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      Molecular phylogeny and morphological comparisons of the genus Hebius Thompson, 1913 (Reptilia: Squamata: Colubridae) uncover a new taxon from Yunnan Province, China, and support revalidation of Hebius septemlineatus (Schmidt, 1925)

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          Abstract

          We describe a new species of the genus Hebius and provide evidence for the validity of H. septemlineatus comb. nov.. Morphological and molecular analyses of Hebius specimens collected in Yunnan Province, China, revealed three distinct lineages, namely the newly described Hebius weixiensis sp. nov., as well as H. octolineatus (Boulenger, 1904), and H. septemlineatus comb. nov. (Schmidt 1925), which is removed from synonymy with H. octolineatus. Based on mitochondrial genealogy, Hebius weixiensis sp. nov. is sister to H. septemlineatus comb. nov., while H. octolineatus is sister to H. bitaeniatus. The new species and H. septemlineatus comb. nov. showed considerable genetic divergence from their recognized congeners (uncorrected P-distance ≥3.9%). Furthermore, the new species and H. septemlineatus comb. nov. can be diagnosed from closely related congeners by a combination of pholidosis characters.

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          XIV.— Descriptions of new frogs and snakes from Yunnan

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            A taxonomic revision of the Asian keelback snakes, genus Amphiesma (Serpentes: Colubridae: Natricinae), with description of a new species.

            The Asian keelback snakes (genus Amphiesma) are a widely distributed group of Old World natricines, inhabiting a variety of niches and exhibiting significant morphological variation. Recent molecular phylogenies suggest that this genus is not monophyletic, and that additional cryptic diversity is also likely present. We conducted a phylogenetic analysis of the group based on 3162 bp of one mitochondrial gene (Cyt. b) and three nuclear genes (C-mos, Rag1, NT3), sampling 18 species in addition to those sequenced in previous works. All analyses consistently show that Amphiesma consists of three distinct, monophyletic lineages with strong support. We divide Amphiesma into three genera, Amphiesma, Hebius, and Herpetoreas. The genus Amphiesma is monotypic, Herpetoreas contains three species, and Hebius comprises the remaining 39 species. On the basis of a combination of molecular analyses and external morphological comparisons, we describe a new species in the Herpetoreas group from China as H. burbrinki sp. nov. Several other species are shown to be non-monophyletic or contain significant levels of intraspecific genetic diversity. Another Old World natricine genera, Xenochrophis is also found to be non-monophyletic. Our results indicate that further taxonomic revisions are needed in Natricinae, at multiple levels. 
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              <p><strong>A multilocus molecular perspective on the systematics of the poorly known </strong><strong>Northeast Indian colubrid snakes <em>Blythia</em> <em>reticulata</em> (Blyth, 1854), B. hmuifang </strong><strong>Vogel, Lalremsanga &amp; Vanlalhrima, 2017, and <em>Hebius xenura</em> (Wall, 1907)</strong></p>

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                Author and article information

                Contributors
                Journal
                Zool Res
                Zool Res
                ZR
                Zoological Research
                Science Press (16 Donghuangchenggen Beijie, Beijing 100717, China )
                2095-8137
                18 September 2021
                : 42
                : 5
                : 620-625
                Affiliations
                [1 ] State Key Laboratory of Genetic Resources and Evolution State, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
                [2 ] Kunming College of Life Science, University of the Chinese Academy of Sciences, Kunming, Yunnan 650204, China
                [3 ] Key Laboratory for Conserving Wildlife with Small Populations in Yunnan, Southwest Forestry University, Kunming, Yunnan 650224, China
                [4 ] Chinese Research Academy of Environmental Sciences, Beijing 100012, China
                [5 ] Faculty of Agriculture, Forest and Food Engineering, Yibin University, Yibin, Sichuan 644007, China
                Author notes
                Article
                zr-42-5-620
                10.24272/j.issn.2095-8137.2021.093
                8455471
                34410048
                ae085570-2225-452a-a4bd-c733f39e4119
                Editorial Office of Zoological Research, Kunming Institute of Zoology, Chinese Academy of Sciences

                This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( http://creativecommons.org/licenses/by-nc/4.0/), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

                Funding
                This work was supported by the Second Tibetan Plateau Scientific Expedition and Research (STEP) Program (2019QZKK0501), Biodiversity Survey and Assessment Project of the Ministry of Ecology and Environment, China (2019HJ2096001006), Strategic Priority Research Program of the Chinese Academy of Sciences (CAS) (XDA20050201), Digitalization, Development and Application of Biotic Resource (202002AA100007), Sciences and Technology Department of Sichuan Province (2020YFSY0033) and State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, CAS (GREKF 19-02), and Animal Branch of the Germplasm Bank of Wild Species, CAS (Large Research Infrastructure Funding)
                Categories
                Letter to the Editor

                cryptic diversity,yunnan,molecular phylogeny,morphology,serpentes

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