Xu Yifan, Hu Jiangxiao, Shi Zifan, Chen Wenwen, Zhou Jiajun, Zhang Baowei, Yong Fan, Khanal Laxman, Jiang Xuelong, Chen Zhongzheng
Collaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-founded by Anhui Province and Ministry of Education, School of Ecology and Environment Anhui Normal University Wuhu China.
State Key Laboratory of Genetic Resources and Evolution & Yunnan Key Laboratory of Biodiversity and Ecological Security of Gaoligong Mountain, Kunming Institute of Zoology Chinese Academy of Sciences Kunming China.
Ecol Evol. 2023 Jul 4;13(7):e10234. doi: 10.1002/ece3.10234. eCollection 2023 Jul.
The Bower's Berylmys () is one of the largest rodent species with a wide distribution range in southern China and the Indochinese Peninsula. The taxonomy and evolutionary history of the is still controversial and confusing. In this study, we used two mitochondrial ( and ) and three nuclear (, , and ) genes to estimate the phylogeny, divergence times, and biogeographic history of . We also explored morphological variations among the specimens collected across China. Our phylogenetic analyses indicated that the traditional contains at least two species: and . was considered a junior synonym of distributed in eastern China, which is confirmed to be distinguishable at specific level because of its larger size, relatively larger and whiter hind feet, and several cranial traits. The estimated split of and was at the early Pleistocene (ca. 2.00 Mya), which might be the outcome of the combined effects of climate change in the early Pleistocene and isolation by the Minjiang River. Our results highlight the Wuyi Mountains in northern Fujian, China, as a glacial refugia during the Pleistocene and call for more intensive surveys and systematic revisions of small mammals in eastern China.
鲍氏东方田鼠（Bower's Berylmys）是中国南方和印度支那半岛分布范围广泛的最大啮齿动物物种之一。该物种的分类学和进化历史仍然存在争议且令人困惑。在本研究中，我们使用了两个线粒体基因（cytochrome b和control region）和三个核基因（IRBP、RAG1和vWF）来估计鲍氏东方田鼠的系统发育、分歧时间和生物地理历史。我们还探究了在中国各地采集的标本之间的形态变异。我们的系统发育分析表明，传统的鲍氏东方田鼠至少包含两个物种：B. bowersi和B. tanakae。B. tanakae曾被认为是分布于中国东部的B. bowersi的次异名，因其体型较大、后足相对更大且更白以及一些颅骨特征，被证实可在种级水平上区分开来。B. bowersi和B. tanakae的估计分歧时间为早更新世（约2.00百万年前），这可能是早更新世气候变化和闽江隔离共同作用的结果。我们的研究结果突出了中国福建北部的武夷山作为更新世冰川避难所的地位，并呼吁对中国东部的小型哺乳动物进行更深入的调查和系统修订。
