KMS Institute of Vertebrate Paleontology and Paleoanthropology
| Morphology of an Early Oligocene beaver Propalaeocastor irtyshensis and the status of the genus Propalaeocastor | |
| Li, Luzhou1,2; Li, Qiang1,2,3; Lu, Xiaoyu1,2; Ni, Xijun1,2,3 | |
| 2017-05-16 | |
| 发表期刊 | PEERJ
 |
| 卷号 | 5 |
| 文章类型 | Article |
| 摘要 | The Early to Late Oligocene Propalaeocastor is the earliest known beaver genus from Eurasia. Although many species of this genus have been described, these species are defined based on very fragmentary specimens. Propalaeocastor irtyshensis from the Early Oligocene Irtysh River Formation in northwestern Xinjiang, China is one of the earliest-known members of Propalaeocastor. This species is defined on a single maxillary fragment. We revise the diagnosis of P. irtyshensis and the genus Propalaeocastor, based on newly discovered specimens from the Irtysh River Formation. The dental morphology of P. irtyshensis is very similar to other early castorids. The caudal palatine foramen of P. irtyshensis is situated in the maxillary-palatine suture. This is a feature generally accept as diagnostic character for the castorids. On the other hand, P. irtyshensis has two upper premolars, a rudimentarily developed sciuromorph-like zygomatic plate, and a relatively large protrogomorph-like infraorbital foramen. Some previous researchers suggested that Propalaeocastor is a junior synonym of Steneofiber, while other took it as a valid genus. Our morphological comparison and phylogenetic analysis suggest that Propalaeocastor differs from Steneofiber and is a valid genus. We also suggest that Agnotocastor aubekerovi, A. coloradensis, A. galushai, A. readingi, Oligotheriomys primus, and Steneofiber aff. dehmi should be referred to Propalaeocastor. Propalaeocastor is the earliest and most basal beaver. The origin place of Propalaeocastor and castorids is uncertain. The Early Oligocene radiation of castorids probably is propelled by the global climate change during the Eocene-Oligocene transition. |
| 关键词 | Xinjiang Beavers Propalaeocastor Early Oligocene Irtysh River Formation |
| WOS标题词 | Science & Technology |
| DOI | 10.7717/peerj.3311 |
| 关键词[WOS] | MIDDLE OLIGOCENE ; NUCLEAR GENES ; LATE EOCENE ; RODENTIA ; CASTORIDAE ; PHYLOGENY ; EVOLUTION ; MAMMALS ; SYSTEMATICS ; XINJIANG |
| 收录类别 | SCI |
| 语种 | 英语 |
| 项目资助者 | Strategic Priority Research Program of Chinese Academy of Sciences (CAS)(XDB03020000) ; National Basic Research Program of China(2012CB821904) ; CAS 100-talent Program ; National Natural Science Foundation of China(41472025 ; 41472002) |
| WOS研究方向 | Science & Technology - Other Topics |
| WOS类目 | Multidisciplinary Sciences |
| WOS记录号 | WOS:000401844200010 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.205/handle/311034/7570 |
| 专题 | 中科院古脊椎所（2000年以后） |
| 作者单位 | 1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Luzhou,Li, Qiang,Lu, Xiaoyu,et al. Morphology of an Early Oligocene beaver Propalaeocastor irtyshensis and the status of the genus Propalaeocastor[J]. PEERJ,2017,5. |
| APA | Li, Luzhou,Li, Qiang,Lu, Xiaoyu,&Ni, Xijun.(2017).Morphology of an Early Oligocene beaver Propalaeocastor irtyshensis and the status of the genus Propalaeocastor.PEERJ,5. |
| MLA | Li, Luzhou,et al."Morphology of an Early Oligocene beaver Propalaeocastor irtyshensis and the status of the genus Propalaeocastor".PEERJ 5(2017). |
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| peerj-3311.pdf（93077KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 下载 | |
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