Attributes / relations provided by
♦ 1Spermophilus saturatus, Stephan C. Trombulak, MAMMALIAN SPECIES No. 322, pp. 1-4 (1988)
♦ 2Geomys bursarius (Rodentia: Geomyidae), MATTHEW B. CONNIOR, MAMMALIAN SPECIES 43(879):104–117 (2011)
♦ 3Microtus montanus, Wendy E. Sera and Cathleen N. Early, MAMMALIAN SPECIES No. 716, pp. 110 (2003)
♦ 4Sorex cinereus, John O. Whitaker, Jr., MAMMALIAN SPECIES No. 743, pp. 19 (2004)