| ancient dna supports southern survival of richardson's collared lemming (dicrostonyx richardsoni) during the last glacial maximum. | collared lemmings (genus dicrostonyx) are circumpolar arctic arvicoline rodents associated with tundra. however, during the last glacial maximum (lgm), dicrostonyx lived along the southern ice margin of the laurentide ice sheet in communities comprising both temperate and boreal species. to better understand these communities and the fate of these southern individuals, we compare mitochondrial cytochrome b sequence data from three lgm-age dicrostonyx fossils from south of the laurentide ice shee ... | 2013 | 23495672 |