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Trimeresurus davidi CHANDRAMOULI, CAMPBELL & VOGEL, 2020

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Higher TaxaViperidae, Crotalinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common Names 
SynonymTrimeresurus davidi CHANDRAMOULI, CAMPBELL & VOGEL 2020
Trimeresurus albolabris – VIJAYAKUMAR & DAVID 2006
Trimeresurus albolabris – SMITH 1943 (part.)
Trimeresurus albolabris – VOGEL 2006 (part.)
Trimeresurus albolabris – VOGEL et al. 2014 (part.)
Trimeresurus (Trimeresurus) davidi — MIRZA et al. 2023 
DistributionIndia (Car Nicobar)

Type locality: Chuckchucka Village (9.2161°N, 92.8109°E, 14 m asl), Car Nicobar  
Reproduction 
TypesHolotype. BNHS 3304, an adult female, collected by a group of Nicobari men (fide Vijayakumar and David 2006).
Paratypes. DOSMB 05104, an adult male from Chuckchucka Village, Car Nicobar; NHMUK 1936.7.7.40, NHMUK 1936.7.7.41, NHMUK 1936.7.7.42, (three adult females from ‘Car Nicobar, Nicobar Is.’), NHMUK 1936.7.7.46 an unsexed adult from ‘Car Nicobar, Nicobar Is.,’ NHMUK 1936.7.7.47 and NHMUK 1936.7.7.48 (two adult males from ‘Nicobar Is.’ and ‘Andaman Is.’ [doubtful], respectively), collected during Lord Moyne’s expedition to the Nicobar Islands. 
DiagnosisDiagnosis: Trimeresurus davidi sp. nov. is an arboreal member of the genus Trimeresurus restricted to the Car Nicobar Island of the Nicobar archipelago, characterized by: medium to large sized body (277–835 mm SVL); dorsal scales in a series of 21–25:21–23:15–17 rows; nasal partly fused with the first supralabial; 166–179 ventrals; 46–70 subcaudals; one preocular; 2–3 postoculars; 10–12 supralabials; 12–15 infralabials; two internasals usually in contact with each other; 11–14 cephalic scales; relative tail length (TaL/TL) ranging from 0.143–0.20; dorsal and ventral verdant green in color, lacking white ventrolateral stripes; males with a white supralabial streak, bordered by a reddish tinge above; a pair of white and red stripes along the sides of the tail in both males and females; a reddish brown colored tail and a greenish iris; hemipenis reaching the 13th caudal plate.


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CommentDistribution: See map in Vogel et al. 2023: 529 (Fig. 5) for localities. 
EtymologyNamed after Patrick David, eminent French reptile taxonomist, for his immense contribution to the systematics of Asian pit vipers and, in particular, to the Nicobar snake fauna. 
References
  • Chandramouli SR, Campbell PD, Vogel G. 2020. A new species of green pit viper of the genus Trimeresurus Lacépède, 1804 (Reptilia: Serpentes: Viperidae) from the Nicobar Archipelago, Indian Ocean. Amphibian & Reptile Conservation 14(3) [Taxonomy Section]: 169–176 (e264) - get paper here
  • Mirza ZA, H. T. Lalremsanga, Bhosale H, Gowande G, Patel H, Idiatullina SS, Poyarkov NA 2023. Systematics of Trimeresurus popeiorum Smith, 1937 with a revised molecular phylogeny of Asian pitvipers of the genus Trimeresurus Lacépède, 1804 sensu lato. Evolutionary Systematics 7(1): 91-104 - 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.
  • Vijayakumar, S. P. and Patrick David 2006. Taxonomy, Natural History, and Distribution of the Snakes of the Nicobar Islands (INDIA), based on new materials and with an Emphasis on endemic species. Russ. J. Herpetol. 13 (1): 11 – 40
  • Vogel, G. 2006. Venomous snakes of Asia - Giftschlangen Asiens. Edition Chimaira, Terralog 14, 148 p. - get paper here
  • VOGEL, G., MALLIK, A. K., CHANDRAMOULI, S., SHARMA, V., & GANESH, S. 2022. A review of records of the Trimeresurus albolabris Gray, 1842 group from the Indian subcontinent: expanded description and range extension of Trimeresurus salazar, redescription of Trimeresurus septentrionalis and rediscovery of historical specimens Zootaxa 5175 (3): 343-366 - get paper here
  • VOGEL, GERNOT; PATRICK DAVID, S. R. CHANDRAMOULI 2014. On the systematics of Trimeresurus labialis Fitzinger in Steindachner, 1867, a pitviper from the Nicobar Islands (India), with revalidation of Trimeresurus mutabilis Stoliczka, 1870 (Squamata, Viperidae, Crotalinae). Zootaxa 3786 (5): 557–573 - get paper here
  • VOGEL, GERNOT; TAN VAN NGUYEN, & PATRICK DAVID 2023. A new green pitviper of the Trimeresurus albolabris complex (Reptilia, Serpentes, Viperidae) from central and southern Myanmar. Zootaxa 5357 (4): 515–554 - get paper here
 
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