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Thamnophis postremus SMITH, 1942

IUCN Red List - Thamnophis postremus - Least Concern, LC

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Higher TaxaColubridae (Natricinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) 
Subspecies 
Common Names 
SynonymThamnophis cyrtopsis postremus SMITH 1942: 109
Thamnophis eques postremus — SCHMIDT 1947
Thamnophis postremus — ROSSMAN et al. 1996
Thamnophis postremus — DE QUEIROZ et al. 2002
Thamnophis postremus — LINER 2007
Thamnophis postremus — WALLACH et al. 2014: 724 
DistributionMexico (Michoacan)

Type locality: El Sabino, Michoacan. Map legend:
TDWG region - Region according to the TDWG standard, not a precise distribution map.

NOTE: TDWG regions are generated automatically from the text in the distribution field and not in every cases it works well. We are working on it.
 
Reproductionovoviviparous. 
TypesHolotype: FMNH 120235 (was EHT-HMS 5275, H.M. Smith). 
CommentDiagnosis. Similar to e. eques, except ventrals fewer, 138 to 141 in the only specimens known (4 females) ; caudals 71 to 72; supralabials 7 to 8; lateral light stripes not apparent; middorsal stripe but very little lighter than ground color, scarcely or not evident; dark spots very much reduced, al­ ternating with each other in two series on either side; middorsum not traversed by spots; outer row of dark spots on first and second scale rows greatly reduced, generally scarcely visible; no distinct dark spots on venter. (Smith 1942: 109). 
References
  • Heimes, P. 2016. Snakes of Mexico. Chimaira, Frankfurt, 572 pp
  • Liner, Ernest A. 2007. A CHECKLIST OF THE AMPHIBIANS AND REPTILES OF MEXICO. Louisiana State University Occasional Papers of the Museum of Natural Science 80: 1-60 - get paper here
  • Queiroz, Alan de; Robin Lawson and Julio A. Lemos-Espinal 2002. Phylogenetic Relationships of North American Garter Snakes (Thamnophis) Based on Four Mitochondrial Genes: How Much DNA Sequence Is Enough?. Molecular Phylogenetics and Evolution 22: 315-329 - 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.
  • Schmidt, Karl P.;Shannon, Frederick A. 1947. Notes on amphibians and reptiles of Michoacan, Mexico. Zoological Series of Field Museum of Natural History 31 (9): 63-85
  • Smith, Hobart M. 1942. The synonymy of the garter snakes (Thamnophis), with notes on Mexican and Central American species. Zoologica, Scientific Contributions of the New York Zoological Society 27 (3 and 4): 97-123
  • Wallach, Van; Kenneth L. Williams , Jeff Boundy 2014. Snakes of the World: A Catalogue of Living and Extinct Species. Taylor and Francis, CRC Press, 1237 pp.
 
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