Medullary bone in an Early Cretaceous enantiornithine bird and discussion regarding its identification in fossils

doi:10.1038/s41467-018-07621-z

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	Medullary bone in an Early Cretaceous enantiornithine bird and discussion regarding its identification in fossils
	O'Connor, Jingmai1,2 ; Erickson, Gregory M.3; Norell, Mark 4; Bailleul, Alida M.1,2; Hu, Han 5; Zhou, Zhonghe1,2
	2018-12-05
发表期刊	NATURE COMMUNICATIONS
ISSN	2041-1723
卷号	9 期号:5169 页码:8
摘要	Medullary bone is an ephemeral type of bone tissue, today found only in sexually mature female birds, that provides a calcium reservoir for eggshell formation. The presence of medullary bone-like tissues in extant birds, pterosaurs, and dinosaurs distantly related to birds shows that caution must be exercised before concluding that fossils bear medullary bone. Here we describe a new specimen of pengornithid enantiornithine from the Lower Cretaceous Jiufotang Formation. Consisting of an isolated left hindlimb, the three-dimensional preservation contrasts with the crushed preservation characteristic of most Jehol specimens. Histological examinations suggest this resulted from the presence of a thick layer of highly vascular bone spanning the medullary cavities of the femur and tibiotarsus, consistent with expectations for medullary bone in extant birds. Micro-computed tomographic scans reveal small amounts of the same tissue extending into the pedal phalanges. We consider the tissue to be homologous to the medullary bone of Neornithines.
DOI	10.1038/s41467-018-07621-z
关键词[WOS]	SEXUAL-MATURITY ; HISTOLOGY ; EVOLUTION ; CALCIFICATION ; DINOSAURS ; REVEALS ; TISSUES
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[41688103] ; NSF[EAR 0207744]
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000452196200002
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/311034/9172
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	O'Connor, Jingmai
作者单位	1.Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origins, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 2.CAS Ctr Excellence Life & Paleoenvironm, Beijing 10010, Peoples R China 3.Florida State Univ, Dept Biol Sci, B-157, Tallahassee, FL 32306 USA 4.Amer Museum Nat Hist, Div Paleontol, New York, NY 10024 USA 5.Univ New England, Zool, Armidale, NSW 2351, Australia
推荐引用方式 GB/T 7714	O'Connor, Jingmai,Erickson, Gregory M.,Norell, Mark,et al. Medullary bone in an Early Cretaceous enantiornithine bird and discussion regarding its identification in fossils[J]. NATURE COMMUNICATIONS,2018,9(5169):8.
APA	O'Connor, Jingmai,Erickson, Gregory M.,Norell, Mark,Bailleul, Alida M.,Hu, Han,&Zhou, Zhonghe.(2018).Medullary bone in an Early Cretaceous enantiornithine bird and discussion regarding its identification in fossils.NATURE COMMUNICATIONS,9(5169),8.
MLA	O'Connor, Jingmai,et al."Medullary bone in an Early Cretaceous enantiornithine bird and discussion regarding its identification in fossils".NATURE COMMUNICATIONS 9.5169(2018):8.

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