【摘要】 2021年8月分别在湖南省长沙市天心区大托站立交桥底和昭华湘江大桥底捕获2只鼠耳蝠（2♂，标本号211521和211540），经鉴定为霍氏鼠耳蝠（Myotis horsfieldii），为湖南省蝙蝠分布新记录物种。本次捕获标本体型中等偏小，前臂长分别为36.1 mm(211521)和33.1 mm(211540)，头体长为44.0 mm和41.2 mm，后足长（10.5 mm和10.4 mm）超过胫骨长（16.4 mm和16.2 mm）的一半，耳屏长（5.1 mm和3.8 mm）不及耳长（12.5 mm和10.0 mm）的一半；头骨狭长，颅全长15.5 mm和15.0 mm，脑颅宽7.8 mm和7.5 mm，颅骨纤弱，额骨处有明显倾斜，脑颅高于上颌骨，颧弓较细。与来自泰国和印度尼西亚的霍氏鼠耳蝠标本相比，前臂长、头体长和尾长测量数据偏小，但头骨测量数据接近。基于Cyt b基因序列的系统发育分析表明，此次捕获的鼠耳蝠标本与霍氏鼠耳蝠聚类在一起，与来自香港的霍氏鼠耳蝠样本遗传距离仅为0.9%，故确定该物种为霍氏鼠耳蝠。标本保存于广东省科学院动物研究所。更多还原

【Abstract】 [Objectives] In China, Myotis horsfieldii was only to know distributed in Guangdong, Hainan and Hong Kong. This study aims to expand knowledge of geographical range of this species. [Methods] Two bat specimens(2♂: 211521 and 211540) were captured in the crack of the Datuo Station Interchange Bridge(112°57′24.4″E, 28°3′18.1″N, 44 m above sea level) and the Zhaohua Xiangjiang River Bridge(112°59′33.9″ E, 27°56′8.7″N, 39 m above sea level) in August, 2021 in Changsha City, Hunan Province,respectively. The morphological and skull features of the two specimens were measured using electronic digital caliper and combined with the data of NCBI for constructed phylogenetic tree using maximum likelihood in MEGA7.0 based on Cyt b gene sequences. [Results] The main diagnosis characteristics of the two specimens as follows. Medium to small body size, forearm lengths of 36.1 mm(211521) and 33.1 mm(211540) and head body lengths of 44.0 mm and 41.2 mm, respectively. Hind-foot lengths of 10.5 mm and 10.4 mm more than half of the tibia lengths of 16.4 mm and 16.2 mm, respectively(Fig. 1, Table 2). Narrow and long skull, greatest lengths of skull 15.5 mm and 15.0 mm, breadths of braincase 7.8 mm and 7.5 mm,respectively. Delicate skull with a marked inclination at the frontal bone, and the braincase is higher than the maxilla. Zygomatic arch is thinner(Fig. 2, Table 2). Phylogenetic analysis based on Cyt b gene sequences showed that the captured bats were well clustered with M. horsfieldii formerly discovered in Hong Kong,China or Malaysia, and the genetic distance was only 0.9% to the specimen from Hong Kong, China(Fig. 3,Table 1). [Conclusion] Therefore, the two bats were confirmed to M. horsfieldii, a new record for Hunan Province. The specimens were kept in Institute of Zoology, Guangdong Academy of Science.更多还原