Squamation and scale morphology at the root of jawed vertebrates

doi:10.7554/eLife.76661

IVPP-IR > 中科院古脊椎所（2000年以后）

	Squamation and scale morphology at the root of jawed vertebrates
	Wang, Yajing 1; Zhu, Min1,2,3
	2022-06-08
发表期刊	ELIFE
ISSN	2050-084X
卷号	11 期号:e76661 页码:20
摘要	Placoderms, as the earliest branching jawed vertebrates, are crucial to understanding how the characters of crown gnathostomes comprising Chondrichthyes and Osteichthyes evolved from their stem relatives. Despite the growing knowledge of the anatomy and diversity of placoderms over the past decade, the dermal scales of placoderms are predominantly known from isolated material, either morphologically or histologically, resulting in their squamation being poorly understood. Here we provide a comprehensive description of the squamation and scale morphology of a primitive taxon of Antiarcha (a clade at the root of jawed vertebrates), Parayunnanolepis xitunensis, based on the virtual restoration of an articulated specimen by using X-ray computed tomography. Thirteen morphotypes of scales are classified to exhibit how the morphology changes with their position on the body in primitive antiarchs, based on which nine areas of the post-thoracic body are distinguished to show their scale variations in the dorsal, flank, ventral, and caudal lobe regions. In this study, the histological structure of yunnanolepidoid scales is described for the first time based on disarticulated scales from the type locality and horizon of P. xitunensis. The results demonstrate that yunnanolepidoid scales are remarkably different from their dermal plates as well as euantiarch scales in lack of a well-developed middle layer. Together, our study reveals that the high regionalization of squamation and the bipartite histological structure of scales might be plesiomorphic for antiarchs, and jawed vertebrates in general.
关键词	jawed vertebrates placoderms squamation morphology scale histology Devonian Other
DOI	10.7554/eLife.76661
关键词[WOS]	DEVONIAN GOGO FORMATION ; PLACODERM SCALES ; DERMAL SKELETON ; EARLY EVOLUTION ; ORIGIN ; HISTOLOGY ; FISH ; INTERRELATIONSHIPS ; ANTIARCHI ; VICTORIA
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[42130209] ; National Natural Science Foundation of China[42130209] ; Strategic Priority Research Program of the Chinese of Sciences[XDA19050102] ; Strategic Priority Research Program of the Chinese of Sciences[XDA19050102] ; Strategic Priority Research Program of the Chinese of Sciences[XDB26000000] ; Strategic Priority Research Program of the Chinese of Sciences[XDB26000000]
WOS研究方向	Life Sciences & Biomedicine - Other Topics
WOS类目	Biology
WOS记录号	WOS:000808502200001
出版者	eLIFE SCIENCES PUBL LTD
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/21648
专题	中科院古脊椎所（2000年以后）
通讯作者	Zhu, Min
作者单位	1.Nanjing Univ, Sch Earth Sci & Engn, Nanjing, Peoples R China 2.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Human Origins Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China 3.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yajing,Zhu, Min. Squamation and scale morphology at the root of jawed vertebrates[J]. ELIFE,2022,11(e76661):20.
APA	Wang, Yajing,&Zhu, Min.(2022).Squamation and scale morphology at the root of jawed vertebrates.ELIFE,11(e76661),20.
MLA	Wang, Yajing,et al."Squamation and scale morphology at the root of jawed vertebrates".ELIFE 11.e76661(2022):20.

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