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

doi:10.1016/j.cub.2020.12.046

IVPP-IR > 中科院古脊椎所（2000年以后）

	Endocast and Bony Labyrinth of a Devonian "Placoderm'' Challenges Stem Gnathostome Phylogeny
	Zhu, You-an 1,2; Giles, Sam 3,4; Young, Gavin C.5,6; Hu, Yuzhi 5; Bazzi, Mohamad 2; Ahlberg, Per E.2; Zhu, Min1,7,8 ; Lu, Jing 1,7
	2021-03-08
发表期刊	CURRENT BIOLOGY
ISSN	0960-9822
卷号	31 期号:5 页码:1-7
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.
DOI	10.1016/j.cub.2020.12.046
收录类别	SCI
语种	英语
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
WOS类目	Biochemistry & Molecular Biology ; Biology ; Cell Biology
WOS记录号	WOS:000633053100006
出版者	CELL PRESS
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/18547
专题	中科院古脊椎所（2000年以后）
通讯作者	Lu, Jing
作者单位	1.Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origins, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 2.Uppsala Univ, Subdept Evolut & Dev, Dept Organismal Biol, Norbyvagen 18A, S-75236 Uppsala, Sweden 3.Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham B15 2TT, W Midlands, England 4.Nat Hist Museum, Dept Earth Sci, Cromwell Rd, London SW7 5BD, England 5.Australian Natl Univ, Res Sch Phys, Dept Appl Math, Canberra, ACT 2601, Australia 6.Australian Museum Res Inst, Sydney, NSW 2010, Australia 7.CAS Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China 8.Univ Chinese Acad Sci, Beijing 100039, 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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