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Thamnophis godmani (GÜNTHER, 1894)

IUCN Red List - Thamnophis godmani - Least Concern, LC

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Higher TaxaColubridae (Natricinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) 
Subspecies 
Common NamesE: Godman's Garter Snake
G: Godmans Strumpfbandnatter 
SynonymTropidonotus godmani GÜNTHER 1894: 133
Eutaenia godmanii — COPE 1900:1232
Thamnophis scalaris godmani — SMITH 1942: 98
Thamnophis scalaris godmani — SMITH & SMITH 1976
Thamnophis godmani — ROSSMAN in VARKEY 1979:2
Thamnophis godmani — LINER 1994
Thamnophis godmani — ROSSMAN & BURBRINK 2005
Thamnophis godmani — WALLACH et al. 2014: 722
Thamnophis godmani — MATA-SILVA et al. 2015 
DistributionMexico (Guerrero, Oaxaca, Puebla, Veracruz)

Type locality: Mexico, Guerrero, Omilteme and Amula 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. 
TypesLectotype: BMNH 1946.1.21.81 (designated by ROSSMAN & BURBRINK 2005) 
CommentHabitat: Thamnophis godmani appears to be confined to pine-oak forest and cloud forest in the Sierra Madre del Sur of Guerrero. Recorded elevations that are probably valid range from 1768-2438 m. A record from Acahuizotla at 853 m (TCWC 9533) is suspect (fide ROSSMAN & BURBRINK 2005).

Tropidonotus godmani (Günther, 1894) was soon synonymized with Thamnophis cyrtopsis in Ruthven’s (1908) classic monograph on the genus Thamnophis.

Diagnosis. Thamnophis godmani can be distinguished from all other Mexican species of the genus by the following combination of characteristics: (1) maximum DSR 17; (2) maxillary teeth 17-21; (3) top of the head unpatterned; (4) two rows of relatively small black spots between light vertebral and lateral stripes; (5) nuchal blotches usually predominantly black; (6) prominence of black bar along posterior suture of SL 5 equal to, or greater than, bar along SL 6 and 7 suture; (7) V averaging 144 in males, 138 in females; (8) SC averaging 79 in males, 71 in females; (9) tail relatively long (mean T/TL 27% in males, 26% in females); (10) prefrontal suture usually slightly shorter than internasal suture (mean PFL/INL 94%); (11) muzzle tip usually very broad (mean INR/NR 134%); (12) anterior and posterior nasals usually subequal in length; (13) parietals shortest of all Thamnophis species (mean FL/PL 88%); and (14) frontal usually relatively narrow posteriorly (mean FWP/FWA 72%). 
EtymologyNamed after F. D. Godman, who obtained the type series for the British Museum (Natural History). 
References
  • Casas-Andreu, G., F.R. Méndez-De la Cruz and X. Aguilar-Miguel. 2004. Anfibios y Reptiles; pp. 375–390, in A.J.M. García-Mendoza, J. Ordoñez and M. Briones-Salas (ed.). Biodiversidad de Oaxaca. Instituto de Biología, UNAM-Fondo Oaxaqueño para la Conservación de la Naturaleza-World Wildlife Fund, México, D. F.
  • Günther, A. C. L. G. 1885. Reptilia and Batrachia. Biologia Centrali-Américana. Taylor, & Francis, London, 326 pp. [published in parts from 1885-1902; reprint by the SSAR 1987] - get paper here
  • Hallmen, M. & Chlebowy, J. 2001. Strumpfbandnattern. Natur und Tier Verlag (Münster), 192 pp. - get paper here
  • Heimes, P. 2016. Snakes of Mexico. Chimaira, Frankfurt, 572 pp
  • Liner, E.A. 1994. Scientific and common names for the Amphibians and Reptiles of Mexico in English and Spanish. Herpetological Circular 23: 1-113
  • Mata-Silva, Vicente, Jerry D. Johnson, Larry David Wilson and Elí García-Padilla. 2015. The herpetofauna of Oaxaca, Mexico: composition, physiographic distribution, and conservation status. Mesoamerican Herpetology 2 (1): 6–62 - get paper here
  • Peterson, A.T. et al. 2004. A preliminary biological survey of Cerro Piedra Larga, Oaxaca, Mexico: Birds, mammals, reptiles, amphibians, and plants. Anales del Instituto de Biología, Universidad Nacional Autónoma de México, Serie Zoología 75(2): 439-466
  • 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, 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.
  • 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
  • Smith,H.M. & Smith,R.B. 1976. Synopsis of the Herpetofauna of Mexico. Vol. III. Source analysis and index for Mexican reptiles. John Johnson, North Bennington, Vermont.
  • 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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