Class Mammalia Linnaeus, 1758 - mammals
Order Rodentia Bowdich, 1821 - rodents
Suborder Sciurognathi (Tullberg, 1899)
see Suborder Sciuromorpha Brandt, 1855
Family Muridae Batsch, 1788 - rats, mice, hamsters, voles, lemmings, and gerbils
Subfamily Arvicolinae Gray, 1821 - voles
Genus Dicrostonyx Gloger, 1841 - collared lemmings
Dicrostonyx hudsonius (Pallas, 1778) - Labrador collared lemming