https://orcid.org/0000-0003-1274-259X
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Wen-Yu Song, Zhong-Zheng Chen, Quan Li, Wen-Hao Hu, Hong-Wei Zhou, Meng-Ru Xie, Xue-You Li, Xue-Long Jiang, Taxonomic revision of the Long-tailed Mole (Talpidae: Scaptonyx) with description of a new species from the Gaoligong Mountains, Journal of Mammalogy, 2025;, gyae142, https://doi.org/10.1093/jmammal/gyae142
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Abstract
Scaptonyx fusicauda Milne-Edwards, 1872, is a mole species and a burrowing animal occurring from central China to northeastern Myanmar and northern Vietnam. This is the only extant species currently known in the genus Scaptonyx (Talpidae), but recent studies have revealed highly diverse lineages within this taxon. However, the broken type specimen and unspecified type locality of this species have hindered comparison between specimens towards a taxonomic evaluation. We reviewed the literature documenting the expeditions of the collector Armand David and narrowed down the type locality of this species to Minshan Mountain, western Sichuan, China. We compared S. fusicauda topotypes with specimens from 2 separated mountain ranges in western Yunnan, China—S. f. affinis Thomas, 1912 from the Baima Mountain and an undescribed species (S. sp. 1) from the Gaoligong Mountains. Specimens from the 3 localities can be distinguished by multiple external, craniomandibular, and dental characteristics. Phylogenies based on mitochondrial and nuclear genes also provided consistent topologies supporting S. fusicauda, S. f. affinis, and S. sp. 1 as distinct monophyletic species. Scaptonyx sp. 1 split from the sister clade (S. fusicauda + S. f. affinis) ca. 19.79 Ma, while S. f. affinis split from S. fusicauda ca. 9.56 Ma. Following these findings, we recognize S. f. affinis as a distinct species, S. affinis, and describe S. sp. 1 as a new species. Scaptonyx fusicauda occurs in the Sichuan Basin to the west, S. affinis from the mountains in the east of the Salween River to central China and northern Vietnam, and S. sp. 1 in the Gaoligong Mountains on the watersheds of the Irrawaddy and Salween rivers—encompassing western Yunnan, China, and northeastern Myanmar.
摘要
长尾鼹Scaptonyx fusicauda Milne-Edwards, 1872是分布于中国中部至西南部、缅甸东北部和越南北部的一种小型鼹科Talpidae动物。该物种是长尾鼹属Scaptonyx的唯一现存物种。近年来的研究提示该种存在高度分化的支系。然而由于模式标本破损且模式产地不清限制了该类群的分类研究进一步开展。本研究回顾了模式标本采集者谭卫道 (Armand David) 的旅程, 最终确认该物种的模式产地为中国四川岷山地区的岷江源附近。我们比较了岷江源与中国云南西部白马雪山的S. f. affinis Thomas, 1912和采自高黎贡山的Scaptonyx sp. 1的标本, 发现这三个地点的标本可以通过多个外形、颅骨和牙齿特征区分。基于线粒体和核基因构建的系统发育树也显示它们之间出现了高度的分化。分歧时间分析显示S. sp. 1与姐妹类群 (S. fusicauda + S. f.affinis) 的分化时间约为19.79 Ma, 而S. f. affinis与S.fusicauda的分化时间约为9.56 Ma。根据这些发现, 我们将S. f.affinis提升为独立物种: S. affinis, 并将S. sp. 1描述为一新物种: S. wangi。S. fusicauda分布在四川西部的山地和高原地区; S. affinis分布在怒江以东至中国中部的山地和越南北部: S.wangi分布在高黎贡地区 (伊洛瓦底江和怒江分水岭), 包括中国云南西部和缅甸东北部。
