ii + 40. The San Francisco garter snake (Thamnophis sirtalis tetrataenia) is a slender, colorful snake in the Colubridae family, which includes most of the species of snakes found in the western United States. Author(s): Fox, Wade. Year: 1955. Journal: Herpetologica. This astonishing snake occurs in a narrow strip along (parts of) the Californian coast. (44) Common gartersnake (Thamnophis sirtalis), except San Francisco gartersnake (Thamnophis sirtalis tetrataenia) and South Coast gartersnake (Thamnophis sirtalis spp. (Summary below adapted from text by from Don Roberson) Description. The first and only San Francisco Garter Snakes (Thamnophis sirtalis tetrataenia) were imported to Europe in 1990/91. It is also a subspecies [tetrataenia] of what is known as the Common Garter Snake Thamnophis sirtalis: a species found across the United States and into southern Canada. 1996), seven of which occur in the western U.S. (Stebbins 1966, 1985, 2003). Genetic and environmental variation in the timing of the reproductive cycles of male garter snakes. Fox, W. 1952b. Fox, W. 1954. Basic Species Information STATUS. Sorry, Americans, you can't keep this one. It's endangered. San Francisco garter snake (Thamnophis sirtalis tetrataenia) Endemic to the San Francisco Bay Area, this snake's bright teal underside, red and black stripes, and red head have made it famous for its striking coloration. This subspecies of Thamnophis sirtalis is high ranking in the list of most beautiful and colorful garter snakes. There are 13 recognized subspecies based on color pattern variation (Rossman et al. Standard Common and Current Scientific Names for North American Amphibians and Reptiles, Fourth Edition. Fox, W. 1951. Thamnophis sirtalis tetrataenia. Pages: 176. Collins, J. T., 1997: null. DESCRIPTION. Journal of Morphology 90: 481-554. Copeia 1951(4): 257-267. Endangered. The beginning in Europa. Feeding the San Francisco garter snake. Seasonal variation in the male reproductive system of Pacific coast garter snakes. This species is in danger of extinction throughout all or a significant portion of its range. San Francisco Garter Snake (Thamnophis sirtalis ssp. But as a result most authors do confirm with the prediction of WALLS (1995), that Thamnophis sirtalis tetrataenia will be extincted in nature by the turn of the century. ): See Special Closure (f)(10) (45) Terrestrial gartersnake (Thamnophis elegans) (46) Sierra gartersnake (Thamnophis couchii) (47) Aquatic gartersnake (Thamnophis atratus) The San Francisco garter snake is often called the most beautiful snake in the United States. The San Francisco garter snake (Thamnophis sirtalis tetrataenia) is federally listed as endangered. 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