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Cambrian stem-group ambulacrarians and the nature of the ancestral deuterostome

文献类型：期刊论文

作者Li, Yujing1,2,3,4; Dunn, Frances S.5; Murdock, Duncan J. E.5; Guo, Jin2,3,6; Rahman, Imran A.5,7; Cong, Peiyun2,3
刊名CURRENT BIOLOGY
出版日期2023-06-19
卷号33期号:12页码:2359-+
ISSN号0960-9822
DOI10.1016/j.cub.2023.04.048
通讯作者Rahman, Imran A.(imran.rahman@nhm.ac.uk) ; Cong, Peiyun(cong@ynu.edu.cn)
英文摘要Deuterostomes are characterized by some of the most widely divergent body plans in the animal kingdom. These striking morphological differences have hindered efforts to predict ancestral characters, with the origin and earliest evolution of the group remaining ambiguous. Several iconic Cambrian fossils have been suggested to be early deuterostomes and hence could help elucidate ancestral character states. However, their phylogenetic relationships are controversial. Here, we describe new, exceptionally preserved specimens of the discoidal metazoan Rotadiscus grandis from the early Cambrian Chengjiang biota of China. These reveal a previously unknown double spiral structure, which we interpret as a chordate-like covering to a coelomopore, located adjacent to a horseshoe-shaped tentacle complex. The tentacles differ in key aspects from those seen in lophophorates and are instead more similar to the tentacular systems of extant pterobranchs and echinoderms. Thus, Rotadiscus exhibits a chimeric combination of ambulacrarian and chordate characters. Phylogenetic analyses recover Rotadiscus and closely related fossil taxa as stem ambulacrarians, filling a significant morphological gap in the deuterostome tree of life. These results allow us to reconstruct the ancestral body plans of major clades of deuterostomes, revealing that key traits of extant forms, such as a post-anal region, gill bars, and a U-shaped gut, evolved through convergence.
WOS关键词SACCOGLOSSUS-KOWALEVSKII ; NERVOUS-SYSTEM ; EVOLUTION ; CHORDATE ; LAGERSTATTE ; PHYLOGENY ; EXPRESSION ; INSIGHTS ; ORIGINS ; FOSSILS
资助项目National Natural Science Foundation of China[42072019] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB26000000] ; State Key Labora-tory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS[213111] ; Yunling Scholar Program and a joint project of YNU-Yunnan Government[202201BF070001-016] ; Merton College ; Royal Commission
WOS研究方向Biochemistry & Molecular Biology ; Life Sciences & Biomedicine - Other Topics ; Cell Biology
语种英语
出版者CELL PRESS
WOS记录号WOS:001025889100001
资助机构National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; State Key Labora-tory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS ; Yunling Scholar Program and a joint project of YNU-Yunnan Government ; Merton College ; Royal Commission
源URL[http://ir.nigpas.ac.cn/handle/332004/42527]  
专题中国科学院南京地质古生物研究所
通讯作者Rahman, Imran A.; Cong, Peiyun
作者单位1.Yunnan Normal Univ, Kunming 650500, Peoples R China
2.Yunnan Univ, Inst Palaeontol, Yunnan Key Lab Palaeobiol, Kunming 650500, Peoples R China
3.Yunnan Univ, Inst Palaeontol, MEC Int Joint Lab Palaeobiol & Palaeoenvironm, Kunming 650500, Peoples R China
4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
5.Univ Oxford, Oxford Univ Museum Nat Hist, Oxford OX1 3PW, England
6.Management Comm Chengjiang Fossil Site World Herit, Chengjiang 652599, Peoples R China
7.Nat Hist Museum, London SW7 5BD, England
推荐引用方式
GB/T 7714		 Li, Yujing,Dunn, Frances S.,Murdock, Duncan J. E.,et al. Cambrian stem-group ambulacrarians and the nature of the ancestral deuterostome[J]. CURRENT BIOLOGY,2023,33(12):2359-+.
APA Li, Yujing,Dunn, Frances S.,Murdock, Duncan J. E.,Guo, Jin,Rahman, Imran A.,&Cong, Peiyun.(2023).Cambrian stem-group ambulacrarians and the nature of the ancestral deuterostome.CURRENT BIOLOGY,33(12),2359-+.
MLA Li, Yujing,et al."Cambrian stem-group ambulacrarians and the nature of the ancestral deuterostome".CURRENT BIOLOGY 33.12(2023):2359-+.

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来源：南京地质古生物研究所

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