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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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