A new genus of sinogaleaspids (Galeaspida, stem-Gnathostomata) from the Silurian Period in Jiangxi, China

doi:10.7717/peerj.9008

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	A new genus of sinogaleaspids (Galeaspida, stem-Gnathostomata) from the Silurian Period in Jiangxi, China
	Shan, Xianren 2,3; Zhu, Min 1,2,4; Zhao, Wenjin 1,2,4; Pan, Zhaohui 2; Wang, Pingli 3; Gai, Zhikun 1,2,4
刊名	PEERJ
	2020-05-15
卷号	8 期号:0 页码:22
关键词	New genus Galeaspida Eugaleaspids Phylogeny Silurian
ISSN号	2167-8359
DOI	10.7717/peerj.9008
英文摘要	Galeaspids are an endemic clade of jawless stem-gnathostomes known as ostracoderms. Their existence illuminates how specific characteristics developed in jawed vertebrates. Sinogaleaspids are of particular interest among the galeaspids but their monophyly is controversial because little is known about Sinogaleaspis xikengensis. Newly discovered sinogaleaspids from the Lower Silurian of Jiangxi, China provide a wealth of data and diagnostic features used to establish the new genus, Rumporostralis gen. nov., for Sinogaleaspis xikengensis. A morphological study showed that the sensory canal system of sinogaleaspids had mosaic features similar to those of three known galeaspids. There are 3-8 pairs of transverse canals in the Sinogaleaspidae, which suggests that the sensory canal system of galeaspid probably had a grid distribution with transverse canals arranged throughout the cephalic division. Phylogenetic analysis of Galeaspida supports the monophyly of the Sinogaleaspidae, consisting of Sinogaleaspis, Rumporostralis, and Anjiaspis. However, Shuyu and Meishanaspis form another monophyletic group, Shuyuidae fam. nov., which is outside all other eugaleaspidiforms. We propose a cladistically-based classification of Galeaspida based on our analysis.
资助项目	Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-DQC040] ; National Program for support of Top-notch Young Professionals ; Strategic Priority Research Program of CAS[XDB26000000] ; National Nature Science Foundation of China[41572108] ; National Nature Science Foundation of China[41530102] ; National Nature Science Foundation of China[41972006] ; Innovation Training Programs for Undergraduates, CAS ; State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS)[193121]
WOS关键词	LINE SYSTEM ; AGNATHA ; OSTEOSTRACI ; VERTEBRATE ; AFFINITY ; GROWTH
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	PEERJ INC
WOS记录号	WOS:000533154200002
内容类型	期刊论文
源URL	[http://119.78.100.205/handle/311034/17491]
专题	古脊椎动物与古人类研究所_图书馆1
通讯作者	Gai, Zhikun
作者单位	1.CAS Ctr Excellence Life & Paleoenvironm, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China 3.Shandong Univ Sci & Technol, Coll Earth Sci & Engn, Qingdao, Peoples R China 4.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Shan, Xianren,Zhu, Min,Zhao, Wenjin,et al. A new genus of sinogaleaspids (Galeaspida, stem-Gnathostomata) from the Silurian Period in Jiangxi, China[J]. PEERJ,2020,8(0):22.
APA	Shan, Xianren,Zhu, Min,Zhao, Wenjin,Pan, Zhaohui,Wang, Pingli,&Gai, Zhikun.(2020).A new genus of sinogaleaspids (Galeaspida, stem-Gnathostomata) from the Silurian Period in Jiangxi, China.PEERJ,8(0),22.
MLA	Shan, Xianren,et al."A new genus of sinogaleaspids (Galeaspida, stem-Gnathostomata) from the Silurian Period in Jiangxi, China".PEERJ 8.0(2020):22.