Attributes / relations provided by
♦ 1Tamias merriami, Troy L. Best and Nancy J. Granai, MAMMALIAN SPECIES No. 476, pp. 1-9 (1994)
♦ 2Spermophilus townsendii, Eric A. Rickart, MAMMALIAN SPECIES No. 268, pp. 1-6 (1987)
♦ 3Spermophilus tereticaudus, Kristina A. Ernest and Michael A. Mares, MAMMALIAN SPECIES No. 274, pp. 1-9 (1987)