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Opisthotropis tamdaoensis ZIEGLER, DAVID & VU, 2008

IUCN Red List - Opisthotropis tamdaoensis - Data Deficient, DD

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Higher TaxaColubridae (Natricinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Common Names 
SynonymOpisthotropis tamdaoensis ZIEGLER, DAVID & VU 2008
Oligodon tamdaoensis — NGUYEN et al. 2009: 24
Opisthotropis tamdaoensis — NGUYEN et al. 2009: 469
Opisthotropis tamdaoensis — WALLACH et al. 2014: 510 
DistributionN Vietnam (Tam Dao, Vinh Phuc Province)

Type locality: Bac (Silver) stream, Tam Dao, Vinh Phuc Province, northern Vietnam, ca. 750 m elevation.  
TypesHolotype: VNUH 010606, an adult male, collected by local people in June 2006. 
DiagnosisDiagnosis: A species of the genus Opisthotropis, characterized by the combination of the following characters: (1) nasal not (completely) divided below nostril; (2) 1 – 2 loreals, not in contact with internasals; (3) 1 preocular; 2 postoculars; 1 subocular; (4) 2 anterior and 3 – 4 posterior temporals; (5) existence of an additional scale, that is sur rounded by the lower anterior temporal, the lower postocular, subocular, and two supralabials; (6) 8 – 9 supralabials, 0 or 5th in contact with eye, 5 – 6 right below the eye; (7) 9 – 10 infralabials; (8) f irst pair of chin shields longer than the second pair; (9) dorsal scales smooth anteriorly, keeled posteriorly; in 1917-17 rows; (10) 4 pre- and 171 ventrals; precloacal divided; 49 þ divided subcaudals; (11) uniform dark olive grey dorsum, with a dark longitudinal lateral stripe amidst the dark dorsal colouration; ventral side pale, only tip of the subcaudal region with dark mottling. 
CommentHabitat: aquatic, inhabiting flowing streams.

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

Behavior: nocturnal 
Etymologynamed after the type locality. 
  • 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
  • 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, T., RAUHAUS, A., TRAN, T.D., PHAM, C.T., VAN SCHINGEN, M., DANG, P.H., LE, M.D. & NGUYEN, T.Q. 2015. Die Amphibien- und Reptilienfauna der Me-Linh-Biodiversitätsstation in Nordvietnam. Sauria 37 (4): 11-44 - 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
  • Ziegler, Thomas; Tim N. Ziegler, Julia Peusquens, Patrick David, Thanh N. Vu, Cuong T. Pham, Truong Q. Nguyen, & Minh D. Le 2017. Expanded morphological definition and molecular phylogenetic position of the Tam Dao mountain stream keelback Opisthotropis tamdaoensis (Squamata: Natricidae) from Vietnam. Revue suisse de Zoologie 124(2): 377-389
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