| 王旭明,刘明,赵送萍,刘莹洵,王新,陈顺德,刘少英.2024.滇绒鼠在四川的分类与分布厘定.动物学杂志,59(2):210-216. |
| 滇绒鼠在四川的分类与分布厘定 |
| Determination of Classification and Distribution of Eothenomys eleusis (Thomas, 1911) from Sichuan Province |
| 投稿时间：2022-12-11 |
| DOI：10.13859/j.cjz.202422315 |
| 中文关键词: 滇绒鼠 绒鼠属 分类与分布 四川省 |
| 英文关键词:Eothenomys eleusis Eothenomys Classification and distribution Sichuan Province |
| 基金项目:国家自然科学基金项目(No. 31970399)，2023年四川省林业科学研究院基本科研项目(No. 2023JBKY09)； |
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| 中文摘要: |
| 2019至2023年，在四川省珙县(104°50′05″ E，27°54′27″ N，海拔1 331 m)和叙永县(105°32′05″ E，28°13′51″ N，海拔1 370 m)分别采集到2号和4号绒鼠类成体标本。这些标本个体较小，尾长约为体长的41%，形态鉴定属于滇绒鼠(Eothenomys eleusis)。对所采标本的Cyt b基因进行PCR扩增和测序，并结合从GenBank下载的绒鼠属物种序列构建贝叶斯基因树，结果显示：所采标本与滇绒鼠指名亚种(E. e. eleusis)聚为一个支系(贝叶斯后验概率为1.0)，遗传距离为0.8%，与滇绒鼠aurora亚种(E. e. aurora)的遗传距离为2.5%。根据标本形态、头骨特征，结合分子生物学证据，确定所采6号标本为滇绒鼠，是该物种在四川省的首次确认分布记录。标本现存于四川省林业科学研究院动物标本馆(编号分别为SAF19843、SAF19844、SAF220125、SAF220131、SAF23176和SAF23177)。 |
| 英文摘要: |
| [Objectives] From 2019 to 2023, 2 specimens of the genus Eothenomys were collected from Gong County (104°50′05″ E, 27°54′27″ N, 1 331 m) and 4 from Xuyong County (105°32′05″ E, 28°13′51″ N, 1 370 m), both in southern Sichuan. These specimens were tentatively identified as Eothenomys eleusis, but their species status is controversial. Recently, E. eleusis has been confirmed as an independent species by morphological and molecular phylogenetics studies. Current research has shown that there are errors in the identification of E. eleusis distributed in Shimian, Meigu, Muli, and other places in Sichuan. In this study, we aim to identify these 6 specimens to update the records of the distribution range of E. eleusis. [Methods] The specimens (voucher numbers:SAF19843, SAF19844, SAF220125, SAF220131, SAF23176, and SAF23177) are stored at the Animal Herbarium of Sichuan Academy of Forestry. We measured the external measurement and skull measurement in 3 of these specimens and compared them with type specimens. Meanwhile, we sequenced the Cyt b gene in 4 of these specimens, and estimated Kimura 2-parameter (K2P) genetic distance using these sequences. In addition, we used the Cyt b gene sequences to construct a Bayesian phylogeny tree of the genus Eothenomys. [Results] According to the morphological description (Fig. 1) and comparison (Table 1) of 3 specimens collected in Sichuan, their tail lengths were about 41% of their body lengths, and the total length of cranium was less than 26.50 mm, which was consistent with that of the E. eleusis. In the phylogeny tree of the genus Eothenomys, the specimens collected in Sichuan and E. e. eleusis was the first cluster, which with E. e. aurora was the second cluster, and then with E. miletus to be the third cluster. The K2P genetic distance between the samples from Sichuan and E. e. eleusis is 0.8%, while between the samples from Sichuan and E. e. aurora is 2.5%. [Conclusion] The classification of E. eleusis is discussed in this paper and confirms the distribution of the E. eleusis in Sichuan. The morphological characteristics of E. eleusis in Sichuan are consistent with those of E. e. aurora, but their genetic relationship is closer to E. e. eleusis in terms of molecular genetic information, which indicate the differentiation of subspecies cannot be reflected in the genetic information of a single gene or several genes, and this discovery provides a reference for species classification research and zoogeography research. |
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