Genus Spermophilus

Five sciurid taxa from Porcupine Cave are assigned to the genus Spermophilus, a large and extremely successful group of ground-dwelling squirrels especially diverse today in western

North America (Hall, 1981). One species is of uncertain sub-generic placement; others represent the subgenera S. (Callo-spermophilus), probably S. (Otospermophilus), and S. (Spermo-philus) (two species). Three of these five taxa are known from only one or two specimens; the other two are well represented.

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