Diagnosis | Diagnosis. A member of the ordinoides group, with 19-19-17 scale rows and maxil lary teeth 17 or 18, the posterior not con spicuously enlarged, although a little longer than the anterior teeth; ventrals 155 to 166 (155-156, females; 163-166, males); caudals 72 to 91 (72 to 82, females; 85 to 91, males); supralabials seven or eight; sixth labial large and not narrowed above; stripes very poorly defined as a rule, median stripe generally covering but one scale row where visible; spots between stripes small, those of the outer row usually very poorly de fined or absent; top of head dark, the color extending onto sides; supralabial region light, except for black posterior edges on most of the labials; a vaguely darker, longi tudinal line through lower temporal region. (Smith 1942: 112) |
References |
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- Rossman, D.A. & Burbrink, F.T. 2005. Species limits within the Mexican garter snakes of the Thamnophis godmani complex. Occ. Papers Mus. Nat. Science (79): 1-43 - get paper here
- Rossman, Douglas A.; Ford, Neil B. & Seigel, Richard A. 1996. The Garter Snakes: Evolution and Ecology. University of Oklahoma Press, Norman, OK, xx + 332 + pp.
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- Smith, Hobart M.; Nixon, C. William; Smith, Philip W. 1950. Mexican and Central American garter snakes (Thamnophis) in the British Museum (Natural History). Zool. J. Linnean Soc. 41 (282): 571-584 - get paper here
- Tanner, Wilmer W. 1959. A new Thamnophis from western Chihuahua with notes on four other species. Herpetologica 15 (4): 165-172 - get paper here
- Tanner, Wilmer W. 1985. Snakes of Western Chihuahua. Great Basin Naturalist 45 (4): 615-676 - get paper here
- Van Devender, Thomas R.; Lowe, Charles H. Lowe, Jr. 1977. Amphibians and reptiles of Yepomera, Chihuahua, Mexico. Journal of Herpetology 11 (1): 41-50 - get paper here
- Webb, R.G. 1984. Herpetogeography in the Mazatlán-Durango Region of the Sierra Madre Occidental, Mexico. Vetrebrate Ecology and Systematics - A ribute to Henry S. Fitch; Museum of Natural History, University of Kansas, Lawrence, pp. 217-241
- Woolrich-Piña, Guillermo A, Paulino Ponce-Campos, Jesús Loc-Barragán, Juan Pablo Ramírez-Silva, Vicente Mata-Silva, Jerry D. Johnson, Elí García-Padilla and Larry David Wilson. 2016. The herpetofauna of Nayarit, Mexico: composition, distribution, and conservation status. Mesoamerican Herpetology 3 (2): 376-448 - get paper here
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