Mammal Species of the World
Click here for The American Society of Mammalogists species account
- Original description: Say, T., 1823. in Account of an expedition from Pittsburgh to the Rocky Mountains : performed in the years 1819 and 20, by order of the Hon. J.C. Calhoun, secy of war, under the command of Major Stephen H. Long : from the notes of Major Long, Mr. T. Say, and other gentlemen of the exploring party compiled by Edwin James, botanist and geologist for the expedition; in two vols., H.C. Carey and I. Lea, Philadelphia,1822-23. Vol 1, p 486.
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