贵州榕江发现花坪白环蛇  

Lycodon cathaya Found in Rongjiang,Guizhou,China

作　　者：吴帝豪 左智力[2] 李茂良 贾如菀 高宗元 任金龙 WU Di-Hao;ZUO Zhi-Li;LI Mao-Liang;JIA Ru-Wan;GAO Zong-Yuan;REN Jin-Long(Chengdu Institute of Biology,Chinese Academy of Sciences,Chengdu 610041;Chengdu Research Institute of Wildlife,Chengdu Zoo,Chengdu 610081,China)

机构地区：[1]中国科学院成都生物研究所,成都610041 [2]成都野生动物研究所,成都动物园,成都610081

出　　处：《动物学杂志》2025年第1期93-104,共12页Chinese Journal of Zoology

基　　金：国家自然科学基金项目(No.32300370,32200363);中国科学院战略生物资源能力建设项目(No.KFJ-BRP-017-65)。

摘　　要：2023年7月18日,在贵州省黔东南苗族侗族自治州榕江县乐里镇采集到1号雄性成体白环蛇(Lycodon)。通过形态特征比较与基于白环蛇属部分物种的线粒体Cyt b基因片段的系统发育分析,确认该蛇属于花坪白环蛇(L.cathaya),为贵州省蛇类分布新记录种。该标本的发现扩大了对花坪白环蛇已知分布范围的认知。本文补充了花坪白环蛇形态特征的变异范围记录并增加了对其半阴茎形态描述,同时总结了贵州省白环蛇属的分布与多样性情况,提出了目前的存疑记录。Lycodon cathaya Wang,Qi,Lyu,Zeng&Wang,2020 is a wolf snake species originally described based on specimens from Longsheng County,Guilin City,Guangxi Zhuang Autonomous Region,China.This species has subsequently been reported in Hunan Province,China.Our study aims to confirm the new specimen collected in Guizhou Province,China and to revise the diversity and distribution of Lycodon snakes in Guizhou Province.During our field survey on July 18th,2023,one male adult specimen(CIB 119811)of the genus Lycodon was collected in Leli Town,Rongjiang County,Qiandongnan Miao and Dong Autonomous Prefecture,Guizhou Province,China(108°47′E,26°31′N,884 m a.s.l.)(Figs.1,2,and 5).The genomic DNA of the newly collected specimen was extracted and then amplified using primers for mitochondrial cytochrome b gene(Cyt b).We added sequences from GenBank to infer a Bayesian phylogenetic tree of the genus Lycodon(Appendix 1).The morphological data was measured using the same method from previous studies.We also reviewed literatures on the herpetofauna of Guizhou Province to summarize the diversity and distribution of Lycodon snakes within the region.The new specimen is nested within the clade of L.cathaya with strong support(Bayesian posterior probability,BPP 0.99)(Fig.4).Morphological comparison also suggests the new specimen to be L.cathaya(Figs.1﹣3,Appendix 2).Combining both morphological evidence and molecular phylogenetic tree inferred from mitochondrial Cyt b gene fragments,the new specimen was identified as L.cathaya,which represents a new snake record in Guizhou Province,China.Six Lycodon species are currently known from Guizhou Province with one problematic record,L.fasciatus.In addition,given the existence of the cryptic species formerly classified as L.fasciatus in China,comprehensive research on the taxonomic status of L.fasciatus from Guizhou Province is needed in future investigation.

关 键 词：游蛇科 分子系统学 形态学 白环蛇属 半阴茎 

分 类 号：Q959[生物学—动物学]