Salvadora hexalepis, the western patch-nosed snake, is a species of non-venomouscolubridsnake, which is endemic to the southwestern United States and northern Mexico.[5]
^Boulenger, G.A. 1896. Catalogue of the Snakes in the British Museum (Natural History). Volume III., Containing the Colubridæ (Opisthoglyphæ and Proteroglyphæ),... Trustees of the British Museum (Natural History). (Taylor and Francis, Printers.) London. xiv + 727 pp. + Plates I.- XXV. (Zamenis grahamiæ Var. hexalepis, p. 622.)
^Stejneger, L., and T. Barbour. 1917. A Checklist of North American Amphibians and Reptiles. Harvard University Press. Cambridge, Massachusetts. 125 pp. (Salvadora hexalepis, p. 81.)
^Smith, H.M., and E.D. Brodie, Jr. 1982. Reptiles of North America: A Guide to Field Identification. Golden Press. New York. 240 pp. ISBN0-307-13666-3 (paperback). (Salvadora hexalepis, pp. 194-195.)
^ abWright, A.H., and A.A. Wright. 1957. Handbook of Snakes of the United States and Canada. Comstock. Ithaca and London. 1,105 pp. (in 2 volumes) (Salvadora hexalepis, pp. 651-663, Figures 190.-193. + Map 49. on p. 646.)
^ abcSchmidt, K. P., & D.D. Davis. 1941. Field Book of Snakes of the United States and Canada. G.P. Putnam's Sons. New York. 365 pp. (Salvadora, pp. 135-139.)
^Zim, H.S., and H.M. Smith. 1956. Reptiles and Amphibians: A Guide to Familiar American Species: A Golden Nature Guide. Simon and Schuster. New York. 160 pp. ("Patch-nosed snakes", p. 88.)
^Conant, R. 1975. A Field Guide to Reptiles and Amphibians of Eastern and Central North America, Second Edition. Houghton Mifflin. Boston. 429 pp. ISBN0-395-19977-8 (paperback). ("Genus Salvadora", pp. 187-188.)
Bogert, C.M. 1935. "Salvadora grahamiae virgultea, a new subspecies of the patch-nosed snake". Bull. Southern California Acad. Sci.34 (1): 88-94.
Bogert, C.M. 1939. "A Study of the Genus Salvadora, the Patch-nosed Snakes". Publ. Univ. California at Los Angeles1: 177-236.
Bogert, C.M. "Two additional races of the patch-nosed snake, Salvadora hexalepis ". American Mus. Novitates (1285): 1-14. (Salvadora hexalepis klauberi and Salvadora hexalepis mojavensis, new subspecies)
Cope, E.D. 1866. "On the REPTILIA and BATRACHIA of the Sonoran Province of the Nearctic Region". Proc. Acad. Nat. Sci. Philadelphia18: 300-314. ("Phimothyra hexalepis n. sp. nov. [sic]", p. 304.)
