New data on the headshield of Parayunnanolepis xitunensis (Placodermi, Antiarcha), with comments on nasal capsules in antiarchs

doi:10.1080/02724634.2020.1855189

IVPP-IR > 中科院古脊椎所（2000年以后）

	New data on the headshield of Parayunnanolepis xitunensis (Placodermi, Antiarcha), with comments on nasal capsules in antiarchs
	Wang, Yajing 1; Zhu, Min1,2,3
	2021-02-18
发表期刊	JOURNAL OF VERTEBRATE PALEONTOLOGY
ISSN	0272-4634
卷号	40 期号:6 页码:1-8
摘要	The diversity in positions of nasal capsules has been well documented in various subgroups of placoderms or jawed stem gnathostomes. However, the condition in primitive antiarchs (i.e., the Yunnanolepidoidei) remains unclear, and the positional shift of nasal capsules in the Antiarcha has never been mentioned. Here we re-describe the headshield of Parayunnanolepis xitunensis, a yunnanolepidoid antiarch from the Lower Devonian of China, using X-ray computed tomography scanning. The study provides new anatomical details of the headshield including the sclerotic capsules, the visceral side of the rostral and pineal plates, and the dorsal profile of the endocranium. Parayunnanolepis xitunensis bears a pair of nasal capsules underlying the rostral plate between the eyes, resembling Romundina but differing from most euantiarchs, whose nasal capsules are encased in the preorbital recess in front of the eyes. A phylogenetic analysis based on a modified matrix indicates a stepwise forward migration of nasal capsules within antiarchs, accompanied by the innovation of the preorbital recess and the loss of the preorbital depression.
DOI	10.1080/02724634.2020.1855189
收录类别	SCI
语种	英语
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences[XDA19050102] ; National Natural Science Foundation of China[41530102] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB26000000] ; Key Research Program of Frontier Sciences, CAS[QYZDJ-SSW-DQC002]
WOS研究方向	Paleontology
WOS类目	Paleontology
WOS记录号	WOS:000619753000001
出版者	TAYLOR & FRANCIS INC
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/18688
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 210023, Peoples R China 2.Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origins, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 3.CAS Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yajing,Zhu, Min. New data on the headshield of Parayunnanolepis xitunensis (Placodermi, Antiarcha), with comments on nasal capsules in antiarchs[J]. JOURNAL OF VERTEBRATE PALEONTOLOGY,2021,40(6):1-8.
APA	Wang, Yajing,&Zhu, Min.(2021).New data on the headshield of Parayunnanolepis xitunensis (Placodermi, Antiarcha), with comments on nasal capsules in antiarchs.JOURNAL OF VERTEBRATE PALEONTOLOGY,40(6),1-8.
MLA	Wang, Yajing,et al."New data on the headshield of Parayunnanolepis xitunensis (Placodermi, Antiarcha), with comments on nasal capsules in antiarchs".JOURNAL OF VERTEBRATE PALEONTOLOGY 40.6(2021):1-8.

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