Order Rodentia (Part 4) Author James H. Honacki Author Kenneth E. Kinman Author James W. Koeppl text 1982 Alien Press, Inc. & The Association of Systematics Collections Lawrence, Kansas, USA Editor James H. Honacki Editor Kenneth E. Kinman Editor James W. Koeppl Mammal Species of the World (1 st Edition) 477 504 book chapter http://doi.org/10.5281/zenodo.7353034 4170533d-8435-4cb4-93df-e7f9489eb798 0-89327-235-3 7353034 Clethrionomys gapperi (Vigors, 1830) . Zool. J., 5:204 . TYPE LOCALITY: Canada , Ontario , between York (=Toronto) and Lake Simcoe . DISTRIBUTION: From Labrador to N. British Columbia ( Canada ), south in the Appalachians to N. Georgia ; Great Lakes, Northern Plains, and Rocky Mtns. ( New Mexico and Arizona ) to Columbia River in Washington ( U.S.A. ). COMMENT: Includes occidentalis and caurinus; see Johnson and Ostenson, 1959 , J. Mammal., 40:571-577, Cowan and Guiguet, 1965 , The Mammals of British Columbia , Br. Columbia Prov. Mus . Handbook, 11: 1-413, and Hall, 1981:780 , 782-783. Closely related to Eurasian glareolus ; captive mating produces fertile hybrids, but of reduced fertility; see Grant, 1974 , J. Zool. Lond., 174:245-254. Youngman, 1975 , Mammals of the Yukon Terr., Nat. Mus . Can. Publ. Zool., 10:85, considered gapperi and rutilus conspecific; but see Nadler et al., 1978 , Can. J. Zool., 56(7): 1564-1575, and Hall, 1981:778-784 ; also see comment under rutilus . Reviewed by Merritt, 1981 , Mamm. Species, 146:1-9. ISIS NUMBER: 5301410008072001001 as C. gapperi . ISIS NUMBER: 5301410008072003001 as C. occidentalis.