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| Trimeresurus uetzi Vogel, Nguyen & David, 2023 Photos by Hla Tun (CAS-NWCD), Myo Mint Oo, D. Thirainda, L. L. Grismer, May Thu Chit |
Abstract
In the frame of our investigations on the systematics of the complex of species of Trimeresurus albolabris, we came across specimens from Myanmar variously referred to as Trimeresurus albolabris Gray, 1842 or T. septentrionalis Kramer, 1977 in the literature. We describe a new species of green pitviper of the genus Trimeresurus Lacépède, 1804 from central and southern Myanmar based on molecular analyses drawn from previously published phylogenies and new morphological data. This new species, Trimeresurus uetzi sp. nov., is broadly similar to both Trimeresurus albolabris and T. septentrionalis, but it differs from these latter species by a series of morphological characters such as presence of white pre- and postocular streaks in male, iris copper in male or green gold in female, more ventral plates, and a much shorter hemipenis. We compare this new species with Trimeresurus albolabris as currently defined and other species of this complex. We also emphasize the need for additional integrated studies on Trimeresurus albolabris sensu lato populations distributed in southern Indochina and Sundaland.
Keywords: Reptilia, Crotalinae, new species, morphology, Indo-Burma region, Trimeresurus septentrionalis
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| Trimeresurus uetzi sp. nov. in preservative, specimen CAS 243024, Holotype, male. A. General dorsal view. – B. General ventral view. – C. Lateral view of the head, right side. – D. Lateral view of the head, left side. – E. Dorsal view of the head. – F. Ventral view of the head. – G. Ventral view of the tail with the everted hemipenes. – H. Dorsal view of the base of the tail. Photos by G. Vogel. |
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| Trimeresurus uetzi sp. nov., in life. A. Myanmar (no specific locality). – B. Yesagyo, Magway Region, Myanmar. – C & D. Popa Mountain, Mandalay Region, Myanmar. – E & F. Kandaw, Myingchan, Mandalay Region, Myanmar. Photos by A: Hla Tun (CAS-NWCD), B: Myo Mint Oo, and C: Drthakuna Thirainda, D: Larry Lee Grismer, E & F: May Thu Chit. |
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| Lateral view of the head, right & left side, respectively of the Trimeresurus uetzi sp. nov. in preservative: A. Specimen CAS 232480 (paratype, male); B. Specimen CAS 243055 (paratype, male); C. Specimen CAS 242723 (male); D. Specimen CAS 210109 (paratype, female); E. Specimen CAS 215472 (paratype, female); F. Specimen CAS 215540 (paratype, female). Photos by G. Vogel. |
Gernot Vogel, 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. DOI: 10.11646/zootaxa.5357.4.3
