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Trimeresurus kraensis IDIIATULLINA, PAWANGKHANANT, SUWANNAPOOM, TAWAN, CHANHOME, NGUYEN, DAVID, VOGEL & POYARKOV, 2024

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Higher TaxaViperidae, Crotalinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common Names 
SynonymTrimeresurus kraensis IDIIATULLINA, PAWANGKHANANT, SUWANNAPOOM, TAWAN, CHANHOME, NGUYEN, DAVID, VOGEL & POYARKOV 2024
Trimeresurus venustus – PAUWELS et al. 2013: 280 (partim)
Trimeresurus venustus – SUMONTHA et al. 2021: 320 (partim)
Trimeresurus cf. venustus – SUMONTHA et al. 2021: 321, fig. 9B.
Trimeresurus cf. venustus 1 – IDIIATULLINA et al. 2023: 699, 704 
DistributionThailand (Chumphon)

Type locality: Chumphon Province, Muang District, Banna Subdistrict, Wat [= Temple] Tham Sanook and its cave Tham Sanook, THAILAND; 10.48089° N, 99.07323° E; 65 m a.s.l.  
Reproduction 
TypesHolotype: AUP-02036, adult female; 27 Jul. 2022; P. Pawangkhanant, N.A. Poyarkov and C. Suwannapoom leg.; .
Paratypes: ZMMU Re-17664 (field label NAP-11581), 1 adult male; same collection data as for holotype; 27 Jul. 2022; 1 ♀ adult; same collection data as for holotype; 27 Jul. 2022; ZMMU Re-17666 (field label NAP-11582) • 1 ♀ subadult; same collection data as for holotype. 
DiagnosisDiagnosis: The new species is assigned to the subgenus Trimeresurus based on the following morphological attributes: a long papillose hemipenis and partially fused first supralabial and nasal scales (Malhotra & Thorpe 2004a; Idiiatullina et al. 2023). The new species Trimeresurus kraensis sp. nov. is distinguished from all other species of the subgenus Trimeresurus by the following combination of morphological characters: (1) a dark olive-green or bottle green dorsum; (2) dorsal pattern consisting of about 60 reddish-brown or purple blotches, transversally elongate but not reaching the lower part of the flanks, two or three series of dark brown spots forming a discontinuous pattern on the 1st to 3rd dorsal scale rows and white vertebral spots present in males, located approximately on every two or four dorsal scales; (3) venter creamish-green with some dark brown spots; (4) tips of the ventral plates both cream and dark brown, forming a discontinuous, alternating pale and dark, ventrolateral stripe; (5) males with a reddish-brown postocular stripe; (6) internasals generally in contact behind the posteror tip of the rostral; (7) single large supraocular scale; (8) iris pale copper, (9) tail brown with dark purplish-brown crossbars; (10) dorsal scales in 21–21–15 rows; (11) ventral scales 167 in a single male, 169–171 in females; (12) subcaudal scales 62 in a single male, 52–54 in females, all paired. (IDIIATULLINA et al. 2024) 
CommentDistribution: see map in Pawangkhanant et al. 2025: 2 (Fig 1), Pawangkhanant et al. 2025 (516 (Fig. 1). 
References
  • Idiiatullina, S. S., Pawangkhanant, P., Suwannapoom, C., Tawan, T., Chanhome, L., Van Nguyen, T., ... & Poyarkov, N. A. 2024. Another new species of karst-associated pitviper (Serpentes, Viperidae: Trimeresurus) from the Isthmus of Kra, Peninsular Thailand. European Journal of Taxonomy, 930, 20-52 - get paper here
  • Pawangkhanant P. et al. 2025. A snake can change its finery: a new cryptic species of the Trimeresurus kanburiensis complex (Reptilia: Serpentes: Viperidae) from central Thailand with an unusual ontogenetic color change. Zootaxa, 5621(5): 514-546 - get paper here
  • Pawangkhanant, P., Idiiatullina, S. S., Smits, T., Dugdale, I., Pierce, A., Suwannapoom, C., & Poyarkov, N.A. 2025. A NEW SPECIES OF KARST-ASSOCIATED PITVIPER OF THE Trimeresurus kanburiensis COMPLEX (SQUAMATA: VIPERIDAE) FROM EASTERN THAILAND. TAPROBANICA 14 (1): 1–15 - get paper here
 
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