Insight into the growth pattern and bone fusion of basal birds from an Early Cretaceous enantiornithine bird

doi:10.1073/pnas.1707237114

IVPP-IR > 中科院古脊椎所（2000年以后）

	Insight into the growth pattern and bone fusion of basal birds from an Early Cretaceous enantiornithine bird
	Wang, Min; Li, Zhiheng; Zhou, Zhonghe
	2017-10-24
发表期刊	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷号	114 期号:43 页码:11470-11475
文章类型	Article
摘要	Bird skeletons exhibit remarkable modifications that allow for flight. The most distinguishable features are the fusion of the bones in the hand, feet, and pelvis into composite rigid and bony structures. However, the historical origins of these avian bone fusions remain elusive because of the rarity of transitional fossils and developmental studies on modern birds. Here, we describe an Early Cretaceous bird (120 Mya) that has fully fused alular-major metacarpals and pelvis. We discuss the manus and pelvis fusions across Paravian phylogeny and demonstrate that these features evolved independently across nonavian theropods, Enantiornithes, and Ornithuromorpha. The fusions of these bones are rare in known nonavian theropods and Early Cretaceous birds but are well established among Late Cretaceous and modern birds, revealing a complicated evolution pattern unrecognized previously. We posit that the developments of bone fusion were polymorphic close to the origin of birds, resulting in the varying degrees of fusion in Paraves. However, that development polymorphism appears to be fundamentally restricted along the line to modern birds by the Late Cretaceous, where all birds have a completely fused manus and pelvis. Such changes likely correspond to a refinement of flight capability. Alternatively, the degree of bone fusion in this primitive bird may have been related to modifications in genes or developmental paths. Future studies and fossil discoveries are required to clarify these hypotheses and pinpoint the developmental pathways involving the bone fusions in early avian evolution through to their modern pattern.
关键词	Bone Fusion Bird Cretaceous Histology Development
WOS标题词	Science & Technology
DOI	10.1073/pnas.1707237114
关键词[WOS]	DEVELOPMENTAL PLASTICITY ; EARLY EVOLUTION ; JEHOL BIOTA ; AVES ; CHINA ; ORIGIN ; PHYLOGENY ; THEROPODA ; DINOSAUR ; SKELETON
收录类别	SCI
语种	英语
项目资助者	National Natural Science Foundation of China(41502002 ; 41688103)
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000413520700068
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/8040
专题	中科院古脊椎所（2000年以后）
作者单位	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	Wang, Min,Li, Zhiheng,Zhou, Zhonghe. Insight into the growth pattern and bone fusion of basal birds from an Early Cretaceous enantiornithine bird[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2017,114(43):11470-11475.
APA	Wang, Min,Li, Zhiheng,&Zhou, Zhonghe.(2017).Insight into the growth pattern and bone fusion of basal birds from an Early Cretaceous enantiornithine bird.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,114(43),11470-11475.
MLA	Wang, Min,et al."Insight into the growth pattern and bone fusion of basal birds from an Early Cretaceous enantiornithine bird".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 114.43(2017):11470-11475.

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