - bank vole
           6 Clethrionomys rufocanus (Sundevall, 1846) - grey red-backed vole
           7 Clethrionomys rutilus (Pallas, 1779) - northern red-backed vole