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An Early Cretaceous enantiornithine (Aves) preserving an unlaid egg and probable medullary bone

文献类型：期刊论文

作者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
刊名NATURE COMMUNICATIONS
出版日期2019-03-20
卷号10页码:10
ISSN号2041-1723
DOI10.1038/s41467-019-09259-x
通讯作者Bailleul, Alida M.(alida.bailleul@ivpp.ac.cn)
英文摘要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.
WOS关键词THEROPOD DINOSAUR ; SEXUAL-MATURITY ; GANSU PROVINCE ; EGGSHELL ; EVOLUTION ; GROWTH ; BIRDS ; ORNITHOTHORACES ; PRESERVATION ; REVEALS
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]
WOS研究方向Science & Technology - Other Topics
语种英语
WOS记录号WOS:000461757600004
出版者NATURE PUBLISHING GROUP
资助机构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
源URL[http://119.78.100.205/handle/311034/9467]  
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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来源：古脊椎动物与古人类研究所

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