Ordovician opabiniid-like animals and the role of the proboscis in euarthropod head evolution

doi:10.1038/s41467-022-34204-w

	Ordovician opabiniid-like animals and the role of the proboscis in euarthropod head evolution
	Pates, Stephen 5; Botting, Joseph P.3,4; Muir, Lucy A.3; Wolfe, Joanna M.1,2
刊名	NATURE COMMUNICATIONS
	2022-11-15
卷号	13 期号:1 页码:15
DOI	10.1038/s41467-022-34204-w
通讯作者	Pates, Stephen(sp587@cam.ac.uk)
英文摘要	A crucial step in the evolution of Euarthropoda (chelicerates, myriapods, pancrustaceans) was the transition between fossil groups that possessed frontal appendages innervated by the first segment of the brain (protocerebrum), and living groups with a protocerebral labrum and paired appendages innervated by the second brain segment (deutocerebrum). Appendage homologies between the groups are controversial. Here we describe two specimens of opabiniid-like euarthropods, each bearing an anterior proboscis (a fused protocerebral appendage), from the Middle Ordovician Castle Bank Biota, Wales, UK. Phylogenetic analyses support a paraphyletic grade of stem-group euarthropods with fused protocerebral appendages and a posterior-facing mouth, as in the iconic Cambrian panarthropod Opabinia. These results suggest that the labrum may have reduced from an already-fused proboscis, rather than a pair of arthropodized appendages. If some shared features between the Castle Bank specimens and radiodonts are considered convergent rather than homologous, phylogenetic analyses retrieve them as opabiniids, substantially extending the geographic and temporal range of Opabiniidae. Here, the authors describe two opabiniid-like euarthropods with anterior proboscises from the Middle Ordovician Castle Bank Biota, Wales, UK. Phylogenetic analysis suggests that these specimens may be sister to radiodonts and deuteropods.
资助项目	University of Cambridge Herchel Smith Postdoctoral Fellowship ; Chinese Academy of Sciences PIFI fellowships[2020VCB0014] ; Chinese Academy of Sciences PIFI fellowships[2018VCB0014] ; National Science Foundation[1856679]
WOS关键词	BURGESS SHALE ; FOSSIL RECORD ; ANOMALOCARIS ; BRAIN ; APPENDAGES ; MORPHOLOGY ; REGALIS ; LABRUM
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	NATURE PORTFOLIO
WOS记录号	WOS:000884426700006
资助机构	University of Cambridge Herchel Smith Postdoctoral Fellowship ; Chinese Academy of Sciences PIFI fellowships ; National Science Foundation
内容类型	期刊论文
源URL	[http://ir.nigpas.ac.cn/handle/332004/41481]
专题	中国科学院南京地质古生物研究所
通讯作者	Pates, Stephen
作者单位	1.Harvard Univ, Dept Organism & Evolutionary Biol, Cambridge, MA 02138 USA 2.Harvard Univ, Museum Comparat Zool, Cambridge, MA 02138 USA 3.Amgueddfa Cymru Natl Museum Wales, Dept Nat Sci, Cardiff, Wales 4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjing, Peoples R China 5.Univ Cambridge, Dept Zool, Cambridge, England
推荐引用方式 GB/T 7714	Pates, Stephen,Botting, Joseph P.,Muir, Lucy A.,et al. Ordovician opabiniid-like animals and the role of the proboscis in euarthropod head evolution[J]. NATURE COMMUNICATIONS,2022,13(1):15.
APA	Pates, Stephen,Botting, Joseph P.,Muir, Lucy A.,&Wolfe, Joanna M..(2022).Ordovician opabiniid-like animals and the role of the proboscis in euarthropod head evolution.NATURE COMMUNICATIONS,13(1),15.
MLA	Pates, Stephen,et al."Ordovician opabiniid-like animals and the role of the proboscis in euarthropod head evolution".NATURE COMMUNICATIONS 13.1(2022):15.