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Higher TaxaViperidae, Crotalinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Common NamesSalazar’s pit viper 
SynonymTrimeresurus salazar MIRZA, BHOSALE, PHANSALKAR, SAWANT, GOWANDE & PATEL 2020 
DistributionIndia (Arunachal Pradesh, Assam)

Type locality: outskirts of Pakke Tiger Reserve, 0.64 nautical miles (1.19 km) north of Seijosa, East Kameng district, Arunachal Pradesh (26.968790N, 93.013984E, elevation 172 m a.s.l, datum WGS84), India.  
TypesHolotype. BNHS 3554, adult male, collected by Harshal Bhosale, Pushkar Phansalkar, Mandar Sawant, and Zeeshan Mirza on 1 July 2019.
Paratype. BNHS 3555, adult female same data as for the holotype but collected on 5 July 2019.
Additional specimens: ZMUC 
DiagnosisDiagnosis. A species of the genus Trimeresurus with (1) 1st supralabial fused with nasal; (2) 19–21 moderately keeled dorsal scale rows at midbody; (3) dorsal colouration greenish yellow in both sexes; (4) an orange to reddish stripe extends from the posterior borders of the preocular, running through the lower margin of the eyes to the lateral side of the nape in males; (5) ventrolateral stripe predominantly yellow with a faint orange at the base in males, yellow in females; (6) tail to total length ratio (TaL/TL) 0.18 in males, 0.14 in females; (7) short, bilobed hemipenis reaching 8th caudal scale; (8) 6 palatine, 15 pterygoid and 19 dentary teeth.

Comparison. The new species is here compared to all species of the genus Trimeresurus for differing and non-overlapping characters: first supralabial fused with nasal (vs separate in T. macrolepis Beddome, 1862, T. trigonocephalus (Latreille, 1801), T. malabaricus (Jerdon, 1854), T. strigatus Gray, 1842, T. gramineus (Shaw, 1802), T. stejnegeri Schmidt, 1925, T. hageni (Lidth de Jeude, 1886), T. phuketensis Sumontha, Kunya, Pauwels, Nitikul & Punnadee, 2011, T. nebularis Vogel, David & Pawels, 2004, T. truongsonensis Orlov, Ryabov, Thanh & H. Cuc, 2004, T. gunaleni Vogel, David & Sidik, 2014, T. sabahi Regenass & Kramer, 1981, T. popeorum, T. yingjiangensis Chen, Zhang, Shi, Tang, Guo, Song & Ding, 2019, T. sichuanensis (Guo & Wang, 2011), T. nebularis Vogel, David & Pauwels, 2004, and T. yunnanensis); dorsal scale rows 19–21 (vs >23 rows in T. andersoni Theobald, 1868, T. cantori (Blyth, 1846), T. erythrurus, T. gracilis Oshima, 1920, T. gumprechti, T. labialis (Steindachner, 1867), T. purpureomaculatus (Gray, 1832), T. vogeli David, Vidal & Pawels, 2001, T. stejnegeri, and T. arunachalensis); eye sized in relation to head not large, DEYE 2.33 (DEYE 4.03–4.46 relatively large eyes in T. cardomomensis Malhotra, Thrope, Mrinalini & Staurt, 2011, T. macrops Karmer, 1977, and T. rubeus Malhotra, Thrope, Mrinalini & Staurt, 2011), dorsum green with a yellow tinge bearing a yellowish ventrolateral stripe along the body lacking any dorsal markings (vs dorsum reddish brown to grey, black, or green with dark markings in T. tibetanus Huang, 1982, T. flavomaculatus (Gray, 1842), T. fasciatus (Boulenger, 1896), T. arunachalensis, T. malabaricus, T. strigatus, T. kanburiensis Smith, 1943, T. puniceus (Boie, 1827), T. schultzei Griffin, 1909, T. mutabilis Stoliczka, 1870, T. honsonensis (Grismer, Ngo & Grismer, 2008), T. malcolmi Loveridge, 1938, T. wiroti Trutnau, 1981, T. venustus, Vogel, 1991, T. mcgregori Taylor, 1919, T. sumatranus (Raffles, 1822), T. andersonii, T. labialis, T. andalasensis David, Vogel, Vijaykumar & Vidal, 2006, T. borneensis (Peters, 1872), T. brongersmai Hoge, 1968, T. cantori); 167–171 ventrals (vs 136–150 in T. brongersmai, 141–149 in T. gracilis, 133–143 in T. macrolepis, 143–158 in T. malabaricus, 138–149 in T. medoensis, and 128–150 in T. strigatus).
The new species is most similar to T. septentrionalis, T. insularis Kramer, 1977, and T. albolabris in its scalation but differs in bearing an orange to reddish stripe from the lower margin of the eye to the posterior of the posterior border of the mouth in males (vs a white stripe from the posterior border of the nasal to posterior part of the head in T. septentrionalis and T. albolabris); hemipenis short and bilobed (vs long and deeply forked in T. septentrionalis and T. albolabris); palatine with six teeth (vs five in T. albolabris, T. insularis, and T. septentrionalis); pterygoid with 15 teeth (vs 11 in T. septentrionalis, 16 in T. insularis, and 12 in T. albolabris); 19 dentary teeth (vs 11 in T. septentrionalis, 12 in T. albolabris, and 14 in T. insularis). A comparison of selected characters is presented in Table 1 (Mirza et al. 2020). 
EtymologyThe specific epithet is a noun in apposition for J.K. Rowling’s fictional Hogwarts School of Witchcraft and Wizardry’s co-founder, Salazar Slytherin, in Harry Potter. He was a Parselmouth that links him to serpents. 
  • 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, Bhosale HS, Phansalkar PU, Sawant M, Gowande GG, Patel H 2020. A new species of green pit vipers of the genus Trimeresurus Lacépède, 1804 (Reptilia, Serpentes, Viperidae) from western Arunachal Pradesh, India. Zoosystematics and Evolution 96(1): 123-138 - get paper here
  • Rathee, Yashpal Singh; Jayaditya Purkayastha, Siddharth Dalal, Hmar Tlawmte Lalremsanga 2021. First record of Salazar’s Pitviper (Trimeresurus salazar) from Meghalaya, India, with comments on hemipenes. Reptiles & Amphibians 28 (1): 131-136 - get paper here
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