Liu Shaoying, Liu Yang, Guo Peng, Sun Zhiyu, Murphy Robert W, Fan Zhenxin, Fu Jianrong, Zhang Yaping
Sichuan Academy of Forestry, Chengdu, Sichuan, China.
Zoolog Sci. 2012 Sep;29(9):610-22. doi: 10.2108/zsj.29.610.
The systematics of Oriental voles remains controversial despite numerous previous studies. In this study, we explore the systematics of all species of Oriental voles, except Eothenomys wardi, using a combination of DNA sequences and morphological data. Our molecular phylogeny, based on two mitochondrial genes (COI and cyt b), resolves the Oriental voles as a monophyletic group with strong support. Four distinct lineages are resolved: Eothenomys, Anteliomys, Caryomys, and the new subgenus Ermites. Based on morphology, we consider Caryomys and Eothenomys to be valid genera. Eothenomys, Anteliomys, and Ermites are subgenera of Eothenomys. The molecular phylogeny resolves subgenera Anteliomys and Ermites as sister taxa. Subgenus Eothenomys is sister to the clade Anteliomys + Ermites. Caryomys is the sister group to genus Eothenomys. Further, the subspecies E. custos hintoni and E. chinensis tarquinius do not cluster with E. custos custos and E. chinensis chinensis, respectively, and the former two taxa are elevated to species level and assigned to the new subgenus Ermites.
尽管之前有众多研究，但东方田鼠的系统分类仍存在争议。在本研究中，我们结合DNA序列和形态学数据，对除瓦氏东方田鼠（Eothenomys wardi）外的所有东方田鼠物种进行了系统分类研究。基于两个线粒体基因（COI和细胞色素b）构建的分子系统发育树，有力支持东方田鼠为单系类群的结论。研究确定了四个不同的谱系：东方田鼠属（Eothenomys）、高原田鼠属（Anteliomys）、绒鼠属（Caryomys）以及新亚属高山田鼠亚属（Ermites）。基于形态学，我们认为绒鼠属和东方田鼠属是有效属。东方田鼠属、高原田鼠属和高山田鼠亚属是东方田鼠属的亚属。分子系统发育树显示高原田鼠亚属和高山田鼠亚属为姐妹类群。东方田鼠亚属是高原田鼠亚属 + 高山田鼠亚属分支的姐妹类群。绒鼠属是东方田鼠属的姐妹类群。此外，指名东方田鼠指名亚种（E. custos custos）和中华东方田鼠指名亚种（E. chinensis chinensis）的亚种E. custos hintoni和E. chinensis tarquinius并未分别与指名东方田鼠指名亚种和中华东方田鼠指名亚种聚类，前两个分类单元被提升到物种水平，并归入新亚属高山田鼠亚属。
