Fossil jawless fish from China foreshadows early jawed vertebrate anatomy

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	Fossil jawless fish from China foreshadows early jawed vertebrate anatomy
	Gai, Zhikun 1,2; Donoghue, Philip C. J.1; Zhu, Min 2; Janvier, Philippe 3; Stampanoni, Marco 4,5; phil.donoghue@bristol.ac.uk
	2011-08-18
发表期刊	NATURE
ISSN	0028-0836
卷号	476 期号:7360 页码:324-327
文章类型	Article
摘要	Most living vertebrates are jawed vertebrates (gnathostomes), and the living jawless vertebrates (cyclostomes), hagfishes and lampreys, provide scarce information about the profound reorganization of the vertebrate skull during the evolutionary origin of jaws(1-9). The extinct bony jawless vertebrates, or 'ostracoderms', are regarded as precursors of jawed vertebrates and provide insight into this formative episode in vertebrate evolution(8-14). Here, using synchrotron radiation X-ray tomography(15,16), we describe the cranial anatomy of galeaspids, a 435-370-million-year-old 'ostracoderm' group from China and Vietnam(17). The paired nasal sacs of galeaspids are located anterolaterally in the braincase, and the hypophyseal duct opens anteriorly towards the oral cavity. These three structures (the paired nasal sacs and the hypophyseal duct) were thus already independent of each other, like in gnathostomes and unlike in cyclostomes and osteostracans (another 'ostracoderm' group), and therefore have the condition that current developmental models regard as prerequisites for the development of jaws(1-3). This indicates that the reorganization of vertebrate cranial anatomy was not driven deterministically by the evolutionary origin of jaws but occurred stepwise, ultimately allowing the rostral growth of ectomesenchyme that now characterizes gnathostome head development(1-3).
关键词	Tomographic Microscopy Internal Anatomy Neural Crest Origin Evolution Agnathans Phylogeny Lamprey Head
WOS标题词	Science & Technology
URL	查看原文
关键词[WOS]	TOMOGRAPHIC MICROSCOPY ; INTERNAL ANATOMY ; NEURAL CREST ; ORIGIN ; EVOLUTION ; AGNATHANS ; PHYLOGENY ; LAMPREY ; HEAD
收录类别	SCI
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000294206500036
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/4397
专题	中科院古脊椎所（2000年以后）
通讯作者	phil.donoghue@bristol.ac.uk
作者单位	1.Univ Bristol, Sch Earth Sci, Bristol BS8 1RJ, Avon, England 2.Chinese Acad Sci, Lab Evolutionary Systemat Vertebrates, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 3.Museum Natl Hist Nat, CNRS, UMR 7207, F-75231 Paris 05, France 4.Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland 5.Univ & ETH Zurich, Inst Biomed Engn, CH-8092 Zurich, Switzerland
推荐引用方式 GB/T 7714	Gai, Zhikun,Donoghue, Philip C. J.,Zhu, Min,et al. Fossil jawless fish from China foreshadows early jawed vertebrate anatomy[J]. NATURE,2011,476(7360):324-327.
APA	Gai, Zhikun,Donoghue, Philip C. J.,Zhu, Min,Janvier, Philippe,Stampanoni, Marco,&phil.donoghue@bristol.ac.uk.(2011).Fossil jawless fish from China foreshadows early jawed vertebrate anatomy.NATURE,476(7360),324-327.
MLA	Gai, Zhikun,et al."Fossil jawless fish from China foreshadows early jawed vertebrate anatomy".NATURE 476.7360(2011):324-327.

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