Gonyosoma iadinum POYARKOV, BRAGIN, IDIIATULLINA, TRAN, LE, DAVID & NGUYEN, 2025
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Gonyosoma iadinum
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| Higher Taxa | Colubridae, Colubrinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) |
| Subspecies | |
| Common Names | E: Jade Tree Snake Vietnamese: Thanh xà Trường Sơn Russian: Nephritovyi poloz (Нефритовый полоз). |
| Synonym | Gonyosoma iadinum POYARKOV, BRAGIN, IDIIATULLINA, TRAN, LE, DAVID & NGUYEN 2025 Gonyosoma prasinum — NGUYEN et al. 2009: 316 ( partim) (nec Gonyosoma prasinum BLYTH 1855 Gonyosoma prasinum — DAVID et al. 2023: 273– 274 (partim) Elaphe prasina — STUART 1999: 58 Elaphe prasina — STUART & HEATWOLE 2008: 99, Fig. 4 Rhynchophis prasinus — WALLACH et al. 2014: 655 (partim) Gonyosoma cf. prasinum — DAVID et al. 2022: 191 Gonyosoma cf. prasinum — POYARKOV et al. 2023: 339 (partim) |
| Distribution | Vietnam, Laos Type locality: Chu Yang Sin National Park in Bong Krang Commune, Lak District, Dak Lak Province, Vietnam (12.39328°N, 108.34684°E; altitude 1,200 m asl. |
| Reproduction | |
| Types | Holotype. ZMMU Re-18222 (field number NAP-15953; will be subsequently deposited in the VNMN under collection number VNMN R.2015.15953), adult male, collected by N.A. Poyarkov on 13 April 2012. Paratypes (n = 4, all from Vietnam). ZMMU Re-18223 (field number NAP-15413), adult male, from Ta Dung NP in Dak Plao Commune, Dak Glong District, Dak Nong Province (11.85566°N, 108.02951°E; altitude 1,780 m asl) collected by N.A. Poyarkov and A.M. Bragin on 24 January 2021; ZMMU Re-14426 (field number NAP- 02866), adult female, from Bao Loc Forest Enterprise, in Loc Bao Commune, Bao Lam District, Lam Dong Province (11.83647°N, 107.639889°E; elevation 655 m a.s.l.) collected by N. A. Poyarkov on April 24, 2012; ZMMU Re- 11551, adult female, from Hon Ba NR in Cam Lam District, Khanh Hoa Province (ca. 12.082088°N, 108.955533°E; altitude 1,550 m asl) collected by V.V. Bobrov on April 27, 2003; VRTC DTU.411, subadult male, from Son Dien Commune, Di Linh District, Lam Dong Province (ca. 11.390085°N, 108.042776°E; altitude 920 m asl) collected by H. H. Nguyen in April 2023. Referred material (n = 4, all from Vietnam). VRTC DTU.596, subadult female, from Ba Na-Nui Chua NR in Hoa Vang District, Da Nang City (ca. 15.991583°N, 107.996635°E; altitude 1,200 m asl) collected by T. D. Nguyen in May 2024; DTU 597, adult female, from Kon Plong District, Kon Tum Province (ca. 14.737767°N, 108.282712°E; altitude 1,300 m asl) collected by T. D. Nguyen in July 2021; DTU 649, adult male, from Bach Ma NP in Phu Loc District, Thua Thien-Hue Province (16.195265°N, 107.848148°E; altitude 950 m a.s.l.) collected by T. A. Tran, L. S. Pham, and A. G. B. Vu on 15 June 2024. |
| Diagnosis | Diagnosis: A medium-sized, slender-bodied species of the genus Gonyosoma distinguished by the following combination of diagnostic characteristics: (1) maximum snout-vent length 807 mm; (2) 19 dorsal scale rows at midbody, 7–11 upper dorsal rows feebly keeled; (3) cloacal plate undivided; (4) 198–210 ventral plates all with a strong lateral keel; (5) 92–112 paired subcaudal scales; (6) one loreal scale, one large preocular and two postoculars on each side; (7) 9 supralabials, 4th–6th entering orbit; (8) dorsum and sides bright green, grass green, or bluish green; (9) dorsal scales usually not edged with black in adult specimens, distinctly black-edged in young individuals; (10) interstitial skin with black and white reticulations; (11) colour of the iris varying from yellowish-green to bluish-green in life; (12) ventral surface greenish-white to pale green or pale yellow with white or cream lateral keels; (13) head colouration similar to body colouration, lacking black preocular or postocular streaks; (14) supralabials yellowish-green; (15) hemipenes short, spinous, reaching the 5th–6th subcaudal when everted. (Poyarkov et al. 2025) 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 7797 characters) are available for collaborators and contributors. Please contact us for details. |
| Comment | Distribution: see map in Poyarkov et al. 2025: 357 (Fig. 1). |
| Etymology | Named after the Latinised form of the classical Greek ἰαδίνως (iadinos), meaning “jade”. The specific name is given in reference to the characteristic greenish- yellow colouration of the iris of the new species and the general greenish body colouration resembling polished jade jewels. |
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