摘要 目前对藏鼩鼱(Sorex thibetanus)和甘肃鼩鼱(Sorex cansulus)的分布范围和生物学资料了解较少。2017年,在云南省西北部的高山区域采集了48号鼩鼱属(Sorex)动物标本。用形态学和基于Cyt b基因的分子系统学对采集标本进行了物种鉴定。结果显示来自4个地点的27号标本形态上与藏鼩鼱相符,来自2个地点的21号标本与甘肃鼩鼱相似,但存在一定差异。基于Kimura-2-parameter的遗传距离显示,藏鼩鼱组内遗传距离为0.46%,甘肃鼩鼱组内遗传距离为0.42%。它们与其它鼩鼱属物种的组间遗传距离分别为10.76%~17.04%和6.59%~14.52%。最大似然(Maximum likelihood)树结果显示,来自云南省西北部的两种鼩鼱动物分别与藏鼩鼱(BS=71%)和甘肃鼩鼱(BS=100%)构成单系。上述结果支持这两种鼩鼱属动物分别为藏鼩鼱和甘肃鼩鼱,均为云南省兽类新纪录。 Tibetan shrew(Sorex thibetanus) and Gansu shrew(Sorex cansulus) are two poorly known species of the genus Sorex.In 2017,48 specimens of Sorex were collected in alpine areas of north-west Yunnan.The morphological characteristics and measurements of these specimens were compared with previous specimen records, and their phylogenetic relationships with other Sorex species were assessed based on Cyt b gene.Results show that 27 specimens from 4 sites are morphologically similar to S.thibetanus,while other 21 specimens from 2 sites are morphologically similar to S.cansulus,although with considerable differences.The intraspecific Kimura-2-parameter distance based on Cyt b was 0.46% for S. thibetanus and 0.42% for S. cansulus,while the distances between these two species to other Sorex species were 10.76%-17.04% and 6.59%-14.52%,respectively.Maximum likelihood phylogenetic analyses support the two species are monophyletic to S.thibetanus(BS=71%) and S.cansulus(BS=100%),which both are new mammal records in Yunnan Province.
出处 《兽类学报》 CAS CSCD 北大核心 2021年第3期352-360,共9页 Acta Theriologica Sinica
基金 第二次青藏高原综合考察研究专题(2019QZKK0501) 国家重点研发计划课题(2017YFC0505200)。
分类号 Q958.1 [生物学—动物学]
