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Endocast and Bony Labyrinth of a Devonian "Placoderm'' Challenges Stem Gnathostome Phylogeny

文献类型：期刊论文

作者Zhu, You-an7,8; Giles, Sam5,6; Young, Gavin C.1,2; Hu, Yuzhi1; Bazzi, Mohamad7; Ahlberg, Per E.7; Zhu, Min3,4,8; Lu, Jing4,8
刊名CURRENT BIOLOGY
出版日期2021-03-08
卷号31期号:5页码:1-7
ISSN号0960-9822
DOI10.1016/j.cub.2020.12.046
英文摘要Our understanding of the earliest evolution of jawed vertebrates depends on a credible phylogenetic framework for the jawed stem gnathostomes collectively known as "placoderms''.(1) However, their relationships, and whether placoderms represent a single radiation or a paraphyletic array, remain contentious.(2-13) This uncertainty is compounded by an uneven understanding of anatomy across the group, particularly of the phylogenetically informative braincase and brain cavity-endocast. Based on new tomographic data, we here describe the endocast and bony labyrinth of Brindabellaspis stensioi from the Early Devonian of New South Wales.(14) The taxon was commonly recovered as branching near the base of placoderms.(5-9,11,12,15-17) Previous studies of Brindabellaspis emphasized its resemblances with fossil jawless fishes in the braincase anatomy(14) and endocast proportions(1,18) and its distinctive features were interpreted as autapomorphies, such as the elongated premedian region.(19) Although our three-dimensional data confirmed the resemblance of its endocast to those of jawless vertebrates, we discovered that the inner ear and endolymphatic complex display a repertoire of previously unrecognized characters close to modern or crown-group jawed vertebrates, including a pronounced sinus superior and a vertical duct that connects the endolymphatic sac and the labyrinth cavity. Both parsimony and Bayesian analyses suggest that prevailing hypotheses of placoderm relationships are unstable, with newly revealed anatomy pointing to a radical revision of early gnathostome evolution. Our results call into question the appropriateness of arthrodire-like placoderms as models of primitive gnathostome anatomy and raise questions of homology relating to key cranial features.
资助项目Strategic Priority Research Program of Chinese Academy of Sciences[XDB26000000] ; National Natural Science Foundation of China[41530102] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA19050102] ; National Natural Science Foundation of China[41872023] ; Royal Society Dorothy Hodgkin Research Fellowship ; Australian Research Council[DP0772138] ; Australian Research Council[DP1092870] ; Wallenberg Scholarship from the Knut and Alice Wallenberg Foundation ; Swedish Research Council[2014-4102] ; Chinese Academy Sciences[E0CQ010103] ; National Science Fund for Excellent Young Scholars[42022011]
WOS研究方向Biochemistry & Molecular Biology ; Life Sciences & Biomedicine - Other Topics ; Cell Biology
语种英语
WOS记录号WOS:000633053100006
出版者CELL PRESS
源URL[http://119.78.100.205/handle/311034/18546]  
专题古脊椎动物与古人类研究所_图书馆1
通讯作者Lu, Jing
作者单位1.Australian Natl Univ, Res Sch Phys, Dept Appl Math, Canberra, ACT 2601, Australia
2.Australian Museum Res Inst, Sydney, NSW 2010, Australia
3.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
4.CAS Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China
5.Nat Hist Museum, Dept Earth Sci, Cromwell Rd, London SW7 5BD, England
6.Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham B15 2TT, W Midlands, England
7.Uppsala Univ, Subdept Evolut & Dev, Dept Organismal Biol, Norbyvagen 18A, S-75236 Uppsala, Sweden
8.Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origins, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China
推荐引用方式
GB/T 7714		 Zhu, You-an,Giles, Sam,Young, Gavin C.,et al. Endocast and Bony Labyrinth of a Devonian "Placoderm'' Challenges Stem Gnathostome Phylogeny[J]. CURRENT BIOLOGY,2021,31(5):1-7.
APA Zhu, You-an.,Giles, Sam.,Young, Gavin C..,Hu, Yuzhi.,Bazzi, Mohamad.,...&Lu, Jing.(2021).Endocast and Bony Labyrinth of a Devonian "Placoderm'' Challenges Stem Gnathostome Phylogeny.CURRENT BIOLOGY,31(5),1-7.
MLA Zhu, You-an,et al."Endocast and Bony Labyrinth of a Devonian "Placoderm'' Challenges Stem Gnathostome Phylogeny".CURRENT BIOLOGY 31.5(2021):1-7.

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