Attributes / relations provided by
♦ 1Sylvilagus audubonii, Joseph A. Chapman and Gale R. Willner, MAMMALIAN SPECIES No. 106, pp. 1-4 (1978)
♦ 2Sylvilagus nuttallii, Joseph A. Chapman, MAMMALIAN SPECIES No. 56, pp. 1-3 (1975)
♦ 3Thomomys townsendii, B. J. Verts and Leslie N. Carraway, MAMMALIAN SPECIES No. 719, pp. 16 (2003)