Redescription of the Sanqiaspidae (Galeaspida) from the Lower Devonian of South China and its biostratigraphic significance

doi:10.1007/s12549-021-00486-z

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	Redescription of the Sanqiaspidae (Galeaspida) from the Lower Devonian of South China and its biostratigraphic significance
	Gai, Zhi-Kun 3,4,5; Jiang, Wen-Yu 2,5; Zhao, Wen-Jin 3,4,5; Li, Qiang 1,5; Shi, Xiao-Dong 1; Zhu, Min 3,4,5
刊名	PALAEOBIODIVERSITY AND PALAEOENVIRONMENTS
	2021-05-26
期号	0 页码:https://doi.org/10.1007/s12549-021-00486-z
关键词	Galeaspida Lower Devonian Taxonomy Biostratigraphy South China
ISSN号	1867-1594
DOI	10.1007/s12549-021-00486-z
英文摘要	Galeaspida is an endemic clade of jawless stem-gnathostomes ('ostracoderms'), known exclusively from the Silurian and Devonian of China and Vietnam. Among galeaspids, the family Sanqiaspidae is of particular interest for providing the first information on the galeaspid trunk and caudal fin; however, the cranial morphology of sanqiaspids remains poorly known. Here we report the first occurrence of Sanqiaspis in the Xujiachong Formation of Qujing, East Yunnan, and describe new material of Sanqiaspis from two other sites in South China. The new data corroborate the presence of the two median transverse canals in Sanqiaspis as a possible synapomorphy of the Sanqiaspidae. As a key member of the Xujiachong Assemblage, Sanqiaspis is known from the Xujiachong, Guanshanpo, Posongchong, and Si Ka formations. Stratigraphic correlation of eight Early Devonian sections in South China and North Vietnam indicates that the Sanqiaspis-bearing layers can be correlated with the transitional beds between the Lianhuashan and Nahkaoling formations in Liujing, Guangxi. Therefore, the middle-upper part of the Si Ka Formation in northern Vietnam and the upper part of the Lianhuashan Formation in Guangxi should be dated as Pragian, rather than Lochkovian. The fish assemblage from the Pragian of the South China Block documents the diversification of galeaspids, notably Huananaspidiformes, and exhibits much the same endemic pattern as that of early vascular plants and brachiopods. This endemism might be linked with the semi-closed epicontinental nature of the South China Sea during the Early Devonian, which formed a biodiversity hotspot as in the modern Red Sea.
资助项目	Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-DQC040] ; Strategic Priority Research Program of CAS[XDA19050102] ; Strategic Priority Research Program of CAS[XDB26000000] ; National Natural Science Foundation of China[41530102] ; Innovation Training Programs for Undergraduates, CAS ; National Natural Science Foundation of China[41972006] ; National Program for support of Topnotch Young Professionals
WOS关键词	XUJIACHONG FORMATION ; SP-NOV ; YUNNAN ; ARTHRODIRA ; GUANGXI ; BRACHIOPODS ; PLACODERMI ; EVOLUTION ; AGNATHA ; SYSTEM
WOS研究方向	Biodiversity & Conservation ; Paleontology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000654104500001
内容类型	期刊论文
源URL	[http://119.78.100.205/handle/311034/18290]
专题	古脊椎动物与古人类研究所_图书馆1
通讯作者	Zhu, Min
作者单位	1.Qujing Normal Univ, Res Ctr Nat Hist & Culture, Qujing 655000, Yunnan, Peoples R China 2.Shandong Univ Sci & Technol, Coll Earth Sci & Engn, Qingdao 266590, Shandong, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.CAS Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China 5.Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China
推荐引用方式 GB/T 7714	Gai, Zhi-Kun,Jiang, Wen-Yu,Zhao, Wen-Jin,et al. Redescription of the Sanqiaspidae (Galeaspida) from the Lower Devonian of South China and its biostratigraphic significance[J]. PALAEOBIODIVERSITY AND PALAEOENVIRONMENTS,2021(0):https://doi.org/10.1007/s12549-021-00486-z.
APA	Gai, Zhi-Kun,Jiang, Wen-Yu,Zhao, Wen-Jin,Li, Qiang,Shi, Xiao-Dong,&Zhu, Min.(2021).Redescription of the Sanqiaspidae (Galeaspida) from the Lower Devonian of South China and its biostratigraphic significance.PALAEOBIODIVERSITY AND PALAEOENVIRONMENTS(0),https://doi.org/10.1007/s12549-021-00486-z.
MLA	Gai, Zhi-Kun,et al."Redescription of the Sanqiaspidae (Galeaspida) from the Lower Devonian of South China and its biostratigraphic significance".PALAEOBIODIVERSITY AND PALAEOENVIRONMENTS .0(2021):https://doi.org/10.1007/s12549-021-00486-z.