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云南省白链蛇和细白环蛇分布记录

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2022年6和7月,于云南省德宏傣族景颇族自治州盈江县和西双版纳傣族自治州勐腊县境内分别采集到蛇类2条和1条.经分子与形态学鉴定,德宏州2条蛇为白链蛇[Lycodon septentrionalis(Günther,1875)];而西双版纳的1条蛇与国内原鉴定为细白环蛇(L.subcinctus Boie,1827)的标本为同种,但与细白环蛇地模标本的分子遗传距离大,系统关系未解决,由于形态高度相似,暂定为细白环蛇(L.cf.subcinctus).其中,白链蛇的发现恢复了该种在云南省近期才被移除的分布记录,而细白环蛇的发现则佐证了早期文献中长期被忽视的存疑记录.本文讨论了白链蛇在云南的分布历史和细白环蛇的分类问题,并指出未来应加强云南省边境区域的生物多样性调查,以尽快摸清云南省两栖爬行动物本底资料.
Provincial Records of Lycodon septentrionalis and L.cf.subcinctus From Yunnan Province,China
[Objectives]Wolf Snakes of the genus Lycodon represent a major snake radiation in Asia.While recent studies have made major progress on the taxonomy of the genus,distributions of recognized congeners warrant further revisions.The main objective of the current paper is to assess the taxonomic status of the Lycodon populations in western and southern Yunnan Province of China.[Methods]During the fieldwork between June and July in 2022,three specimens of snakes were collected from Yunnan,two of which are from Yingjiang County,and a single specimen is from Mengla County.Mitochondrial DNA fragment(Cyt b)was targeted and amplified using published primers,and the new results were combined with GenBank data to build the phylogeny of the genus and calculate genetic distances.Additionally,morphological data were collected from newly collected specimens and compared with literature.[Results]The two specimens from Yingjiang County were identified as Lycodon septentrionalis(Table 1,Fig.1),which resurrect the removed record of the species from Yunnan.The single specimen from Mengla County was conspecific with the previously identified as"L.subcinctus"Boie,1827 from China,but it showed considerable genetic distances from topotipic L.subcinctus from southeast Asia(Table 2),and the phylogenetic relationship with respect to true L.subcinctus remains unresolved.Due to the lack of morphological diagnosis,the Mengla specimen was tentatively assigned as L.cf.subcinctus,which supported the neglected,questionable record of the species in Yunnan.[Conclusion]Based on our discovery,we discuss the distributional history of L.septentrionalis in Yunnan,indicating that both L.chapaensis and L.septentrionalis are found in Yunnan,with the latter species only found in the very southwestern corner of the province.Moreover,we show that the Chinese population of the previously identified"L.subcinctus"represents a cryptic species that warrant further integrative studies.Lastly,based on the results,we support the previous biogeographic hypothesis that Southwestern Yunnan is similar to southeastern Tibet zoogeographically,and we suggest that future research direction for herpetological surveys in Yunnan should focus more along the border regions in the south.

Neglected recordContinuous distributionCross-border distributionNational border

张浩宇、王立彦、侯绍兵、吴云鹤、段正攀、金银德、左常盛、张永生、王剀、车静

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遗传资源与进化国家重点实验室和云南省高黎贡山生物多样性与生态安全重点实验室,中国科学院昆明动物研究所 昆明 650201

天津农学院水产学院 天津 300384

云南省铜壁关省级自然保护区 芒市 678499

被忽视记录 连续分布 边境 跨国分布

云南省重大科技专项计划项目云南省重点研发计划项目云南省生物资源数字化开发应用项目科技基础资源调查专项国家重点研发计划项目中国科学院中国生物多样性监测与研究网络项目中国西南野生生物种质资源库动物分库项目(国家重大科技基础设施专项)云南省林业和草原局项目遗传资源与进化国家重点实验室开放课题

02102AA310055202103AC100003202002AA1000072021FY1002032022YFC26025002022GF258D-10GREKF18-15

2024

10.13859/j.cjz.202423018

动物学杂志
中国科学院动物研究所，中国动物学会

动物学杂志

CSTPCD北大核心
影响因子：0.522
ISSN：0250-3263
年,卷(期)：2024.59(1)
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