KMS Institute of Vertebrate Paleontology and Paleoanthropology
| The ossified Meckel's cartilage and internal groove in Mesozoic mammaliaforms: implications to origin of the definitive mammalian middle ear | |
Meng, J ; Hu, YM; Wang, YQ; Li, CK; Meng, J (reprint author), Amer Museum Nat Hist, Div Palaeontol, Cent Pk W & 79th St, New York, NY 10024 USA.
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| 2003-08-01 | |
| 发表期刊 | ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
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| ISSN | 0024-4082 |
| 卷号 | 138期号:4页码:431-448 |
| 文章类型 | Article |
| 摘要 | The ossified Meckel's cartilage is described in detail from three adult individuals of two triconodont mammals, Repenomamus and Gobiconodon, which have been discovered in the Lower Cretaceous of Liaoning, China. A possible ossified Meckel's cartilage has also been recognized in the Early Cretaceous symmetrodont Zhangheotherium from Liaoning. The rod-like ossified Meckel's cartilage in Repenomamus bridges the dentary and the ear region of the cranium. Its shape and position are similar to those of Meckel's cartilage in prenatal and in some postnatal extant mammals. The ossified Meckel's cartilage may have functioned as an attachment site for the medial pterygoid muscle. These specimens provide direct evidence for the function of the internal groove which is commonly present in the dentary of early mammals and their relatives. The evidence weakens the hypothesis of multiple origins for the definitive mammalian middle ear. It supports the assumption that a persistent or ossified Meckel's cartilage has been present in adults of the common ancestor of mammals. The new evidence of Repenomamus does not support the model in which brain expansion and negative allometry of the auditory chain are primarily responsible for the detachment of ear ossicles in mammalian ontogeny and evolution. An alternative hypothesis is proposed which does not require brain expansion as the initial factor for the detachment of ear ossicles during mammalian evolution. (C) 2003 The Linnean Society of London.; The ossified Meckel's cartilage is described in detail from three adult individuals of two triconodont mammals, Repenomamus and Gobiconodon, which have been discovered in the Lower Cretaceous of Liaoning, China. A possible ossified Meckel's cartilage has also been recognized in the Early Cretaceous symmetrodont Zhangheotherium from Liaoning. The rod-like ossified Meckel's cartilage in Repenomamus bridges the dentary and the ear region of the cranium. Its shape and position are similar to those of Meckel's cartilage in prenatal and in some postnatal extant mammals. The ossified Meckel's cartilage may have functioned as an attachment site for the medial pterygoid muscle. These specimens provide direct evidence for the function of the internal groove which is commonly present in the dentary of early mammals and their relatives. The evidence weakens the hypothesis of multiple origins for the definitive mammalian middle ear. It supports the assumption that a persistent or ossified Meckel's cartilage has been present in adults of the common ancestor of mammals. The new evidence of Repenomamus does not support the model in which brain expansion and negative allometry of the auditory chain are primarily responsible for the detachment of ear ossicles in mammalian ontogeny and evolution. An alternative hypothesis is proposed which does not require brain expansion as the initial factor for the detachment of ear ossicles during mammalian evolution. (C) 2003 The Linnean Society of London. |
| 关键词 | Cretaceous Evolution Liaoning Mammalia Ontogeny Triconodonts |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| URL | 查看原文 |
| 关键词[WOS] | EVOLUTION ; MORGANUCODON ; DIDELPHIDAE ; PALEOCENE ; MONGOLIA ; REGION ; SKULL |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS研究方向 | Zoology |
| WOS类目 | Zoology |
| WOS记录号 | WOS:000184909500002 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.205/handle/311034/3713 |
| 专题 | 中科院古脊椎所（2000年以后） 古低等脊椎动物研究室 古哺乳动物研究室 |
| 通讯作者 | Meng, J (reprint author), Amer Museum Nat Hist, Div Palaeontol, Cent Pk W & 79th St, New York, NY 10024 USA. |
| 作者单位 | 1.Amer Museum Nat Hist, Div Palaeontol, New York, NY 10024 USA 2.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 3.CUNY, Grad Ctr, Biol Program, EEB, New York, NY 10016 USA 4.CUNY City Coll, New York, NY 10016 USA |
| 推荐引用方式 GB/T 7714 | Meng, J,Hu, YM,Wang, YQ,et al. The ossified Meckel's cartilage and internal groove in Mesozoic mammaliaforms: implications to origin of the definitive mammalian middle ear[J]. ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY,2003,138(4):431-448. |
| APA | Meng, J,Hu, YM,Wang, YQ,Li, CK,&Meng, J .(2003).The ossified Meckel's cartilage and internal groove in Mesozoic mammaliaforms: implications to origin of the definitive mammalian middle ear.ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY,138(4),431-448. |
| MLA | Meng, J,et al."The ossified Meckel's cartilage and internal groove in Mesozoic mammaliaforms: implications to origin of the definitive mammalian middle ear".ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY 138.4(2003):431-448. |
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