Trimeresurus ayeyarwadyensis CHAN, ANUAR, SANKAR, LAW, LAW, SHIVARAM, CHRISTIAN, MULCAHY & MALHOTRA, 2023
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Trimeresurus ayeyarwadyensis
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| Higher Taxa | Viperidae, Crotalinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) |
| Subspecies | |
| Common Names | E: Ayeyarwady pit viper |
| Synonym | Trimeresurus ayeyarwadyensis CHAN, ANUAR, SANKAR, LAW, LAW, SHIVARAM, CHRISTIAN, MULCAHY & MALHOTRA 2023 |
| Distribution | Myanmar (Pyapon) Type locality: Ayeyarwady Region, Pyapon District, Bogalay Township, Mein Ma Hla Kyun Wildlife Sanctuary, Mi Gyaung Gaung Pok Camp (16°00'45.1"N, 95°19'30.6"E) |
| Reproduction | |
| Types | Holotype. CAS 219801, adult female, collected on 19 Jan. 2001 at 2025 hrs by H. Win, T. Thin, K.S. Lwin, A.K. Shein, and H. Tun. Paratypes. CAS 213587, adult male, collected on 9 Jan. 2000 from Yangon Region, Hlaw Ga Park, Mingalardon Township (17°1'36.5"N, 96°5'49.4"E) at 0800 hrs by H. Win, T. Thin, S.L. Oo, and S.W. Kyi; CAS 212245, adult female, collected on 22 Apr. 2000 from Ayeyarwady Region, vicinity of Mwe Hauk Village (16°16'34.3"N, 94°45'1.3"E) at 1935 hrs by J.B. Slowinski, G.R. Zug, R.S. Lucas, and J.V. Vindum; CAS 219783, adult male, collected on 18 Jan 2001 from Ayeyarwady Region, Pyapon District, Bogalay Township, Mein Ma Hla Kyun Wildlife Sanctuary, West Htaw Pai Camp (15°56'43.7"N, 95°19'2"E) at 2105 hrs by H. Win, T. Thin, K.S. Lwin, A.K. Shein, and H. Tun. |
| Diagnosis | Diagnosis. Trimeresurus can be distinguished from all other Asian pit-vipers by the condition of the first infralabial and nasal scale, which are at least partially fused. The new species can be diagnosed from other species of Trimeresurus by the following combination of characters: in both sexes (n = 19), 23–25 dorsal mid-body scale rows (mean 24.3 ± 0.97), 17 scale rows just anterior to vent (rarely 15 or 16) and body scales distinctly and sharply keeled; in males (n = 8), 150–170 ventral scales (mean 160.6 ± 5.6), 71–76 subcaudal scales (mean 73 ± 1.8); a minimum of 9–11 scales between supraoculars (mean 9.9 ± 0.6); between 5–9 scales touching the subocular scale (not counting preand post-oculars; mean 6.9 ± 0.9); supralabials 9–12 (mean 10.4 ± 0.8). In females (n = 11), 157–174 ventral scales (mean 165.1 ± 4.9), 52–58 subcaudal scales (mean 55 ± 2.1); a minimum of 10–12 scales between supraoculars (mean 10.8 ± 0.9); between 5–8 scales touching the subocular scale (not counting preand post-oculars; mean 6.5 ± 0.8); supralabials 10–12 (mean 10.9 ± 0.6). (Chan et al. 2023) |
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