A new Silurian fish close to the common ancestor of modern gnathostomes

doi:10.1016/j.cub.2021.05.053

IVPP-IR > 中科院古脊椎所（2000年以后）

	A new Silurian fish close to the common ancestor of modern gnathostomes
	Li, Qiang1,2,3,4 ; Zhu, You-an 2,5; Lu, Jing 2,5,6; Chen, Yang 1,3; Wang, Jianhua 4; Peng, Lijian 4; Wei, Guangbiao 7; Zhu, Min2,5,6
	2021-08-23
发表期刊	CURRENT BIOLOGY
ISSN	0960-9822
卷号	31 期号:16 页码:3613-+
摘要	The Silurian Period occupies a pivotal stage in the unfolding of key evolutionary events, including the rise of jawed vertebrates.(1-4) However, the understanding of this early diversification is often hampered by the patchy nature of the Silurian fossil record,(5) with the articulated specimens of jawed vertebrates only known in isolated localities, most notably Qujing, Yunnan, China.(6-9) Here, we report a new Silurian maxillate placoderm, Bianchengichthys micros, from the Ludlow of Chongqing, with a near-complete dermatoskeleton preserved in articulation. Although geographically separated, the new taxon resembles the previously reported Qilinyu in possessing a unique combination of dermatoskeletal characters. However, the dermal bone of the mandible in Bianchengichthys unexpectedly differs from those in both Qilinyu and Entelognathus and displays a broad oral lamina carrying a line of tooth-like denticles, in addition to the marginal toothless flange. The external morphology of the pectoral fin is preserved and reveals an extensively scale-covered lobate part, flanked by a fringe of lepidotrichia-like aligned scales. The phylogenetic analysis reveals that Bianchengichthys is positioned immediately below Entelognathus plus modern gnathostomes. The discovery significantly widens the distribution of Silurian placoderm-grade gnathostomes in South China and provides a range of morphological disparity for the outgroup comparison to the earliest evolution of jaws, dentitions, and pectoral fins in modem gnathostomes. We also demonstrate that the previously reported Silurian placoderms from central Vietnam l degrees are maxillate placoderms close to Qilinyu, Silurolepis, and Bianchengichthys, corroborating the paleogeographic proximity between the Indochina and South China blocks during the Middle Paleozoic.(11)
DOI	10.1016/j.cub.2021.05.053
关键词[WOS]	PHARYNGEAL DENTICLES ; TEETH ; PLACODERM ; EVOLUTION ; CHINA ; ORIGIN ; JAWS
收录类别	SCI
语种	英语
资助项目	Strategic Priority Research Program of Chinese Academy of Sciences[XDB26000000] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA19050102] ; National Natural Science Foundation of China[41872023] ; Chinese Academy Sciences[E0CQ010103] ; National Science Fund for Excellent Young Scholars[42022011] ; Key Research Program of Fron-tier Sciences, CAS[QYZDJ-SSW-DQC002] ; Chinese Postdoctoral Science Foundation[2019M663440]
WOS研究方向	Biochemistry & Molecular Biology ; Life Sciences & Biomedicine - Other Topics ; Cell Biology
WOS类目	Biochemistry & Molecular Biology ; Biology ; Cell Biology
WOS记录号	WOS:000687948600014
出版者	CELL PRESS
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/18971
专题	中科院古脊椎所（2000年以后）
通讯作者	Zhu, You-an; Zhu, Min
作者单位	1.Chongqing Key Lab Exogen Mineralizat & Mine Envir, Chongqing 401120, Peoples R China 2.Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origins, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 3.Chongqing Inst Geol & Mineral Resources, Chongqing 401120, Peoples R China 4.Qujing Normal Univ, Qujing 655000, Yunnan, Peoples R China 5.CAS Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China 6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 7.Chongqing Inst Geol Survey, Chongqing 401122, Peoples R China
推荐引用方式 GB/T 7714	Li, Qiang,Zhu, You-an,Lu, Jing,et al. A new Silurian fish close to the common ancestor of modern gnathostomes[J]. CURRENT BIOLOGY,2021,31(16):3613-+.
APA	Li, Qiang.,Zhu, You-an.,Lu, Jing.,Chen, Yang.,Wang, Jianhua.,...&Zhu, Min.(2021).A new Silurian fish close to the common ancestor of modern gnathostomes.CURRENT BIOLOGY,31(16),3613-+.
MLA	Li, Qiang,et al."A new Silurian fish close to the common ancestor of modern gnathostomes".CURRENT BIOLOGY 31.16(2021):3613-+.

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