贵州六盘水发现东阳江麝鼩  

Crocidura dongyangjiangensis Found in Liupanshui,Guizhou Province

作　　者：刘铸[1] 张智慧 栾天琪 韩美凤 高艺 蔡赫[1] 陈欢[1] 金志民[1] 张隽晟[1] LIU Zhu;ZHANG Zhi-Hui;LUAN Tian-Qi;HAN Mei-Feng;GAO Yi;CAI He;CHEN Huan;JIN Zhi-Min;ZHANG Jun-Sheng(College of Life Science and Technology,Mudanjiang Normal University,Mudanjiang 157011,China)

机构地区：[1]牡丹江师范学院生命科学与技术学院,牡丹江157011

出　　处：《动物学杂志》2024年第1期115-120,共6页Chinese Journal of Zoology

基　　金：黑龙江省省属高等学校基本科研业务费科研项目(No.1451PT008,1355JG002,1451TD002);黑龙江省自然基金项目(No.LH2021C095);牡丹江师范学院科研项目(No.GP2022009)。

摘　　要：在贵州省六盘水市杨梅乡慕尼克村,利用陷阱法捕捉到3号麝鼩属(Crocidura)标本。本次采集标本的体形较小,头体长(49.0±0.8)mm,尾长[(41.8±4.2)mm]略短于头体长(尾长/头体长为85%)。背毛呈浅灰褐色,腹毛颜色浅于背毛,呈灰色。尾部双色,背侧黑褐色,腹侧淡于背侧。前足背部白色,后足则为淡灰色。尾近乎裸露,尾基约1/3着生稀疏白色长毛。颅全长(15.92±0.55)mm,脑颅高(4.75±0.18)mm。上门齿1枚,有一长而大的前尖和一小而矮的后尖。上单尖齿3枚,第1单尖齿最大,第2单尖齿略大于第3单尖齿,1枚第四前臼齿(P4),3枚臼齿。上述特征与东阳江麝鼩(C.dongyangjiangensis)模式标本的描述和鉴定特征基本一致,因此将3号采集标本鉴定为东阳江麝鼩。基于Cyt b基因进行分子系统发育分析,采集标本与麝鼩属物种中的东阳江麝鼩遗传距离最近,在0.004~0.027之间。系统发生树显示,3号标本与东阳江麝鼩构成一个单系进化分支,进一步证实本次采集的3号标本是东阳江麝鼩,为贵州省分布新记录种。Three specimens of Crocidura were trapped by the pitfall trap method in Munike Village,Yangmei Township,Liupanshui City,Guizhou Province,China.The specimens collected are smaller(49.0±0.8 mm).The tail length(41.8±4.2 mm)is slightly shorter than the head and body length(tail length/head and body length is 85%)(Table 2).The back hair is light grayish brown,and the ventral hair is gray,which is lighter than the back hair.The tail is bicolor,black-brownish above,and paler beneath.The back of the front foot is white,and of the back foot is light gray.The tail is almost bare,and long sparse hairs are present at the base of one-third of the tail.Condyloincisive length is 15.92±0.55 mm.The height of the braincase is 4.75±0.18mm.The specimen has one upper incisor,with a long and large anterior tip and a small and low posterior tip.There were 3 upper unicuspid teeth,the first unicuspid tooth is the largest,and the second unicuspid tooth is slightly larger than the third one.There are one P4 and 3 molars in the maxillary.The above characteristics are consistent with the description and identification of the type specimen of C.dongyangjiangensis.The specimens collected are determined to be C.dongyangjiangensis.The genetic distances between C.dongyangjiangensis specimen recorded and our specimens are the nearest,between 0.004 and 0.027,based on the mitochondrial cytochrome b gene.It was shown that our specimen lay in a monophyletic clade together with C.dongyangjiangensis in the phylogenetic tree(Fig.2).It is further confirmed that the 3 specimens collected are C.dongyangjiangensis.

关 键 词：鼩形目 东阳江麝鼩 贵州省 分布新记录种 

分 类 号：Q959[生物学—动物学]