摘要
大别山脊蛇(Achalinus dabieshanensis)是依据采自安徽大别山区的3号标本描述的脊蛇属新物种,目前仅在安徽岳西县和霍山县有分布记录。2024年7月,在江西省九江市武宁县九宫山采集到1号雌性亚成体脊蛇属标本(采集号LFR2024132)。该标本鼻间鳞沟略短于前额鳞沟;上唇鳞6枚,3+2+1式;下唇鳞5枚,其中第1~3枚接第一对颔片;颔片两对;背鳞23-23-23行,除最外行背鳞光滑无棱外,其余均具棱;腹鳞159枚,尾下鳞44枚;尾长与体全长之比为0.16;基于线粒体COI基因片段的分子系统发育分析显示,该样本与大别山脊蛇模式标本聚为一支,其与模式标本间遗传距离为0.9%~1.3%,小于脊蛇属物种间遗传距离2.8%~18.8%。综合形态比较和系统发育分析结果,确定江西九江采集的脊蛇属标本为大别山脊蛇,系江西蛇类分布新记录种。
The odd-scaled snake genus Achalinus,widely distributed in northern Vietnam,China,and Japan,is a group of snakes with relatively deficient data.A.dabieshanensis Zhang,Liu,Huang and Zhang,2023 was first described based on three specimens and is currently known to be found only in Anhui Province,China.During our recent herpetological surveys,an Achalinus specimen(collection number LFR2024132)was collected from Wuning County,Jiangxi Province,China(29°23′21″N,114°39′45″E,1470 m a.s.l.).Morphological characteristics of this specimen were examined and measured in calibrated scale(Deli,0﹣300 mm,accurate to 1 mm)and Stainless steel digital calipers(German Minat,0﹣150 mm,accurate to 0.01 mm)to primarily identify this specimen,then maximum likelihood tree was constructed using DNAStar,MEGA X,IQ-TREE 1.6.12,and uncorrected p-distance was calculated using MEGA X,based on mitochondrial COI genes,to confirm the species delimitation.The specimen was a subadult female with the following morphological characteristics:(1)dorsal scales strongly keeled,23 rows throughout the body,the outmost row smooth and significantly enlarged;(2)tail relatively short,the ratio of tail length to total length 0.16;(3)length of suture between internasals shorter than that between prefrontals;(4)supralabials 6,the 4th and 5th in contact with the eye;(5)infralabials 5,first three in contact with anterior chin shields;(6)ventrals 159,subcaudals 44,not paired.Molecular data revealed that the specimen from Wuning County clustered with the type series of A.dabieshanensis,with low intraspecific genetic divergence(0.9%﹣1.3%,Appendix 1).The result of morphological and phylogenetic relationships indicates that A.dabieshanensis represents a new snake record for Jiangxi Province(Figs.1﹣4,Tables 1﹣3,Appendix 1).This study indicates that A.dabieshanensis represents a new snake record for Jiangxi Province,bringing the total number of Achalinus species recorded in this province to four,and further enriching the reptile diversity of Jiangxi Province.It is recommended that the investigation and research of this species be continuously strengthened,especially in the adjacent areas of known distribution,such as southeastern Hubei Province and northeastern Hunan Province.
作者
刘丹
徐宇浩
张天佑
常金康
王一凡
彭丽芳
LIU Dan;XU Yu-Hao;ZHANG Tian-You;CHANG Jin-Kang;WANG Yi-Fan;PENG Li-Fang(State Key Laboratory of Plateau Ecology and Agriculture,Qinghai University,Xining 810016;School of Plant Protection,Anhui Agricultural University,Hefei 230036;College of Life Sciences,Shanghai Normal University,Shanghai 200234;School of Mathematical Sciences,Xiamen University,Xiamen 361000,China)
出处
《动物学杂志》
北大核心
2025年第3期451-462,共12页
Chinese Journal of Zoology
基金
青海省自然科学基金青年项目(No.2024-ZJ-965)。
关键词
大别山脊蛇
系统发育
形态比较
新记录种
Achalinus dabieshanensis
Phylogeny
Morphological comparison
New record
