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Opisthotropis spenceri SMITH, 1918

IUCN Red List - Opisthotropis spenceri - Data Deficient, DD
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Higher TaxaColubridae (Natricinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Spencer’s Stream Snake, Smith's Mountain Keelback
G: Spencers Bachnatter 
SynonymOpisthotropis spenceri SMITH 1918: 13
Opisthotropis spenceri — SMITH 1943: 333
Opisthotropis spenceri — BROWN & LEVITON 1961
Opisthotropis spenceri — TAYLOR 1965: 839
Opisthotrophis [sic] spenceri — CHAN-ARD et al. 1999: 35
Opisthotropis spenceri — DAVID et al. 2011
Opisthotropis spenceri — WALLACH et al. 2014: 510 
DistributionThailand

Type locality: “Muang Ngow, N. Siam” = Ngao, Lampang Province, N Thailand.  
Reproductionoviparous 
TypesHolotype: BMNH 1946.1.15.31, adult female 
DiagnosisDiagnosis: Scales in 17 rows; prefrontal single; loreal in contact with internasal; seven supralabials, fourth and fifth entering orbit; frontal four times wider than supraocular; first chinshield much larger than second; no enlarged posterior fangs. (Taylor 1965: 839)


Additional details (1252 characters) are available for collaborators and contributors. Please contact us for details. 
CommentHabitat: aquatic, inhabiting flowing streams.

Diet: fishes, frogs, tadpoles, freshwater shrimp and earthworms.

Behavior: nocturnal

Similar species: Opisthotropis durandi

Abundance: Since its discovery in September 1917, only three specimens of O. spenceri have been recorded, all from the type locality (Nabhitabhata et al. 2004, Teynié et al. 2014). 
References
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here
  • Brown,W.C. & Leviton,A.E. 1961. Discovery of the snake genus Opisthotropis in the Philippine Islands, with description of a new species. Occasional Papers of the Natural History Museum of Stanford University (8): 1-11 - get paper here
  • Chan-ard, T., Parr, J.W.K. & Nabhitabhata, J. 2015. A field guide to the reptiles of Thailand. Oxford University Press, NY, 352 pp. [see book reviews by Pauwels & Grismer 2015 and Hikida 2015 for corrections] - get paper here
  • Chan-ard,T.; Grossmann,W.; Gumprecht,A. & Schulz,K. D. 1999. Amphibians and reptiles of peninsular Malaysia and Thailand - an illustrated checklist [bilingual English and German]. Bushmaster Publications, Würselen, Gemany, 240 pp. [book review in Russ. J Herp. 7: 87] - get paper here
  • DAVID, PATRICK; CUONG THE PHAM, TRUONG QUANG NGUYEN & THOMAS ZIEGLER 2011. A new species of the genus Opisthotropis Günther, 1872 (Squamata: Natricidae) from the highlands of Kon Tum Province, Vietnam. Zootaxa 2758: 43–56 - get paper here
  • nan 2014. Opisthotropis spenceri SMITH, 1918 (SERPENTES: NATRICIDAE): THE THIRD AND FOURTH SPECIMENS. nan - get paper here
  • Smith, M.A. 1918. Description of a new snake (Opisthotropis spenceri) from Siam. J. Nat. Hist. Soc. Siam 3: 13 - get paper here
  • Smith, M.A. 1943. The Fauna of British India, Ceylon and Burma, Including the Whole of the Indo-Chinese Sub-Region. Reptilia and Amphibia. 3 (Serpentes). Taylor and Francis, London. 583 pp.
  • Taylor,E.H. 1965. The serpents of Thailand and adjacent waters. Univ. Kansas Sci. Bull. 45 (9): 609-1096 - get paper here
  • TEYNIÉ, ALEXANDRE; ANNE LOTTIER, PATRICK DAVID, TRUONG QUANG NGUYEN & GERNOT VOGEL 2014. A new species of the genus Opisthotropis Günther, 1872 from northern Laos (Squamata: Natricidae). Zootaxa 3774 (2): 165–182 - get paper here
  • Wallach, Van; Kenneth L. Williams , Jeff Boundy 2014. Snakes of the World: A Catalogue of Living and Extinct Species. [type catalogue] Taylor and Francis, CRC Press, 1237 pp.
  • YANG, JIAN-HUAN; YIK-HEI SUNG & BOSCO PUI-LOK CHAN 2013. A new species of the genus Opisthotropis Günther, 1872 (Squamata: Colubridae: Natricinae) from Guangdong Province, China. Zootaxa 3646 (3): 289–296 - get paper here
  • YANG, JIAN-HUAN; YING-YONG WANG, BING ZHANG, MICHAEL WAI-NENG LAU & WEN-HAO CHOU 2011. Revision of the diagnostic characters of Opisthotropis maculosa Stuart and Chuaynkern, 2007 with notes on its distribution and variation, and a key to the genus Opisthotropis (Squamata: Natricidae). Zootaxa 2785: 61–68 - get paper here
  • Ziegler, Thomas; Patrick David, Vu Ngoc Thanh 2008. A new natricine snake of the genus Opisthotropis from Tam Dao, Vinh Phuc Province, northern Vietnam (Squamata, Colubridae). Zoosystematics and Evolution 84 (2): 197 -203 - get paper here
 
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