Abstract

The Painted Wolf Snake, Lycodon pictus, was recently described based on the type series from Trung Khanh and Ha Lang districts in Cao Bang Province, northern Vietnam. Herein, we report new findings and a range extension of the recently described species. One individual was collected close by the type locality, in Ha Lang District, Cao Bang Province, Vietnam and another one in Nonggang National Nature Reserve, Longzhou County, Guangxi Zhuang Autonomous Region, China, approximately 60 km apart from the type locality. Both specimens generally accorded with the morphological diagnosis of L. pictus provided in the original description. Molecular analyses supported the morphological findings: the newly collected specimens were approximately 0.3-0.9% (cyt b) genetically divergent from those of the type series. Molecular analyses also revealed that the holotype of L. pictus, for which no sequences were available so far, showed, based on the results of a formalin protocol, about 0.9-1.3% differentiation from the remaining type series, 0.5% from the new record from Cao Bang and 0.9% from the new record from China. Based on the morphological and molecular findings, we herein present the first country record of L. pictus from China, with a detailed morphological description of the specimen from Nonggang National Nature Reserve and slightly extend the original diagnosis of the species.

Highlights

  • The genus Lycodon Boie, 1827 is one of the most diverse genera of colubrid snakes, with 64 currently recognized species (Uetz et al, 2020; Wang et al, 2020b)

  • Sampling: Field surveys in Vietnam were conducted in Duc Quang Commune, Ha Lang District, Cao Bang Province (22.42’.48’’N; 106.39’.55’’ E, 510 m a.s.l.) on 16 May 2019 by Tao Thien Nguyen, and in China in Nonggang National Nature Reserve, Longzhou County, Guangxi Zhuang Autonomous Region (106°57’18.77” E, 22°28’3.92” N, 233 m a.s.l.) on 8 July 2019 by JinLong Ren and Fan-Xing Zeng

  • The specimens are deposited in the collections of the Vietnam National Museum of Nature, Vietnam Academy of Science and Technology (VNMN), Hanoi, Vietnam and of Herpetological Museum, Chengdu Institute of Biology, Chinese Academy of Sciences (CIB), Chengdu, China

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Summary

Introduction

The genus Lycodon Boie, 1827 is one of the most diverse genera of colubrid snakes, with 64 currently recognized species (Uetz et al, 2020; Wang et al, 2020b). From Vietnam, sixteen species of Lycodon have been reported to date, comprising L. capucinus (Boie, 1827), L. cardamomensis (Daltry & Wüster, 2002), L. davisonii (Blanford, 1878), L. fasciatus (Anderson, 1879), L. flavozonatus (Pope, 1928), L. futsingensis (Pope, 1928), L. laoensis Günther, 1864, L. meridionalis (Bourret, 1935), L. namdongensis Luu, Ziegler, Ha, Le & Hoang, 2019, L. paucifasciatus Rendahl in Smith, 1943, L. pictus Janssen, Pham, Ngo, Le, Nguyen & Ziegler, 2019, L. rosozonatus (Hu & Zhao, 1972 [1975]), L. rufozonatus Cantor, 1842, L. ruhstrati abditus Vogel, David, Pauwels, Sumontha, Norval, Hendrix, Vu & Ziegler, 2009, L. septentrionalis (Günther, 1875) and L. subcinctus Boie, 1827 (Uetz et al, 2020). We report new findings of the species, supported by morphological and molecular analyses, resulting in an extended diagnosis and range extension of L. pictus

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