| On the absence of sternal elements in Anchiornis (Paraves) and Sapeornis (Aves) and the complex early evolution of the avian sternum | |
Zheng, Xiaoting1,2; O'Connor, Jingmai3; Wang, Xiaoli1; Wang, Min3; Zhang, Xiaomei2; Zhou, Zhonghe3 ; O'Connor, J (reprint author), Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China.
| |
| 2014-09-23 | |
| 发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
 |
| ISSN | 0027-8424 |
| 卷号 | 111期号:38页码:13900-13905 |
| 文章类型 | Article |
| 摘要 | Anchiornis (Deinonychosauria: Troodontidae), the earliest known feathered dinosaur, and Sapeornis (Aves: Pygostylia), one of the basalmost Cretaceous birds, are both known from hundreds of specimens, although remarkably not one specimen preserves any sternal ossifications. We use histological analysis to confirm the absence of this element in adult specimens. Furthermore, the excellent preservation of soft-tissue structures in some specimens suggests that no chondrified sternum was present. Archaeopteryx, the oldest and most basal known bird, is known from only 10 specimens and the presence of a sternum is controversial; a chondrified sternumis widely considered to have been present. However, data from Anchiornis and Sapeornis suggest that a sternum may also have been completely absent in this important taxon, suggesting that the absence of a sternum could represent the plesiomorphic avian condition. Our discovery reveals an unexpected level of complexity in the early evolution of the avian sternum; the large amount of observable homoplasy is probably a direct result of the high degree of inherent developmental plasticity of the sternum compared with observations in other skeletal elements. |
| 关键词 | Maniraptora Mesozoic Jehol Flight Histology |
| WOS标题词 | Science & Technology |
| 关键词[WOS] | ORNITHUROMORPH BIRD ; CRETACEOUS BIRD ; CHINA ; ARCHAEOPTERYX ; DINOSAUR ; THEROPOD ; CHAOYANGENSIS ; FEATHERS ; ANATOMY ; ORIGIN |
| 收录类别 | SCI |
| 语种 | 英语 |
| 项目资助者 | National Basic Research Program of China 973 Program [2012CB821906]; National Natural Science Foundation of China [41172020, 41372014, 41172016]; Chinese Academy of Sciences |
| WOS研究方向 | Science & Technology - Other Topics |
| WOS类目 | Multidisciplinary Sciences |
| WOS记录号 | WOS:000341988200056 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.205/handle/311034/5131 |
| 专题 | 古低等脊椎动物研究室 |
| 通讯作者 | O'Connor, J (reprint author), Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China. |
| 作者单位 | 1.Linyi Univ, Inst Geol & Paleontol, Linyi 276000, Shandong, Peoples R China 2.Shandong Tianyu Museum Nat, Pingyi 273300, Shandong, Peoples R China 3.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, Xiaoting,O'Connor, Jingmai,Wang, Xiaoli,et al. On the absence of sternal elements in Anchiornis (Paraves) and Sapeornis (Aves) and the complex early evolution of the avian sternum[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2014,111(38):13900-13905. |
| APA | Zheng, Xiaoting.,O'Connor, Jingmai.,Wang, Xiaoli.,Wang, Min.,Zhang, Xiaomei.,...&O'Connor, J .(2014).On the absence of sternal elements in Anchiornis (Paraves) and Sapeornis (Aves) and the complex early evolution of the avian sternum.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,111(38),13900-13905. |
| MLA | Zheng, Xiaoting,et al."On the absence of sternal elements in Anchiornis (Paraves) and Sapeornis (Aves) and the complex early evolution of the avian sternum".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 111.38(2014):13900-13905. |
| 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 | ||
| On the absence of st（1457KB） | 开放获取 | CC BY-NC-SA | 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