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 Dicrostonyx Gloger, 1841 - collared lemmings
1 Dicrostonyx exsul G.M. Allen, 1919 - St. Lawrence Island collared lemming
2 Dicrostonyx groenlandicus (Traill, 1823) - American arctic lemming
3 Dicrostonyx hudsonius (Pallas, 1778) - Labrador collared lemming
4 Dicrostonyx nelsoni Merriam, 1900 - Nelson's collared lemming
5 Dicrostonyx richardsoni Merriam, 1900 - Richardson's collared lemming
6 Dicrostonyx rubricatus (Richardson, 1889) - Bering collared lemming
7 Dicrostonyx stevensoni - Stevenson's collared lemming
see Dicrostonyx unalascensis Merriam, 1900
8 Dicrostonyx torquatus (Pallas, 1779) - Siberian arctic lemming
9 Dicrostonyx vinogradovi Ognev, 1948 - Wrangel lemming