甘肃和青海发现蒙侧褶蛙两栖类新纪录

New Distribution Records of Pelophylax mongolius in Gansu and Qinghai Province

以从甘肃永靖县和青海海东市民和回族土族自治县2次共采集到的侧褶蛙属标本10号为研究对象,通过形态学特征比较发现,10号标本的头长略大于头宽,呈三角形,皮肤光滑,背部有黑斑,中央有一条从头部延伸至肛前缘的浅绿色纵向细线,颌腺明显,鼓膜大呈圆形鼓膜径大于眼径,后肢短而粗壮,趾尖钝圆,趾间全蹼无缺刻。这些特征与采集于内蒙古自治区包头市土默特右旗美岱召镇(模式产地)的蒙侧褶蛙形态鉴定特征基本一致。基于16S rRNA、12S rRNA、COI和Cytb串联基因片段的系统发育分析表明,10号标本与蒙侧褶蛙聚在一支,且串联基因的遗传距离较小(p-distance为1.9%),确定10号标本均为蒙侧褶蛙,是甘肃和青海两栖纲分布新纪录物种。

In this study,a total of 10 specimens were collected on 2 separate occasions from Yongjing County in Gansu Province,and Minhe Hui and Tu Autonomous County in Haidong City,Qinghai Province.Morphological comparison confirms that all specimens exhibit the following characteristics:a triangular head with the head length slightly greater than the head width,smooth skin,black spots on the back,a light green longitudinal line extending from the tip of snout to vent,well-developed jaw glands,round eardrums with diameter larger than eye diameter,short and stout hind limbs,blunt and rounded toe tips,and fully webbed toes without notches.The morphological characteristics of the 10 specimens were similar to those of Pelophylax mongolius(Schmidt,1925)from Tumd Right Banner,Baotou City,Inner Mongolia(type locality of P.mongolius).Phylogenetic analysis based on concatenated gene fragments of 16S rRNA,12S rRNA,COI and Cytb showed that the ten specimens clustered to-gether with P.mongolius with short genetic distance(p-distance=1.9%).We confirm that the ten specimens represent new distribution records for P.mongolius in Gansu and Qinghai Province.