KMS Institute of Vertebrate Paleontology and Paleoanthropology
| A re-assessment of the oldest therapsid Raranimus confirms its status as a basal member of the clade and fills Olson's gap | |
Duhamel, A.1; Benoit, J.1; Rubidge, B. S.1; Liu, J.2
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| 2021-08-01 | |
| 发表期刊 | SCIENCE OF NATURE
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| ISSN | 0028-1042 |
| 卷号 | 108期号:4页码:12 |
| 摘要 | The non-mammalian therapsids comprise a paraphyletic assemblage of Permian-Jurassic synapsids closely related to mammals that includes six major clades of largely unresolved phylogenetic affinity. Understanding the early evolutionary radiation of therapsids is complicated by a gap in the fossil record during the Roadian (middle Permian) known as Olson's gap. Because of its early stratigraphic occurrence and its primitive features, Raranimus dashankouensis, from the Dashankou fauna (Rodian), Qingtoushan Formation (China), is currently considered the best candidate to fill this gap. However, it is known from only a single specimen, an isolated snout, which limits the amount of usable phylogenetic characters to reconstruct its affinities. In addition, understanding of the stratigraphy of the Qingtoushan Formation is poor. Here, we used CT scanning techniques to digitally reconstruct the bones and trigeminal canals of the snout of Raranimus in 3D. We confirm that Raranimus shares a high number of synapomorphies with more derived therapsids and is the only therapsid known so far to display a "pelycosaur"-like maxillary canal bearing a long caudal alveolar canal that gives off branches at regular intervals. This plesiomorphic feature supports the idea that Raranimus is basal to other therapsids. |
| 关键词 | Therapsid Olson's gap Trigeminal nerve |
| DOI | 10.1007/s00114-021-01736-y |
| 关键词[WOS] | MAMMAL-LIKE REPTILES ; SOUTH-AFRICAN KAROO ; TETRACERATOPS-INSIGNIS ; PHYLOGENETIC POSITION ; EARLY DIVERSIFICATION ; MORPHOLOGY ; EVOLUTION ; RADIATION ; SPECIMEN ; DINOCEPHALIA |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | Strategic Priority Research Program of Chinese Academy of Sciences[XDB26000000] ; DST-NRF Centre of Excellence in Palaeosciences ; African Origins Program of the National Research Foundation ; Postgraduate Merit Award of the University of the Witwatersrand |
| WOS研究方向 | Science & Technology - Other Topics |
| WOS类目 | Multidisciplinary Sciences |
| WOS记录号 | WOS:000660549800001 |
| 出版者 | SPRINGER HEIDELBERG |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.205/handle/311034/18347 |
| 专题 | 中科院古脊椎所（2000年以后） |
| 通讯作者 | Duhamel, A. |
| 作者单位 | 1.Univ Witwatersrand, Evolutionary Studies Inst, Johannesburg, South Africa 2.Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origins, Inst Vertebrate Paleontol & Paleoanthropol, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Duhamel, A.,Benoit, J.,Rubidge, B. S.,et al. A re-assessment of the oldest therapsid Raranimus confirms its status as a basal member of the clade and fills Olson's gap[J]. SCIENCE OF NATURE,2021,108(4):12. |
| APA | Duhamel, A.,Benoit, J.,Rubidge, B. S.,&Liu, J..(2021).A re-assessment of the oldest therapsid Raranimus confirms its status as a basal member of the clade and fills Olson's gap.SCIENCE OF NATURE,108(4),12. |
| MLA | Duhamel, A.,et al."A re-assessment of the oldest therapsid Raranimus confirms its status as a basal member of the clade and fills Olson's gap".SCIENCE OF NATURE 108.4(2021):12. |
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