KMS Institute of Vertebrate Paleontology and Paleoanthropology
| An Early Cretaceous enantiornithine (Aves) preserving an unlaid egg and probable medullary bone | |
Bailleul, Alida M.1,2; O'Connor, Jingmai1,2; Zhang, Shukang1,2; Li, Zhiheng1,2; Wang, Qiang1,2,3 ; Lamanna, Matthew C.4; Zhu, Xufeng1,2,3; Zhou, Zhonghe1,2,3
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| 2019-03-20 | |
| 发表期刊 | NATURE COMMUNICATIONS
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| ISSN | 2041-1723 |
| 卷号 | 10页码:10 |
| 通讯作者 | Bailleul, Alida M.([email protected]) |
| 摘要 | Understanding non-crown dinosaur reproduction is hindered by a paucity of directly associated adults with reproductive traces. Here we describe a new enantiornithine, Avimaia schweitzerae gen. et sp. nov., from the Lower Cretaceous Xiagou Formation with an unlaid egg two-dimensionally preserved within the abdominothoracic cavity. Ground-sections reveal abnormal eggshell proportions, and multiple eggshell layers best interpreted as a multilayered egg resulting from prolonged oviductal retention. Fragments of the shell membrane and cuticle are both preserved. SEM reveals that the cuticle consists of nanostructures resembling those found in neornithine eggs adapted for infection-prone environments, which are hypothesized to represent the ancestral avian condition. The femur preserves small amounts of probable medullary bone, a tissue found today only in reproductively active female birds. To our knowledge, no other occurrence of Mesozoic medullary bone is associated with indications of reproductive activity, such as a preserved egg, making our identification unique, and strongly supported. |
| DOI | 10.1038/s41467-019-09259-x |
| 关键词[WOS] | THEROPOD DINOSAUR ; SEXUAL-MATURITY ; GANSU PROVINCE ; EGGSHELL ; EVOLUTION ; GROWTH ; BIRDS ; ORNITHOTHORACES ; PRESERVATION ; REVEALS |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | National Natural Science Foundation of China[41688103] ; Chinese Academy of Sciences-President's International Fellowship Initiative (CAS-PIFI) program ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB26000000] |
| 项目资助者 | National Natural Science Foundation of China ; Chinese Academy of Sciences-President's International Fellowship Initiative (CAS-PIFI) program ; Strategic Priority Research Program of Chinese Academy of Sciences |
| WOS研究方向 | Science & Technology - Other Topics |
| WOS类目 | Multidisciplinary Sciences |
| WOS记录号 | WOS:000461757600004 |
| 出版者 | NATURE PUBLISHING GROUP |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.205/handle/311034/9468 |
| 专题 | 中国科学院古脊椎动物与古人类研究所 |
| 通讯作者 | Bailleul, Alida M. |
| 作者单位 | 1.Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, 142 Xizhimenwai Dajie, Beijing 100044, Peoples R China 2.CAS Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 4.Carnegie Museum Nat Hist, Sect Vertebrate Paleontol, Pittsburgh, PA 15213 USA |
| 推荐引用方式 GB/T 7714 | Bailleul, Alida M.,O'Connor, Jingmai,Zhang, Shukang,et al. An Early Cretaceous enantiornithine (Aves) preserving an unlaid egg and probable medullary bone[J]. NATURE COMMUNICATIONS,2019,10:10. |
| APA | Bailleul, Alida M..,O'Connor, Jingmai.,Zhang, Shukang.,Li, Zhiheng.,Wang, Qiang.,...&Zhou, Zhonghe.(2019).An Early Cretaceous enantiornithine (Aves) preserving an unlaid egg and probable medullary bone.NATURE COMMUNICATIONS,10,10. |
| MLA | Bailleul, Alida M.,et al."An Early Cretaceous enantiornithine (Aves) preserving an unlaid egg and probable medullary bone".NATURE COMMUNICATIONS 10(2019):10. |
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