Postcranial disparity of galeaspids and the evolution of swimming speeds in stem-gnathostomes | |
Gai, Zhikun1,2; Lin, Xianghong1; Shan, Xianren1,2; Ferron, Humberto3,4; Donoghue, Philip C.J.3 | |
2023-02-27 | |
发表期刊 | National Science Review |
期号 | 10页码:7 |
摘要 | Galeaspids are extinct jawless relatives of living jawed vertebrates whose contribution to understanding the evolutionary assembly of the gnathostome bodyplan has been limited by absence of postcranial remains. Here, we describe Foxaspis novemura gen. et sp. nov., based on complete articulated remains from a newly discovered Konservat-Lagerstätte in the Early Devonian (Pragian, ∼410 Ma) of Guangxi, South China. F. novemura had a broad, circular dorso-ventrally compressed headshield, slender trunk and strongly asymmetrical hypochordal tail fin comprised of nine ray-like scale-covered digitations. This tail morphology contrasts with the symmetrical hypochordal tail fin of Tujiaaspis vividus, evidencing disparity in galeaspid postcranial anatomy. Analysis of swimming speed reveals galeaspids as moderately fast swimmers, capable of achieving greater cruising swimming speeds than their more derived jawless and jawed relatives. Our analyses reject the hypothesis of a driven trend towards increasingly active food acquisition which has been invoked to characterize early vertebrate evolution. |
关键词 | Galeaspida Jawed Vertebrates Evolution Functional Morphology Phylogenetics Modelling |
DOI | 10.1093/nsr/nwad050 |
URL | 查看原文 |
资助项目 | Strategic Priority Research Program of Chinese Academy of Sciences[XDB26000000] ; National Nature Science Foundation of China[41972006] |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.205/handle/311034/22340 |
专题 | 古低等脊椎动物研究室 |
通讯作者 | Donoghue, Philip C.J. |
作者单位 | 1.Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China 2.University of Chinese Academy of Sciences, Beijing 100049, China 3.Bristol Palaeobiology Group, School of Earth Sciences, University 4.Instituto Cavanilles de Biodiversidad i Biolog´ıa Evolutiva, Universitat de Valencia, Paterna 46980, Valencia, Spain |
推荐引用方式 GB/T 7714 | Gai, Zhikun,Lin, Xianghong,Shan, Xianren,et al. Postcranial disparity of galeaspids and the evolution of swimming speeds in stem-gnathostomes[J]. National Science Review,2023(10):7. |
APA | Gai, Zhikun,Lin, Xianghong,Shan, Xianren,Ferron, Humberto,&Donoghue, Philip C.J..(2023).Postcranial disparity of galeaspids and the evolution of swimming speeds in stem-gnathostomes.National Science Review(10),7. |
MLA | Gai, Zhikun,et al."Postcranial disparity of galeaspids and the evolution of swimming speeds in stem-gnathostomes".National Science Review .10(2023):7. |
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