The long-tailed vole (Microtus longicaudus) exhibits karyotypic variation in western North America. In the American Southwest, the species has a disjunct, relict distribution. However, karyotypes obtained from 20 specimens in 5 isolated mountain ranges (White Mountains, Arizona; Mount Taylor and the Sangre de Cristo, Jemez, and Mogollon mountains, New Mexico) exhibited no variation. These and previously reported karyotypes from the region had a diploid number (2n) of 56 and fundamental number (FN) of 84, which is the most commonly reported karyotype for the species.
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1 September 2009
Karyotypes of the Long-Tailed Vole (Microtus longicaudus) in Isolated Mountain Ranges of the American Southwest
Jennifer K. Frey,
Benjamin J. Frey,
Dwight W. Moore
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Western North American Naturalist
Vol. 69 • No. 3
September 2009
Vol. 69 • No. 3
September 2009
American Southwest
Chromosome
karyotype
long-tailed vole
Microtus longicaudus