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Type: Article
Published: 2019-06-26
Page range: 535–544
Abstract views: 77
PDF downloaded: 3

A new member of the genus Sinonatrix (Serpentes: Colubridae) from western China

College of Life Sciences and Food Engineering, Yibin University, Yibin 644007, China
College of Life Sciences, Guizhou Normal University, Guiyang 550025, China
College of Life Sciences and Food Engineering, Yibin University, Yibin 644007, China
Reptilia Sinonatrix yapingi sp. nov. Natricinae morphology taxonomy


A new member of the natricine snake genus Sinonatrix Rossman & Eberle, 1977 is described from Yunnan Province, southwestern China, based on a single female specimen. The new species, Sinonatrix yapingi sp. nov., is distinguished from its congeners and related species by the following combination of characters: 1) large body size (maximum total length more than 795 mm); 2) dorsal scales in 19-19-17 rows, moderately keeled except outer four; 3) prefrontal single; 4) ventral scales 149, subcaudals 55, paired; 5) cloaca divided; 6) body bands 30; 7) belly milk-white, without speckles or bands; 8) reduction of dorsal scale rows from 19 to 17 anterior to 90th ventral scale; 9) reduction of caudodorsal scale rows from 8 to 6 anterior to 12th subcaudal and from 6 to 4 anterior to 38th subcaudal; 10) postorbital bones not in contact with frontals, with weak parietal ridge; end of supratemporal bones extending beyond braincase; maxillary teeth 25, last two not enlarged; and, dentary teeth 26. In addition, the genetic distances between the new species and other representatives of Sinonatrix ranged from 14.6% to 15.0%.



  1. Burbrink, F.T., Lawson, R. & Slowinski, J.B. (2000) Mitochondrial DNA phylogeography of the polytypic North American rat snake (Elaphe obsoleta): A critique of the subspecies concept. Evolution, 54, 2107–2118.

    Chen, J.M., Poyarkov, Jr. N.A., Suwannapoom, C., Lathrop, A., Wu, Y.H., Zhou, W.W., Yuan, Z.Y., Jin, J.Q., Chen, H.M., Liu, H.Q., Nguyen, T.Q., Nguyen, S.N., Duong, T.V., Eto, K., Nishikawa, K., Matsui, M., Orlov, N.L., Stuart, B.L., Brown, R.M., Rowley, J.J.L., Murphy, R.W., Wang, Y.Y. & Che, J. (2018) Large-scale phylogenetic analyses provide insights into unrecognized diversity and historical biogeography of Asian leaf-litter frogs, genus Leptolalax (Anura: Megophryidae). Molecular Phylogenetics and Evolution, 124, 162–171.

    Chen, J.M., Zhou, W.W., Poyarkov, Jr. N.A., Stuart, L.B., Brown, M.R., Lathrop, A., Wang, Y.Y., Yuan, Z.Y., Jiang, K., Hou, M., Chen, H.M., Suwannapoom, C., Nguyen, N.S., Duong, V.T., Papenfuss, J.T., Murphy, W.R., Zhang, Y.P. & Che, J. (2017) A novel multilocus phylogenetic estimation reveals unrecognized diversity in Asian horned toads, genus Megophrys sensu lato (Anura: Megophryidae). Molecular Phylogenetics and Evolution, 106, 28–43.

    Dowling, H.G. (1951) A proposed system for counting ventrals in snakes. British Journal of Herpetology, 1, 97–99.

    Guo, P., Liu, Q., Xu, Y., Jiang, K., Hou, M., Ding, L. Pyron, R.A. & Burbrink, F.T. (2012) Out of Asia: Natricine snakes support the Cenozoic Beringian Dispersal Hypothesis. Molecular Phylogenetics and Evolution, 63, 825–833

    Kumar, S., Dudley, J., Nei, M. & Tamura, K. (2008) MEGA: A biologist-centric software for evolutionary analysis of DNA and protein sequences. Briefings in Bioinformatics, 9, 299–306.

    Lanfear, R., Calcott, B., Ho, S.Y.W. & Guindon, S. (2012) PartitionFinder: combined selection of partitioning schemes and substitution models for phylogenetic analyses. Molecular Biology and Evolution, 29, 1695–1701.

    Liu, Q., Myers, E.A., Zhong, G.H., Hu, J., Zhao, H. & Guo, P. (2012) Molecular evidence on the systematic position of the lance-headed pitviper Protobothrops maolanensis Yang et al., 2011. Zootaxa, 3178 (1), 57–62

    Rambaut, A. & Drummond, A.J. (2007) Tracer. Version 1.4. Available from: (accessed 23 March 2018)

    Rao, D.Q., Vindum, J.V., Ma, X.H., Fu, M.X. & Wilkinson, J.A. (2017) A new species of Japalura (Squamata, Agamidae) from the Nu River Valley in Southern Hengduan Mountains, Yunnan, China. Asian Herpetological Research, 8 (2), 86–95.

    Rao, D.Q. & Yang, D.T. (1998) A new species of Sinonatrix (Serpentes: Colubridae) of China with preliminary survey on Sinonatrix. Russian Journal of Herpetology, 5 (1), 70–73.

    Ren, J.L., Wang, K., Jiang, K., Guo, P. & Li, J.T. (2017) A new species of the Southeast Asian genus Opisthotropis (Serpentes: Colubridae: Natricinae) from western Hunan, China. Zoological Research, 38 (5), 251–263

    Ronquist, F., Teslenko, M., Mark, P.V.D., Ayres, D., Darling, A., Hohna, 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.

    Rossman, D.A. & Eberle, W.G. (1977) Partition of the genus Natrix, with preliminary observations on evolutionary trends in natricine snakes. Herpetologica, 33 (1), 34–43.

    Stamatakis, A., Hoover, P. & Rougemont, J. (2008) A rapid bootstrap algorithm for the RAxML web-servers. Systematic Biology, 75, 758–771.

    Tamura, K., Stecher, G., Peterson, D., Filipski, A. & Kumar, S. (2013) MEGA6: molecular evolutionary genetics analysis version 6.0. Molecular Biology and Evolution, 30, 2725–2729.

    Wang, K., Jiang, K., Zhou, D.H., Yan, F., Siler, C.D. & Che, J. (2016) Two new species of Japalura (Squamata: Sauria: Agamidae) from the Hengduan Mountain Range, PR China. Zoological Research, 37 (1), 41–56.

    Wang, Y.Y., Guo, Q., Liu, Z.Y., Lyu, Z.T., Wang, J., Luo, L., Sun, Y.J. & Zhang, Y.W. (2017) Revisions of two poorly known species of Opisthotropis Günther, 1872 (Squamata: Colubridae: Natricinae) with description of a new species from China. Zootaxa, 4247 (4), 391–412.

    Yang, D.T. & Rao, D.Q. (2008) Amphibia and Reptilia of Yunnan. Yunnan Science and Technology Press, Kunming, 411 pp.

    Yang, J.H. & Chan, B.P.L. (2018) A new phytotelm-breeding treefrog of the genus Nasutixalus (Rhacophoridae) from western Yunnan of China. Zootaxa, 4388 (2), 191–206.

    Yang, J.H., Sung, Y.H. & Chan, B.P.L. (2013) A new species of the genus Opisthotropis Günther, 1872 (Squamata: Colubridae: Natricinae) from Guangdong Province, China. Zootaxa, 3646 (3), 289–296.

    Yang, J.H., Wang, J. & Wang, Y.Y. (2018) A new species of the genus Megophrys (Anura: Megophryidae) from Yunnan Province, China. Zootaxa, 4413 (2), 325–338.

    Yu, G., Hui, H., Rao, D. & Yang, J. (2018) A new species of Kurixalus from western Yunnan, China (Anura, Rhacophoridae). Zookeys, 770, 211–226.

    Yuan, Z.Y., Jin, J.Q., Li, J.N., Stuart, B.L. & Wu, J. (2018) A new species of cascade frog (Amphibia: Ranidae) in the Amolops monticola group from China. Zootaxa, 4415 (3), 498–512

    Zhao, E.M. (2006) Snakes of China (I). Anhui Sciences and Technology Publishing House, Hefei, 372 pp.

    Zhao, E.M., Huang, M.H. & Zong Y. (1998) Fauna Sinica: Reptilia. Vol.3. Squamata Serpentes. Science Press, Beijing, 522 pp.

    Zhao, E.M. & Yang, D.T. (1997) Amphibians and Reptiles of the Hengduan Mountains Region. Science Press, Beijing, 303 pp.

    Ziegler, T., David, P., Ziegler, T.N., Pham, C.T., Nguyen, T.Q. & Le, M.D. (2018) Morphological and molecular review of Jacob’s Mountain Stream Keelback Opisthotropis jacobi Angel & Bourret, 1933 (Squamata: Natricidae) with description of a sibling species from northern Vietnam. Zootaxa, 4374 (4), 476–496.