Heterochronic truncation of odontogenesis in theropod dinosaurs provides insight into the macroevolution of avian beaks

doi:10.1073/pnas.1708023114

IVPP-IR > 中科院古脊椎所（2000年以后）

	Heterochronic truncation of odontogenesis in theropod dinosaurs provides insight into the macroevolution of avian beaks
	Wang, Shuo 1,2; Stiegler, Josef 3; Wu, Ping 4; Chuong, Cheng-Ming 4; Hu, Dongyu 5; Balanoff, Amy 6; Zhou, Yachun 7,8; Xu, Xing 7
	2017-10-10
发表期刊	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷号	114 期号:41 页码:10930-10935
文章类型	Article
摘要	Beaks are innovative structures characterizing numerous tetrapod lineages, including birds, but little is known about how developmental processes influenced the macroevolution of these important structures. Here we provide evidence of ontogenetic vestigialization of alveoli in two lineages of theropod dinosaurs and show that these are transitional phenotypes in the evolution of beaks. One of the smallest known caenagnathid oviraptorosaurs and a small specimen of the Early Cretaceous bird Sapeornis both possess shallow, empty vestiges of dentary alveoli. In both individuals, the system of vestiges connects via foramina with a dorsally closed canal homologous to alveoli. Similar morphologies are present in Limusaurus, a beaked theropod that becomes edentulous during ontogeny; and an analysis of neontological and paleontological evidence shows that ontogenetic reduction of the dentition is a relatively common phenomenon in vertebrate evolution. Based on these lines of evidence, we propose that progressively earlier postnatal and embryonic truncation of odontogenesis corresponds with expansion of rostral keratin associated with the caruncle, and these progenesis and peramorphosis heterochronies combine to drive the evolution of edentulous beaks in nonavian theropods and birds. Following initial apomorphic expansion of rostral keratinized epithelia in perinatal toothed theropods, beaks appear to inhibit odontogenesis as they grow postnatally, resulting in a sequence of common morphologies. This sequence is shifted earlier in development through phylogeny until dentition is absent at hatching, and odontogenesis is inhibited by beak formation in ovo.
关键词	Ontogenetic Edentulism Beak Evolution Tooth Reduction Caenagnathidae Sapeornis
WOS标题词	Science & Technology
DOI	10.1073/pnas.1708023114
关键词[WOS]	ALLIGATOR-MISSISSIPPIENSIS ; EVOLUTION ; TEETH ; OVIRAPTOROSAURIA ; MORPHOLOGY ; DENTITION ; CHINA ; ACIPENSERIFORMES ; TOOTHLESSNESS ; CHARACTERS
收录类别	SCI
语种	英语
项目资助者	National Natural Science Foundation of China(41602013 ; Youth Innovative Research Team Project of Capital Normal University ; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences(173125) ; U.S. National Science Foundation(NSF EAR 0310217 ; National Institutes of Health(AR47364 ; National Science Foundation(NSF DEB 1457181) ; 41688103 ; 0228559) ; AR60306) ; 41120124002 ; 41172026)
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000412653900059
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/8033
专题	中科院古脊椎所（2000年以后）
作者单位	1.Capital Normal Univ, Coll Life Sci, Lab Vertebrate Evolut, Beijing 100048, Peoples R China 2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China 3.George Washington Univ, Dept Biol Sci, Washington, DC 20052 USA 4.Univ Southern Calif, Keck Sch Med, Dept Pathol, Los Angeles, CA 90033 USA 5.Shenyang Normal Univ, Key Lab Evolut Life Northeast Asia, Paleontol Museum Liaoning, Minist Land & Resources,Paleontol Inst, Shenyang 110034, Liaoning, Peoples R China 6.Johns Hopkins Univ, Ctr Funct Anat & Evolut, Baltimore, MD 21205 USA 7.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origin, Beijing 100044, Peoples R China 8.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Shuo,Stiegler, Josef,Wu, Ping,et al. Heterochronic truncation of odontogenesis in theropod dinosaurs provides insight into the macroevolution of avian beaks[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2017,114(41):10930-10935.
APA	Wang, Shuo.,Stiegler, Josef.,Wu, Ping.,Chuong, Cheng-Ming.,Hu, Dongyu.,...&Xu, Xing.(2017).Heterochronic truncation of odontogenesis in theropod dinosaurs provides insight into the macroevolution of avian beaks.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,114(41),10930-10935.
MLA	Wang, Shuo,et al."Heterochronic truncation of odontogenesis in theropod dinosaurs provides insight into the macroevolution of avian beaks".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 114.41(2017):10930-10935.

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