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HOME --> CLASS MAMMALIA  --> ORDER RODENTIA  --> SUBORDER MYOMORPHA  --> SUPERFAMILY Muroidea  --> FAMILY Cricetidae  --> SUBFAMILY Arvicolinae  --> GENUS Dicrostonyx

SPECIES Dicrostonyx richardsoni

Author:Merriam, 1900.
Citation:Proc. Wash. Acad. Sci., 2: 26.
Common Name:Richardson’s Collared Lemming
Type Locality:Canada, Manitoba, Fort Churchill.
Distribution:W coast of Hudson Bay west to vicinity of Great Slave Lake, District of MacKenzie, Canada; extent of westward distribution unknown.
Status:IUCN – Lower Risk (lc).
Comments:Autosomal polymorphisms and distinctive sex chromosomes based on standard karyotypes reported by Van Wynsberghe and Engstrom (1992), who retained richardsoni as distinct from D. groenlandicus and postulated its differentiation in a SC periglacial refugium. Strong divergence of mitochrondrial DNA genotypes, based on restriction fragment analysis, indicates that the origination of D. richardsoni predated the Wisconsin glaciation (Engstrom et al., 1993).



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