湖南通道发现雷山琴蛙

Nidimna leishanensis Found in Tongdao,Hunan

2020年5月23日在湖南省通道县万佛山镇(26°11′47″N,109°56′21″E,海拔924m)采集到4号两栖动物标本,经形态特征比较,与雷山琴蛙(Nidirana leishanensis)相似;基于线粒体16S rRNA构建的琴蛙属(Nidirana)部分物种贝叶斯系统发育树显示,此次采集的琴蛙标本与雷山琴蛙聚为一支,且具有较高的支持率(1.00);基于Kamura双参数模型估算本次采集的琴蛙标本与雷山模式产地标本间的遗传距离为0.8%,远小于琴蛙属物种间的遗传距离(1.4%~6.4%)。综合形态特征和系统发育比较,确定此次采集到的琴蛙标本为无尾目(Anura)蛙科(Ranidae)琴蛙属的雷山琴蛙,系湖南省两栖.动物分布新记录种。

[Objectives]Four species of amphibian were recorded in Wanfoshan Town,Tongdao County,Hunan Province,China at 26°11′47″N,109°56′21″E,altitude 924 m during a filed survey on 23 May,2020.They are recognized as first recorded in Hunan province by morphological and molecular.[Methods]Compared the specimens with other species of the genus Nidirana morphologically by comparing their measurement data and diagnosis feature(Sample information is shown in Table 1).Molecularly,based on 16S rRNA gene constructed Bayesian inference tree to analyze its phylogenetic relationship,the Kamura two-parameter model in MEGA v6.0 was used to calculate the genetic distances between species of the genus Nidirana.[Results]Through this research,we found the specimens were similar with N.leishanensis in morphological,morphometric measurements(Table 2)and feature(Fig.1)conform to diagnosis characters.Based on 16S rRNA gene constructed Bayesian inference tree showed that the four specimens were clustered with the N.leishanensis with a high support(1.00)(Fig.2).The genetic distance between the specimens and N.leishanensis from type locality was 0.8%,much lower than that between Nidirana species range from 1.4%to 6.4%(Table 3).[Conclusion]Based on morphological and molecular compared,the specimens were identified as TV.leishanensis,which is the new record of this species in Hunan Province,China.