Order Rodentia - Family Muridae Author Guy G. Musser Author Michael D. Carleton text 1993 Smithsonian Institution Press Washington and London Editor Don E. Wilson Editor DeeAnn M. Reeder Mammal Species of the World (2 nd Edition) 501 755 book chapter http://doi.org/10.5281/zenodo.7353098 1-56098-217-9 7353098 Synaptomys borealis (Richardson, 1828) . Zool. J., 3:517 . TYPE LOCALITY: Canada , District of Mackenzie, Great Bear Lake, Fort Franklin . DISTRIBUTION: Alaska to N Washington , USA , eastwards across much of interior Canada to Labrador; disjunct range segment from Gaspe Peninsula, Quebec , to C New Hampshire , USA . SYNONYMS: andersoni , artemisiae, bullatus , chapmani , dalli , innuitus , medioximus, smithi , sphagnicola , truei , wrangeli . COMMENTS: Subgenus Mictomys . Pleistocene records establish the species in the Great Basin, far to the south of its current range (see Mead et al., 1992 ).