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Article
Published: 2021-04-28

A new species of Dixonius (Squamata: Gekkonidae) from Vientiane Capital, Laos

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. Faculty of Forestry, National University of Laos, Dong Dok Campus, Vientiane, Lao PDR.
Faculty of Biology, University of Science, Vietnam National University, Hanoi, 334 Nguyen Trai Road, Hanoi, Vietnam. Central Institute for Natural Resources and Environmental Studies, Vietnam National University, Hanoi, 19 Le Thanh Tong, 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, Hanoi, 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
AG Zoologischer Garten Köln, Riehler Strasse 173, D–50735 Cologne, Germany. Institute of Zoology, University of Cologne, Zülpicher Strasse 47b, D–50674 Cologne, Germany.
Reptilia Dixonius somchanhae sp. nov. morphology molecular phylogeny taxonomy

Abstract

A new species of the gekkonid genus Dixonius is described from Huaysorn-Huaysua village, Nasaithong District, Vientiane Capital, Laos. The new species can be distinguished from all other species by a combination of the following characters: maximum SVL 47.1 mm; 19–21 longitudinal rows of dorsal tubercles at midbody; 23–26 longitudinal rows of ventrals across the abdomen; 7 or 8 supralabials, 6 in mid-orbital position; 5 or 6 infralabials; 5 or 6 precloacal pores in males, femoral pores lacking; precloacal and femoral pores absent in females; a canthal stripe running from rostrum through the eye and terminating at back of head; dorsum brown with irregular dark marks. In phylogenetic analyses, the species is recovered as the sister taxon to D. siamensis, which occurs in Laos, Thailand, and Vietnam. Genetically, the two species are approximately 9.4% divergent from each other based on the complete mitochondrial ND2 gene with six partial or complete adjacent tRNAs. It is the 12th species known in the genus Dixonius and the second Dixonius species described from Laos.

 

References

  1. Bauer, A.M., Sumontha, M., Grossmann, W., Pauwels, O.S.G. & Vogel, G. (2004) A new species of Dixonius (Squamata: Gekkonidae) from Kanchanaburi Province, western Thailand. Current Herpetology, 23 (1), 17–26.

    https://doi.org/10.5358/hsj.23.17

    Botov, A., Phung, T.M., Nguyen, T.Q., Bauer, A.M., Brennan, I.G. & Ziegler, T. (2015) A new species of Dixonius (Squamata: Gekkonidae) from Phu Quy Island, Vietnam. Zootaxa, 4040 (1), 48–58.

    https://doi.org/10.11646/zootaxa.4040.1.4

    Boulenger, G.A. (1898) Third report on additions to the lizard collection in the Natural History Museum. Proceedings of the Zoological Society London, 1898, 912–923.

    https://doi.org/10.1111/j.1096-3642.1898.tb03194.x

    Das, I. (2004) A new species of Dixonius (Sauria: Gekkonidae) from southern Vietnam. The Raffles Bulletin of Zoology, 52, 145–150.

    Hillis, D.M. & Bull, J.J. (1993) An empirical test of bootstrapping as a method for assessing confidence in phylogenetic analysis. Systematic Biology, 42, 182–192.

    https://doi.org/10.1093/sysbio/42.2.182

    Le, M., Raxworthy, C.J., McCord, W.P. & Mertz, L. (2006) A molecular phylogeny of tortoises (Testudines: Testudinidae) based on mitochondrial and nuclear genes. Molecular Phylogenetics and Evolution, 40, 517–531.

    https://doi.org/10.1016/j.ympev.2006.03.003

    Macey, J.R., Larson, A., Ananjeva, N.B., Fang, Z. & Papenfuss, T.J. (1997) Two novel gene orders and the role of light-strand replication in rearrangement of the vertebrate mitochondrial genome. Molecular Biology and Evolution, 14, 91–104.

    https://doi.org/10.1093/oxfordjournals.molbev.a025706

    Ngo, V.T. & Ziegler, T. (2009) A new species of Dixonius from Nui Chua National Park, Ninh Thuan Province, southern Vietnam (Squamata, Gekkonidae). Zoosystematics and Evolution, 85 (1), 117–125.

    https://doi.org/10.1002/zoos.200800018

    Nguyen, L.T., Schmidt, H.A., von Haeseler, A. & Bui, M.Q. (2015) IQ-TREE: A fast and effective stochastic algorithm for estimating maximum likelihood phylogenies. Molecular Biology and Evolution, 32, 268−274.

    https://doi.org/10.1093/molbev/msu300

    Nguyen, T.H., Sitthivong. S., Ngo, H.T., Luu, V.Q., Nguyen, T.Q., Le, M.D. & Ziegler, T. (2020) A new species of Dixonius (Squamata: Gekkonidae) from the karst forest of Khammouane Province, central Laos. Zootaxa, 4759 (4), 530–542.

    https://doi.org/10.11646/zootaxa.4759.4.4

    Pauwels, O.S.G., Chomngam, N., Larsen, H. & Sumontha, M. (2020) A new limestone-dwelling leaf-toed gecko (Gekkonidae: Dixonius) from coastal hills in Cha-am, peninsular Thailand. Zootaxa, 4845 (1), 097–108.

    https://doi.org/10.11646/zootaxa.4845.1.7

    Posada, D. (2008) jModelTest: Phylogenetic Model Averaging. Molecular Biology and Evolution, 25 (7), 1253–1256.

    https://doi.org/10.1093/molbev/msn083

    Pyron, R.A., Burbrink, F.T. & Wiens, J.J. (2013) A phylogeny and revised classification of Squamata, including 4161 species of lizards and snakes. BMC Evolutionary Biology, 13, 93.

    https://doi.org/10.1186/1471-2148-13-93

    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, 539–542.

    https://doi.org/10.1093/sysbio/sys029

    Simmons, J.E. (2002) Herpetological collecting and collections management. Revised edition. Society for the Study of Amphibians and Reptiles. Herpetological Circular, 31, 1–153.

    Sumontha, M., Chomngam, N., Phanamphon, E., Pawangkhanant, P., Viriyapanon, C., Thanaprayotsak, W. & Pauwels, O.S.G. (2017) A new limestone-dwelling leaf-toed gecko (Gekkonidae: Dixonius) from Khao Sam Roi Yot massif, peninsular Thailand. Zootaxa, 4247 (5), 556–568.

    https://doi.org/10.11646/zootaxa.4247.5.2

    Sumontha, M. & Pauwels, O.S.G. (2020) A new leaf-toed gecko (Gekkonidae: Dixonius) from the city of Ranong, southwestern Thailand. Zootaxa, 4845 (2), 166-176.

    https://doi.org/10.11646/zootaxa.4852.2.2

    Swofford, D.L. (2001) PAUP*. Phylogenetic Analysis Using Parsimony (*and Other Methods). Version 4. Sinauer Associates, Sunderland, Massachusetts. [program]

    Taylor, E.H. (1962) New Oriental reptiles. University of Kansas Science Bulletin, 43, 209–263.

    https://doi.org/10.5962/bhl.part.13346

    Thompson, J.D., Gibson, T.J., Plewniak, F., Jeanmougin, F. & Higgins, D.G. (1997) The ClustalX windows interface: Flexible strategies for multiple sequence alignment aided by quality analysis tools. Nucleic Acids Research, 25, 4876–4882.

    https://doi.org/10.1093/nar/25.24.4876.

    Ziegler, T., Botov, A., Nguyen, T.T., Bauer, A.M., Brennan, I.G., Ngo, H.T. & Nguyen, Q.T. (2016) First molecular verification of Dixonius vietnamensis Das, 2004 (Squamata: Gekkonidae) with the description of a new species from Vinh Cuu Nature Reserve, Dong Nai Province, Vietnam. Zootaxa, 4136 (3), 553–566.

    https://doi.org/10.11646/zootaxa.4136.3.7