A Middle Jurassic 'sphenosuchian' from China and the origin of the crocodylian skull
文献类型：期刊论文
| 作者 | Clark, JM; Xu, X; Forster, CA; Wang, Y; Clark, JM (reprint author), George Washington Univ, Dept Biol Sci, Washington, DC 20052 USA. |
| 刊名 | NATURE
 |
| 出版日期 | 2004-08-26 |
| 卷号 | 430期号:7003页码:1021-1024 |
| ISSN号 | 0028-0836 |
| 文献子类 | Article |
| 英文摘要 | The skull of living crocodylians is highly solidified and the jaw closing muscles are enlarged(1), allowing for prey capture by prolonged crushing between the jaws. Living species are all semi-aquatic, with sprawling limbs and a broad body that moves mainly from side-to-side(2); however, fossils indicate that they evolved from terrestrial forms. The most cursorial of these fossils(3-6) are small, gracile forms often grouped together as the Sphenosuchia, with fully erect, slender limbs; their relationships, however, are poorly understood(5,7-10). A new crocodylomorph from deposits in northwestern China of the poorly known Middle Jurassic epoch possesses a skull with several adaptations typical of living crocodylians. Postcranially it is similar to sphenosuchians but with even greater adaptations for cursoriality in the forelimb. Here we show, through phylogenetic analysis, that it is the closest relative of the large group Crocodyliformes, including living crocodylians. Thus, important features of the modern crocodylian skull evolved during a phase when the postcranial skeleton was evolving towards greater cursoriality, rather than towards their current semi-aquatic habitus.; The skull of living crocodylians is highly solidified and the jaw closing muscles are enlarged(1), allowing for prey capture by prolonged crushing between the jaws. Living species are all semi-aquatic, with sprawling limbs and a broad body that moves mainly from side-to-side(2); however, fossils indicate that they evolved from terrestrial forms. The most cursorial of these fossils(3-6) are small, gracile forms often grouped together as the Sphenosuchia, with fully erect, slender limbs; their relationships, however, are poorly understood(5,7-10). A new crocodylomorph from deposits in northwestern China of the poorly known Middle Jurassic epoch possesses a skull with several adaptations typical of living crocodylians. Postcranially it is similar to sphenosuchians but with even greater adaptations for cursoriality in the forelimb. Here we show, through phylogenetic analysis, that it is the closest relative of the large group Crocodyliformes, including living crocodylians. Thus, important features of the modern crocodylian skull evolved during a phase when the postcranial skeleton was evolving towards greater cursoriality, rather than towards their current semi-aquatic habitus. |
| URL标识 | 查看原文 |
| WOS关键词 | BASAL CROCODYLOMORPH ARCHOSAURS ; EVOLUTION ; ONTOGENY |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000223514900041 |
| 公开日期 | 2013-11-27 |
| 源URL | [http://119.78.100.205/handle/311034/3644]  |
| 专题 | 古脊椎动物与古人类研究所_图书馆1 |
| 通讯作者 | Clark, JM (reprint author), George Washington Univ, Dept Biol Sci, Washington, DC 20052 USA. |
| 作者单位 | 1.George Washington Univ, Dept Biol Sci, Washington, DC 20052 USA 2.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 3.SUNY Stony Brook, Dept Anat Sci, Stony Brook, NY 11794 USA |
| 推荐引用方式 GB/T 7714 | Clark, JM,Xu, X,Forster, CA,et al. A Middle Jurassic 'sphenosuchian' from China and the origin of the crocodylian skull[J]. NATURE,2004,430(7003):1021-1024. |
| APA | Clark, JM,Xu, X,Forster, CA,Wang, Y,&Clark, JM .(2004).A Middle Jurassic 'sphenosuchian' from China and the origin of the crocodylian skull.NATURE,430(7003),1021-1024. |
| MLA | Clark, JM,et al."A Middle Jurassic 'sphenosuchian' from China and the origin of the crocodylian skull".NATURE 430.7003(2004):1021-1024. |
入库方式： OAI收割
来源：古脊椎动物与古人类研究所
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