Trimeresurus cyanolabris IDIIATULLINA, NGUYEN, BRAGIN, PAWANGKHANANT, LE, VOGEL, DAVID & POYARKOV, 2024
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Trimeresurus cyanolabris
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| Higher Taxa | Viperidae, Crotalinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) |
| Subspecies | |
| Common Names | E: Blue-lipped green Pitviper Russian: Golubogubaya bambukovaya kufiya Vietnamese: Rắn lục mép xanh dương |
| Synonym | Trimeresurus cyanolabris IDIIATULLINA, NGUYEN, BRAGIN, PAWANGKHANANT, LE, VOGEL, DAVID & POYARKOV 2024 Trimeresurus albolabris — NEMES et al. 2013: 320 (non Trimeresurus albolabris GRAY 1842) Trimeresurus albolabris — NGUYEN et al. 2019: 40 (in part) Trimeresurus macrops — HOANG et al. 2019: 90 (non Trimeresurus macrops KRAMER 1977) Trimeresurus (Trimeresurus) macrops — POYARKOV et al. 2023: 391 (in part). Trimeresurus stejnegeri — HOANG et al. 2019: 91 (non Trimeresurus stejnegeri SCHMIDT 1925) |
| Distribution | Vietnam (Ninh Thuan) Type locality: Nui Chua National Park in thai An Village, Vinh hai Commune, Ninh hai District, Ninh Thuan Province, Vietnam (11.77757°N, 109.17603°E; altitude 155 m a.s.l.) |
| Reproduction | |
| Types | Holotype. ZMMu re-17679 (field ID NAP-13705), adult male, collected by N.A. Poyarkov and A.M. Bragin from the ground on the bank of a mountain stream on March 8, 2023. Paratypes (n = 9). ZMMu re-17678 (field ID NAP-13704), adult male, collected on March 8, 2023, from the same location as the holotype; ZMMu re-17680–81 (field ID NAP-13229–30), two adult females, collected by N.A. Poyarkov and D. X. le on January 6, 2023, from the valley of Nuoc Ngot river (11.778°N, 109.176°E; altitude 280 m a.s.l.), ca. 3 km south-west from Nuoc Ngot Beach, on the territory of Nui Chua N.P., thai An Village, Vinh hai Commune, Ninh hai District, Ninh thuan Province, southern Vietnam; ZMMu re-17682 (field ID NAP-13643), adult female, collected from Nui Chua N.P. in thai An Village, Vinh hai Commune, Ninh hai District, Ninh thuan Province, Vietnam (11.72343°N, 109.13656°E; altitude 730 m a.s.l.) by N.A. Poyarkov and A.M. Bragin on March 4, 2023; ZMMu re-17683–84 (field ID NAP-13365–66), two adult females, collected from Phuoc Binh N.P., Phuoc Binh Commune, Bac Ai District, Ninh thuan Province, Vietnam (11.99353°N, 108.74379°E; altitude 400 m a.s.l.) by N.A. Poyarkov and A.M. Bragin on February 25, 2023; Dtu 605 (adult female) from a secondary forest near hon Ba Nr, Suoi Cat Commune, Cam lam District, khanh hoa Province, Vietnam (12.134169°N, 109.034452°E; altitude 130 m a.s.l.) collected by t.V. Phan, t.D. Nguyen and t.V. Nguyen on May 15, 2023; Dtu 606 (adult female) from An Chua Area, Diem khanh Distrist, khanh hoa Province, Vietnam (12.327065°N, 109.098045°E; altitude 90 m a.s.l.) collected by t.V. Phan, t.D. Nguyen, and t.V. Nguyen on May 20, 2023; Dtu 650 (adult female) collected by t.V. Phan, t.D. Nguyen, and t.V. Nguyen from hon heo Island, Ninh Da Commune, Ninh hoa District, khanh hoa Province, Vietnam (12.397168°N, 109.294047°E; altitude 45 m a.s.l.) on May 19, 2023. Additional materials (n = 3). ZFMK 94670 (adult male) from Ba to District, Quang Ngai Province, Vietnam (ca. 14.707444°N, 108.997215°E; altitude 140 m a.s.l.). Dtu 653 (adult female, released) from Suoi Mo Area, Bui thi Xuan town, Quy Nhon City, Binh Dinh Province, Vietnam (13.695361°N, 109.170546°E; altitude 280 m a.s.l.) collected by t.V. Phan and t.D. Nguyen on August 03, 2023; Dtu 636 (adult female, released) from hiep ha Commune, Van Canh District, Binh Dinh Province, Vietnam (13.664300°N, 108.972583°E; altitude 250 m a.s.l.) collected by t.V. Phan and t.D. Nguyen on August 10, 2023. |
| Diagnosis | Diagnosis: the new species is assigned to the subgenus Trimeresurus based on the following morphological attributes: a long calyculate hemipenis and a partially fused first supralabial and nasal scales (Malhotra & thorpe 2004 [as Cryptelytrops]; David et al. 2011). the new species, Trimeresurus cyanolabris sp. nov., differs from other members of the subgenus Trimeresurus by the combination of the following morphological characters: small size, maximum known SVl of 638 mm; dorsal scales in 21 (rarely 23)–21–15 rows, moderately keeled except the outermost rows; ventral scales 166–178; subcaudal scales 52–75, all paired; hemipenis forked, calyculate, reaching the 8th subcaudal; eye bright yellow in both sexes; dorsal surfaces deep green lacking cross-bands; postocular streak white in both sexes; ventrolateral stripe, faint, present on the first few dorsal scale rows in males, absent in females; throat, chin, and lower labials blue color. (IDIIATULLINA et al. 2024) Unfortunately we had to temporarily remove additional information as this was scraped by multiple AI companies who sell that data to their customers. These details, e.g. detailed descriptions or comparisons (about 10871 characters) are available for collaborators and contributors. Please contact us for details. |
| Comment | Venomous! Synonymy: after IDIIATULLINA et al. 2024. Distribution: see map in Pawangkhanant et al. 2025: 2 (Fig 1), Idiiatullina et al. 2025: 377 (Fig. 1), Pawangkhanant et al. 2025 (516 (Fig. 1). |
| Etymology | Named after Latin “cyaneus,” derived from a latizined form of the classical greek adjective κυανος (kyanos), meaning “dark blue” or “deep blue,” and of the latin noun “labrum” (-i), the lip. this specific name means “deep blue-lipped,” and refers to the distinctive blue color found on the throat, chin, and infralabials of the new species. |
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