KMS Institute of Vertebrate Paleontology and Paleoanthropology
| The asymmetry of the carpal joint and the evolution of wing folding in maniraptoran theropod dinosaurs | |
| Sullivan, Corwin; Hone, David W. E.; Xu, Xing; Zhang, Fucheng; csullivan@ivpp.ac.cn | |
| 2010-07-07 | |
| 发表期刊 | PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
 |
| ISSN | 0962-8452 |
| 卷号 | 277期号:1690页码:2027-2033 |
| 文章类型 | Article |
| 摘要 | In extant birds, the hand is permanently abducted towards the ulna, and the wrist joint can bend extensively in this direction to fold the wing when not in use. Anatomically, this asymmetric mobility of the wrist results from the wedge-like shape of one carpal bone, the radiale, and from the well-developed convexity of the trochlea at the proximal end of the carpometacarpus. Among the theropod precursors of birds, a strongly convex trochlea is characteristic of Coelurosauria, a clade including the highly derived Maniraptora in addition to tyrannosaurs and compsognathids. The shape of the radiale can be quantified using a 'radiale angle' between the proximal and distal articular surfaces. Measurement of the radiale angle and reconstruction of ancestral states using squared-change parsimony shows that the angle was small (15 degrees) in primitive coelurosaurs but considerably larger (25 degrees) in primitive maniraptorans, indicating that the radiale was more wedge-shaped and the carpal joint more asymmetric. The radiale angle progressively increased still further within Maniraptora, with concurrent elongation of the forelimb feathers and the forelimb itself. Carpal asymmetry would have permitted avian-like folding of the forelimb in order to protect the plumage, an early advantage of the flexible, asymmetric wrist inherited by birds. |
| 关键词 | Theropoda Maniraptora Aves Carpus Radiale Feathers |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| URL | 查看原文 |
| 关键词[WOS] | CHINA ; FLIGHT ; OSTEOLOGY ; FEATHERS ; FORELIMB ; ELEMENTS ; WRIST |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS研究方向 | Life Sciences & Biomedicine - Other Topics ; Environmental Sciences & Ecology ; Evolutionary Biology |
| WOS类目 | Biology ; Ecology ; Evolutionary Biology |
| WOS记录号 | WOS:000278056400011 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.205/handle/311034/4547 |
| 专题 | 中科院古脊椎所（2000年以后） |
| 通讯作者 | csullivan@ivpp.ac.cn |
| 作者单位 | Chinese Acad Sci, Inst Vertebrate Palaeontol & Palaeoanthropol, Key Lab Evolutionary Systemat Vertebrates, Beijing 100044, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sullivan, Corwin,Hone, David W. E.,Xu, Xing,et al. The asymmetry of the carpal joint and the evolution of wing folding in maniraptoran theropod dinosaurs[J]. PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES,2010,277(1690):2027-2033. |
| APA | Sullivan, Corwin,Hone, David W. E.,Xu, Xing,Zhang, Fucheng,&csullivan@ivpp.ac.cn.(2010).The asymmetry of the carpal joint and the evolution of wing folding in maniraptoran theropod dinosaurs.PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES,277(1690),2027-2033. |
| MLA | Sullivan, Corwin,et al."The asymmetry of the carpal joint and the evolution of wing folding in maniraptoran theropod dinosaurs".PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES 277.1690(2010):2027-2033. |
| 条目包含的文件 | 下载所有文件 | |||||
| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Sullivan et al., 201（587KB） | 期刊论文 | 出版稿 | 开放获取 | ODC PDDL | 浏览 下载 | |
| The asymmetry of the（217KB） | 期刊论文 | 出版稿 | 开放获取 | ODC PDDL | 浏览 下载 | |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
修改评论