Lemmus trimucronatus (Richardson, 1825)  

Family: Cricetidae

Nearctic Brown Lemming

[Arvicola helvolus Richardson, 1828, moreArvicola trimucronatus Richardson, 1825, Lemmus alascensis Merriam, 1900, Lemmus harroldi Swarth, 1931, Lemmus minusculus Osgood, 1904, Lemmus nigripes (True, 1894), Lemmus trimucronatus phaiocephalus Manning and Macpherson, 1958, Lemmus trimucronatus subarticus Bee and Hall, 1956, Lemmus yukonensis Merriam, 1900, Myodes nigripes True, 1894]