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Issue: Vol. 5725 No. 4: 4 Dec. 2025
Type: Article
Published: 2025-12-04
DOI: 10.11646/zootaxa.5725.4.2
Page range: 475-495
Abstract views: 87
PDF downloaded: 6

Hidden biodiversity on the highest mountain in southern Vietnam: the fourth species of Cyrtodactylus Gray, 1927 (Squamata: Gekkonidae) from Tay Ninh Province

Institute of Biology; Vietnam Academy of Science and Technology; 18 Hoang Quoc Viet Road; Hanoi 10072; Vietnam; Institute of Zoology; University of Cologne; Zülpicher Str. 47b; D-50674 Cologne; Germany; AG Zoologischer Garten Köln; Riehler Str. 173; D-50735 Cologne; Germany
Institute of Biology; Vietnam Academy of Science and Technology; 18 Hoang Quoc Viet Road; Hanoi 10072; Vietnam
HUS High School for Gifted Students; 182 Luong The Vinh Road; Thanh Xuan District; Hanoi; Vietnam
Central Institute for Natural Resources and Environmental Studies; Vietnam National University; Hanoi; 19 Le Thanh Tong; Hanoi; Vietnam; Faculty of Environmental Sciences; University of Science; Vietnam National University; Ha Noi; 334 Nguyen Trai Road; Hanoi; Vietnam; Department of Herpetology; American Museum of Natural History; Central Park West at 79th Street; New York; New York 10024
Central Institute for Natural Resources and Environmental Studies; Vietnam National University; Hanoi; 19 Le Thanh Tong; Hanoi; Vietnam
Institute of Biology; Vietnam Academy of Science and Technology; 18 Hoang Quoc Viet Road; Hanoi 10072; Vietnam; Graduate University of Science and Technology; Vietnam Academy of Science and Technology; 18 Hoang Quoc Viet Road; Cau Giay; Hanoi 10072; Vietnam
Institute of Biology; Vietnam Academy of Science and Technology; 18 Hoang Quoc Viet Road; Hanoi 10072; Vietnam; Graduate University of Science and Technology; Vietnam Academy of Science and Technology; 18 Hoang Quoc Viet Road; Cau Giay; Hanoi 10072; Vietnam
Institute of Zoology; University of Cologne; Zülpicher Str. 47b; D-50674 Cologne; Germany; AG Zoologischer Garten Köln; Riehler Str. 173; D-50735 Cologne; Germany
Institute of Zoology; University of Cologne; Zülpicher Str. 47b; D-50674 Cologne; Germany; AG Zoologischer Garten Köln; Riehler Str. 173; D-50735 Cologne; Germany; Central Institute for Natural Resources and Environmental Studies; Vietnam National University; Hanoi; 19 Le Thanh Tong; Hanoi; Vietnam
Reptilia Ba Den Mountain Cyrtodactylus tayninhensis sp. nov. C. irregularis species group morphology phylogenetic relationships

Abstract

We describe a new species of the Cyrtodactylus irregularis complex from Ba Den Mountain, Tay Ninh Province, southern Vietnam based on molecular divergence and morphological differences. Cyrtodactylus tayninhensis sp. nov. is distinguished from the remaining congeners of the C. irregularis group by having the unique combination of: size medium (SVL 73.4–80 mm); dorsal tubercles in 13 or 14 irregular rows; 36–39 ventral scale rows; enlarged femoral scales absent; precloacal pores absent in females, 4–6 in males, in a continuous row; femoral pores absent; postcloacal spurs two or three on each side; lamellae under toe IV 16–18; a U-shaped continuous neckband, dorsal pattern between limb insertions consisting of two or three irregular yellow-brown bands and tail with 8–10 thin light bands (with two bands near vent light brown, others white); the absence of transversely enlarged median subcaudal scales. In terms of phylogenetic analyses, the new species is recovered as a member of the Cyrtodactylus irregularis species group without any clear sister taxon. Genetically, Cyrtodactylus tayninhensis sp. nov. is separated from the remaining taxa of the Cyrtodactylus irregularis group by a minimum of 13.13% and 16.09% based on fragments of the mitochondrial COI and ND2 genes, respectively.

 

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How to Cite

Do, Q.H., Nguyen, H.Q., Nguyen, H.M.V., Le, M.D., Ho, N.A.T., Pham, C.T., Nguyen, T.Q., Ziegler, T. & Ngo, H.T. (2025) Hidden biodiversity on the highest mountain in southern Vietnam: the fourth species of Cyrtodactylus Gray, 1927 (Squamata: Gekkonidae) from Tay Ninh Province. Zootaxa, 5725 (4), 475–495. https://doi.org/10.11646/zootaxa.5725.4.2