KMS Institute of Vertebrate Paleontology and Paleoanthropology
| A new species of the "condylarth" Hyopsodus from the middle Eocene of the Erlian Basin, Inner Mongolia, China, and its biostratigraphic implications | |
Bai, Bin1,2 ; Wang, Yuan-Qing1,3; Zhang, Xin-Yue1,2,4; Meng, Jin1,5,6
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| 2021 | |
| 发表期刊 | ACTA PALAEONTOLOGICA POLONICA
 |
| ISSN | 0567-7920 |
| 卷号 | 66期号:4页码:767-777 |
| 摘要 | The "condylarth" genus Hyopsodus is diverse and abundantly represented in Eocene mammalian faunas of North America. In contrast, fossil specimens of Hyopsodus are rather sparse in Eurasia. Only four species of Hyopsodus are known from Asia and two from Europe, as compared to the 18 species of Hyopsodus described from North America. Here, we report a new species of Hyopsodus, Hyopsodus arshantensis sp. nov., from the middle part of the Arshanto Formation in the Erlian Basin, Inner Mongolia, China. The holotype and only specimen of the new species, a right mandible with m1-m2, exhibits a unique combination of characters on m1-m2 not present in other species of Hyopsodus, including a moderately lophodont crown, a long trigonid without a paraconid, an obliquely aligned protolophid, an angle between the cristid obliqua and the posthypocristid slightly greater than 90 degrees, a midline position of the hypoconulid, and a relatively large entoconid. The m1-m2 morphology of H. arshantensis is intermediate between specimens of Hyopsodus from the Wasatchian and Uintan North American Land Mammal Ages (NALMA), and is comparable to that of Hyopsodus from the Bridgerian NALMA. Moreover, its relatively large size is near the size range present among the late Bridgerian species of Hyopsodus. Based on those similarities, in combination with a few fossil mammals from overlying layers, the middle part of the Arshanto Formation could be correlated in part to the late Bridgerian, and the upper part of the Arshanto Formation may bracket the time interval equivalent to the Bridgerian/Uintan boundary. That proposed correlation and somewhat different faunas recognized within the Arshanto Formation suggest that it may be necessary to subdivide the Arshantan Asian Land Mammal Age (ALMA) and/or redefine the Arshantan/Irdinmanhan ALMA boundary in future comprehensive studies. |
| 关键词 | Mammalia Hyopsodus "condylarth" Eocene Arshanto Formation Erlian Basin China |
| DOI | 10.4202/app.00908.2021 |
| 关键词[WOS] | REVISION ; PHYLOGENY ; WASATCH |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | Strategic Priority Research Program of Chinese Academy of Sciences[XDB26000000] ; National Natural Science Foundation of China[41672014] ; Division of Paleontology, American Museum of Natural History ; Youth Innovation Promotion Association CAS[2017101] ; Special Research Program of Basic Science and Technology of the Ministry of Science and Technology[2015FY310100] |
| WOS研究方向 | Paleontology |
| WOS类目 | Paleontology |
| WOS记录号 | WOS:000735377100004 |
| 出版者 | INST PALEOBIOLOGII PAN |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.205/handle/311034/21500 |
| 专题 | 中科院古脊椎所（2000年以后） |
| 通讯作者 | Bai, Bin |
| 作者单位 | 1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China 2.CAS Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Amer Museum Nat Hist, Div Paleontol, New York, NY 10024 USA 6.CUNY, Grad Ctr, Earth & Environm Sci, New York, NY 10016 USA |
| 推荐引用方式 GB/T 7714 | Bai, Bin,Wang, Yuan-Qing,Zhang, Xin-Yue,et al. A new species of the "condylarth" Hyopsodus from the middle Eocene of the Erlian Basin, Inner Mongolia, China, and its biostratigraphic implications[J]. ACTA PALAEONTOLOGICA POLONICA,2021,66(4):767-777. |
| APA | Bai, Bin,Wang, Yuan-Qing,Zhang, Xin-Yue,&Meng, Jin.(2021).A new species of the "condylarth" Hyopsodus from the middle Eocene of the Erlian Basin, Inner Mongolia, China, and its biostratigraphic implications.ACTA PALAEONTOLOGICA POLONICA,66(4),767-777. |
| MLA | Bai, Bin,et al."A new species of the "condylarth" Hyopsodus from the middle Eocene of the Erlian Basin, Inner Mongolia, China, and its biostratigraphic implications".ACTA PALAEONTOLOGICA POLONICA 66.4(2021):767-777. |
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