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Issue: Vol. 5689 No. 2: 3 Sept. 2025
Type: Article
Published: 2025-09-03
DOI: 10.11646/zootaxa.5689.2.5
Page range: 333-360
Abstract views: 143
PDF downloaded: 8

A new species of the Cyrtodactylus irregularis group (Squamata: Gekkonidae) from Chu Yang Sin National Park, Dak Lak Province, Central Highlands of Vietnam

Faculty of Forest Resources and Environmental Management; Vietnam National University of Forestry; Xuan Mai; Chuong My; Hanoi; Vietnam.
Faculty of Forest Resources and Environmental Management; Vietnam National University of Forestry; Xuan Mai; Chuong My; Hanoi; Vietnam.
Faculty of Forest Resources and Environmental Management; Vietnam National University of Forestry; Xuan Mai; Chuong My; Hanoi; Vietnam.
College of Forestry Biotechnology; Vietnam National University of Forestry; Hanoi; Vietnam.
Chu Yang Sin National Park; DakLak Province.
Herpetology Laboratory; Department of Biology; La Sierra University; 4500 Riverwalk Parkway; Riverside; California 92515 USA; Department of Herpetology; San Diego Natural History Museum; PO Box 121390; San Diego; California; 92112; USA.
Faculty of Forest Resources and Environmental Management; Vietnam National University of Forestry; Xuan Mai; Chuong My; Hanoi; Vietnam.
Reptilia Cyrtodactylus chuyangsinensis sp. nov. molecular phylogenetics integrative taxonomy Southeast Asia

Abstract

A new species is described based on seven specimens of Cyrtodactylus (Family: Gekkonidae) collected from the Chu Yang Sin National Park, Dak Lak Province, Central Highlands, Vietnam. The new species is placed within the Cyrtodactylus irregularis group and can be distinguished from its closest related species and other congeners of the group by the following combination of morphological characters: a maximum SVL 92.3 mm; supralabials 10–12; infralabials 8–10; dorsal tubercle rows at midbody 12–15; ventral scale rows 38–48; subdigital lamellae on the fourth toe 16–21; enlarged femoral scales from each thigh 6–9; enlarged precloacal scales 19–24; precloacal pores in males seven or eight and females 0–6; enlarged subcaudals lacking; small, irregularly shaped dark-brown blotches on top of head; a slender, dark-colored V shaped nuchal loop with a concave anterior border and convex posterior border extending across the nape to the posterior margins of the orbits; dorsal body banding divided into paravertebral elements; dark-colored dorsal body bands narrower than pale dorsal interspaces and irregularly shaped. Phylogenetic analyses indicate that the new species is closely related to C. phnomchiensis and C. ziegleri, with a minimum genetic distance of 7.0% from these species.

 

References

  1. Chan, K.O. & Grismer, L.L. (2022) GroupStruct: An R package for allometric size correction. Zootaxa, 5124 (4), 471–482. https://doi.org/10.11646/zootaxa.5124.4.4
  2. David, P., Teynié, A. & Ohler, A. (2004) A new species of Cyrtodactylus Gray, 1827 (Reptilia: Squamata: Gekkonidae) from southern Laos. Raffles Bulletin of Zoology, 52, 621–627.
  3. Do, Q.H., Phung, T.M., Ngo, H.T., Le, M.D., Ziegler, T., Pham, C.T. & Nguyen, T. (2021) A new species of Cyrtodactylus (Squamata: Gekkonidae) from Ninh Thuan Province, southern Vietnam. Zootaxa, 4999 (1), 58–76. https://doi.org/10.11646/zootaxa.4999.1.4
  4. Geissler, P., Nazarov, R.A., Orlov, N.L., Phung, T.M., Nguyen, T.Q. & Ziegler, T. (2009) A new species of the Cyrtodactylus irregularis complex (Squamata, Gekkonidae) from southern Vietnam. Zootaxa, 2161 (1), 20–32. https://doi.org/10.11646/zootaxa.2161.1.2
  5. Grismer, L.L., Wood,Jr. P.L., Poyarkov, N.A., Le, M.D., Kraus, F., Agarwal, I., Oliver, P.M., Nguyen, S.N., Nguyen, T.Q., Karunarathna, S., Welton, L.J., Stuart, B.L., Luu, V.Q., Bauer, A.M., O’Connell, K.A., Quah, E.S.H., Chan, K.O., Ziegler, T., Ngo, H., Nazarov, R.A., Aowphol, A., Chomdej, S., Suwannapoom, C., Siler, C.D., Anuar, S. & Grismer, J.L. (2021) Phylogenetic partitioning of the third-largest vertebrate genus in the world, Cyrtodactylus Gray, 1827 (Reptilia; Squamata; Gekkonidae) and its relevance to taxonomy and conservation. Vertebrate Zoology, 71, 101–154. https://doi.org/10.3897/vz.71.e59307
  6. Heidrich, A., Rösler, H., Vu, N.T., Böhme, W. & Ziegler, T. (2007) Another new Cyrtodactylus (Squamata: Gekkonidae) from Phong Nha-Ke Bang National Park, central Truong Son, Vietnam. Zootaxa, 1445, 35–48. https://doi.org/10.11646/zootaxa.1445.1.3
  7. Huelsenbeck, J.P., Ronquist, F., Nielsen, R. & Bollback, J.P. (2001) Bayesian inference of phylogeny and its impact on evolutionary biology. Science, 294 (5550), 2310–2314. https://doi.org/10.1126/science.1065889
  8. Husson, F., Josse, J., Le, S. & Mazet, J. (2017) FactoMineR: Exploratory Data Analysis and Data Mining. R package version 1.36.
  9. Jombart, T., Devillard, S. & Balloux, F. (2010) Discriminant analysis of principal components: A new method for the analysis of genetically structured populations. BMC Genetics, 11 (1), 1–15. https://doi.org/10.1186/1471-2156-11-94
  10. Kalyaanamoorthy, S., Minh, B.Q., Wong, T.K., von, Haeseler A. & Jermiin, L.S. (2017) ModelFinder: Fast model selection for accurate phylogenetic estimates. Nature Methods, 14 (6), 587–589. https://doi.org/10.1038/nmeth.4285
  11. Kassambara, A. & Mundt, F. (2017) factoextra: Extract and Visualize the Result of Multivariate Data Analyses. R Package Version 1.0.5.999. [program]
  12. Kumar, S., Stecher, G. & Tamura, K. (2016) MEGA7: Molecular evolutionary genetics analysis version 7.0 for bigger datasets. Molecular Biology and Evolution, 33 (7), 1870–1874. https://doi.org/10.1093/molbev/msw054
  13. Lleonart, J., Salat, J. & Torres, G.J. (2000) Removing allometric effects of body size in morphological analysis. Journal of Theoretical Biology, 205 (1), 85–93. https://doi.org/10.1006/jtbi.2000.2043
  14. Luu, V.Q., Bonkoski, M., Nguyen, T.Q., Le, M.D., Schneider, N., Ngo, H.T. & Ziegler, T. (2016) Evolution in karst massifs: cryptic diversity among bent-toed geckos along the Truong Son Range with descriptions of three new species and one new country record from Laos. Zootaxa, 4107 (2), 101–140. https://doi.org/10.11646/zootaxa.4107.2.1
  15. Luu, V.Q., Dung, T.V., Nguyen, T.Q., Le, M.D. & Ziegler, T. (2017) A new species of the Cyrtodactylus irregularis complex (Squamata: Gekkonidae) from Gia Lai Province, Central Highlands of Vietnam. Zootaxa, 4362 (3), 385–404. https://doi.org/10.11646/zootaxa.4362.3.4
  16. Luu, V.Q., Nguyen, T.H., Le, M.D., Grismer, J.L., Ha, H.B., Sitthivong, S., Hoang, T.T. & Grismer, L.L. (2023) Two new species of Dixonius from Vietnam and Laos with a discussion of the taxonomy of Dixonius (Squamata, Gekkonidae). ZooKeys, 1163, 143–176. https://doi.org/10.3897/zookeys.1163.101230
  17. Luu, V.Q., Calame, T., Nguyen, T.Q., Bonkowski, M. & Ziegler, T. (2015) A new species of Cyrtodactylus (Squamata: Gekkonidae) from the limestone forest of Khammouane Province, central Laos. Zootaxa, 4058 (3), 388–402. https://doi.org/10.11646/zootaxa.4058.3.6
  18. McCoy, M.W., Bolker, B.M., Osenberg, C.W., Miner, B.G. & Vonesh, J.R. (2006) Size correction: Comparing morphological traits among populations and environments. Oecologia, 148 (4), 547–554. https://doi.org/10.1007/s00442-006-0403-6
  19. Miller, M.A., Pfeiffer, W. & Schwartz, T. (2010) Creating the CIPRES Science Gateway for inference of large phylogenetic trees. Proceedings of the Gateway Computing Environments Workshop (GCE), New Orleans, Louisiana, 14 November 2010, 1–8. https://doi.org/10.1109/GCE.2010.5676129
  20. Minh, Q., Nguyen, M.A.T. & von, Haeseler, A. (2013) Ultrafast approximation for phylogenetic bootstrap. Molecular Biology and Evolution, 30 (5), 1188–1195. https://doi.org/10.1093/molbev/mst024
  21. Nazarov, R.A., Orlov, N.L., Nguyen, N.S. & Ho, T.C. (2008) Taxonomy of naked-toe geckos Cyrtodactylus irregularis complex of South Vietnam and description of a new species from Chu Yang Sin Natural Park (Krong Bong District, Dac Lac Province), Vietnam. Russian Journal of Herpetology, 15, 141–156.
  22. Nazarov, R., Poyarkov, N.A., Orlov, N.L., Phung, T.M., Nguyen, T.T., Hoang, D.M. & Ziegler, T. (2012) Two new cryptic species of the Cyrtodactylus irregularis complex (Squamata: Gekkonidae) from southern Vietnam. Zootaxa, 3302 (1), 1–24. https://doi.org/10.11646/zootaxa.3302.1.1
  23. Neang, T., Henson, A. & Stuart, B.L. (2020) A new species of Cyrtodactylus (Squamata, Gekkonidae) from Cambodia’s Prey Lang Wildlife Sanctuary. ZooKeys, 926, 133–158. https://doi.org/10.3897/zookeys.926.48671
  24. Ngo H.T., Hormann, H., Le, M.D., Pham, C.T., Phung, T.M., Do, D.T., Ostrowski, S., Nguyen, T.Q. & Ziegler, T. (2023) The discovery of two new speciws in the Cyrtodactylus irregularis group highlights that hidden diversity remains in the largest clade of the mega-diverse genus Cyrtodactylus. European Journal of Taxonomy, 875, 70–100. https://doi.org/10.5852/ejt.2023.875.2141
  25. Ngo, T.V. (2013) Cyrtodactylus dati, a new forest dwelling Bent-toed Gecko (Squamata: Gekkonidae) from southern Vietnam. Zootaxa, 3616 (2), 151–164. https://doi.org/10.11646/zootaxa.3616.2.4
  26. Ngo, T.V. & Bauer, A.M. (2008) Descriptions of two new species of Cyrtodactylus Gray, 1827 (Squamata: Gekkonidae) endemic to southern Vietnam. Zootaxa, 1715 (1), 27–42. https://doi.org/10.11646/zootaxa.1715.1.2
  27. Ngo, T.V. & Chan, K.O. (2010) A new species of Cyrtodactylus Gray, 1826 (Squamata: Gekkonidae) from Khanh Hoa province, southern Vietnam. Zootaxa, 2504 (1), 47–60. https://doi.org/10.11646/zootaxa.2504.1.4
  28. Ngo, T.V., Grismer, L.L., Pham, T.H. & Wood, P.L.JR. (2020) A new endemic insular Bent-toed Gecko (Squamata: Gekkonidae: Cyrtodactylus) from Quang Nam Province, Central Vietnam. Zootaxa, 4766 (2), 389–400. https://doi.org/10.11646/zootaxa.4766.2.7
  29. Nguyen, A.T., Duong, T.V., Grismer, L.L. & Poyarkov, N.A. (2021) A new granite cave-dwelling Bent-toed Gecko from Vietnam of the Cyrtodactylus irregularis group (Squamata: Gekkonidae) and a discussion on cave ecomorphology. Vertebrate Zoology, 71, 155–174. https://doi.org/10.3897/vz.71.e60225
  30. Nguyen, L.T., Schmidt, H.A., von Haeseler, A. & Minh, B.Q. (2015) IQ-TREE: A fast and effective stochastic algorithm for estimating maximum likelihood phylogenies. Molecular Biology and Evolution, 32 (1), 268–274. https://doi.org/10.1093/molbev/msu300
  31. Nguyen, S.N., Orlov, N.L. & Darevsky, I.S. (2006) Descriptions of two new species of the genus Cyrtodactylus Gray, 1827 (Squamata: Sauria: Gekkonidae) from southern Vietnam. Russian Journal of Herpetology, 13 (3), 215–226. https://doi.org/10.30906/1026-2296-2006-13-3-215-226
  32. Nguyen, S.N., Le, T.T., Tran, T.A.D., Orlov, N.L., Lathrop, A., MacCulloch, R.D., Le, T.D.T., Jun, J-Q., Nguyen, L.T., Nguyen, T.T., Hoang, D.D., Che, J., Murphy, R.Q. & Zhang, Y.P. (2013) Phylogeny of the Cyrtodactylus irregularis species complex (Squamata: Gekkonidae) from Vietnam with the description of two new species. Zootaxa, 3737 (4), 399–414. https://doi.org/10.11646/zootaxa.3737.4.4
  33. Nguyen, T.H., Ha, H.B., Murdoch, M.L., Grismer, J.L., Grismer, L.L. & Luu, V.Q. (2025) Integrative taxonomic approaches revealed a new species of the Cyrtodactylus irregularis complex (Squamata: Gekkonidae) from Gia Lai Province, Central Highlands of Vietnam. Zootaxa, 5679 (1), 45–73. https://doi.org/10.11646/zootaxa.5679.1.2
  34. Orlov, N.L., Nguyen, T.Q., Nazarov, A.R., Ananjeva, B.N. & Nguyen, S.N. (2007) A new species of the genus Cyrtodactylus Gray, 1827 and redescription of Cyrtodactylus paradoxus (Darevsky et Szczerbak, 1997) [Squamata: Sauria: Gekkonidae] from South Vietnam. Russian Journal of Herpetology, 14, 145–152.
  35. Ostrowski, S., Le, M.D., Ngo, H.T., Pham, C.T., Nguyen, T.Q. & Ziegler, T. (2020) A new species of Cyrtodactylus (Squamata: Gekkonidae) from southern Vietnam. Zootaxa, 4789 (1), 171–203. https://doi.org/10.11646/zootaxa.4789.1.5
  36. Ostrowski, S., Le, M.D., Ngo, H.T., Pham, C.T., Phung, T.M., Nguyen, T.Q. & Ziegler, T. (2021) A new Cyrtodactylus (Squamata: Gekkonidae) from Binh Thuan Province, southern Vietnam. European Journal of Taxonomy, 731 (1), 47–70. https://doi.org/10.5852/ejt.2021.731.1023
  37. Pagès, J. (2015) Multiple Factor Analysis by Example Using R. CRC Press, New York, New York, 272 pp. https://doi.org/10.1201/b17700
  38. Pauwels, O.S.G., Nazarov, R.A., Bobrov, V.V. & Poyarkov, N.A. (2018) Taxonomic status of two populations of bent-toed geckos of the Cytrodactylus irregularis complex (Squamata: Gekkonidae) with description of a new species from Nui Chua National Park, southern Vietnam. Zootaxa, 4403 (2), 307–335. https://doi.org/10.11646/zootaxa.4403.2.5
  39. R Core Team (2021) R: A language and environment for statistical computing. R foundation for statistical computing, Vienna. Available from: https://www.R-project.org (accessed 4 August 2025)
  40. Rambaut, A., Suchard, M.A., Xie, D. & Drummond, A.J. (2014) Tracer. Version 1.7. Available from: http://tree.bio.ed.ac.uk/software/tracer/ (accessed 15 January 2023)
  41. Reist, J.D. (1986) An empirical evaluation of coefficients used in residual and allometric adjustment of size covariation. Canadian Journal of Zoology, 64 (6), 1363–1368. https://doi.org/10.1139/z86-203
  42. Ronquist, F., Teslenko, M., Van, der Mark P., Ayres, D.L., Darling, A., Höhna, S., Larget, B., Liu, L., Suchard, M.A. & Huelsenbeck, J.P. (2012) MrBayes 3.2: efficient Bayesian phylogenetic inference and model choice across a large model space. Systematic Biology, 61 (3), 539–542. https://doi.org/10.1093/sysbio/sys029
  43. Rösler, H., Vu, T.N., Nguyen, T.Q., Ngo, V.T. & Ziegler, T. (2008) A new Cyrtodactylus (Squamata: Gekkonidae) from central Vietnam. Hamadryad, 32, 125–140.
  44. Schneider, N., Phung, T.M., Le, M.D., Nguyen, T.Q. & Ziegler, T. (2014) A new Cyrtodactylus (Squamata: Gekkonidae) from Khanh Hoa Province, southern Vietnam. Zootaxa, 3785 (4), 518–532. https://doi.org/10.11646/zootaxa.3785.4.2
  45. Smith, M.A. (1921) New or little-known Reptiles and Batrachians from Southern Annam (Indochina). Proceedings of the Zoological Society of London, 1921, 423–440. https://doi.org/10.1111/j.1096-3642.1921.tb03271.x
  46. Smith, M.A. (1917) Description of new reptiles and a new batrachian from Siam. Journal National History Society Siam, 1917, 221–225.
  47. Thorpe, R.S. (1975) Quantitative handling of characters useful in snake systematics with particular reference to interspecific variation in the Ringed Snake Natrix natrix (L.). Biological Journal of the Linnean Society. Linnean Society of London, 7 (1), 27–43. https://doi.org/10.1111/j.1095-8312.1975.tb00732.x
  48. Thorpe, R.S. (1983) Phylogenetic analysis of range expansion in the grass snake: reticulate evolution: primary and secondary contact zones. In: Felsenstein, J. (Ed.), NATO Advanced Study Institute Series G (Ecological Sciences). Springer‑Verlag, Berlin, Heidelberg and New York, pp. 464–468. https://doi.org/10.1007/978-3-642-69024-2_47
  49. Trifinopoulos, J., Nguyen, L.T., von, Haeseler A. & Minh, B.Q. (2016) W-IQ-TREE: A fast online phylogenetic tool for maximum likelihood analysis. Nucleic Acids Research, 44 (W1), W232–W235. https://doi.org/10.1093/nar/gkw256
  50. Turan, C. (1999) A note on the examination of morphometric differentiation among fish populations: The Truss System. Turkish Journal of Zoology, 23, 259–263.
  51. Uetz, P., Freed, P. & Hosek, J. (2025) The Reptile Database. Available from: http://www.reptile-database.org/ (accessed 8 April 2025)
  52. Wilcox, T.P., Zwickl, D.J., Heath, T.A. & Hillis, D.M. (2002) Phylogenetic relationships of the Dwarf Boas and a comparison of Bayesian and bootstrap measures of phylogenetic support. Molecular Phylogenetics and Evolution, 25 (2), 361–371. https://doi.org/10.1016/S1055-7903(02)00244-0
  53. Ziegler, T., Phung, T.M., Le, M.D. & Nguyen, T.Q. (2013) A new Cyrtodactylus (Squamata: Gekkonidae) from Phu Yen Province, southern Vietnam. Zootaxa, 3686 (4), 432–446. https://doi.org/10.11646/zootaxa.3686.4.2

How to Cite

Nguyen, T.H., Nguyen, V.Q.H., Nguyen, T.T., Ha, H.B., Le, S.V., Grismer, L.L. & Luu, V.Q. (2025) A new species of the Cyrtodactylus irregularis group (Squamata: Gekkonidae) from Chu Yang Sin National Park, Dak Lak Province, Central Highlands of Vietnam. Zootaxa, 5689 (2), 333–360. https://doi.org/10.11646/zootaxa.5689.2.5