Cranial endocast of the stem lagomorph Megalagusand brain structure of basal Euarchontoglires

doi:10.1098/rspb.2020.0665

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	Cranial endocast of the stem lagomorph Megalagusand brain structure of basal Euarchontoglires
	Lopez-Torres, Sergi 2,3,4,5; Bertrand, Ornella C.6; Lang, Madlen M.1; Silcox, Mary T.1; Fostowicz-Frelik, Lucja 5,7,8
刊名	PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
	2020-06-24
卷号	287 期号:1929 页码:9
关键词	Euarchontoglires lagomorphs Palaeogene endocast evolution
ISSN号	0962-8452
DOI	10.1098/rspb.2020.0665
英文摘要	Early lagomorphs are central to our understanding of how the brain evolved in Glires (rodents, lagomorphs and their kin) from basal members of Euarchontoglires (Glires + Euarchonta, the latter grouping primates, treeshrews, and colugos). Here, we report the first virtual endocast of the fossil lagomorphMegalagus turgidus, from the Orella Member of the Brule Formation, early Oligocene, Nebraska, USA. The specimen represents one of the oldest nearly complete lagomorph skulls known. Primitive aspects of the endocranial morphology inMegalagusinclude large olfactory bulbs, exposure of the midbrain, a small neocortex and a relatively low encephalization quotient. Overall, this suggests a brain morphology closer to that of other basal members of Euarchontoglires (e.g. plesiadapiforms and ischyromyid rodents) than to that of living lagomorphs. However, the well-developed petrosal lobules inMegalagus, comparable to the condition in modern lagomorphs, suggest early specialization in that order for the stabilization of eye movements necessary for accurate visual tracking. Our study sheds new light on the reconstructed morphology of the ancestral brain in Euarchontoglires and fills a critical gap in the understanding of palaeoneuroanatomy of this major group of placental mammals.
资助项目	National Science Centre (Cracow, Poland)[2015/18/E/NZ8/00637] ; NSERC ; Marie Sklodowska-Curie Actions: Individual Fellowship (H2020-MSCA-IF-2018-2020)[792611] ; Natural Sciences and Engineering Research Council of Canada (NSERC) CGS grant
WOS关键词	VIRTUAL ENDOCASTS ; EVOLUTION ; MAMMALIA ; PRIMATES ; APATOTHERIA ; MORPHOLOGY ; PALEOCENE ; EOCENE ; APATEMYIDAE ; ANATOMY
WOS研究方向	Life Sciences & Biomedicine - Other Topics ; Environmental Sciences & Ecology ; Evolutionary Biology
语种	英语
出版者	ROYAL SOC
WOS记录号	WOS:000545646000001
内容类型	期刊论文
源URL	[http://119.78.100.205/handle/311034/17734]
专题	古脊椎动物与古人类研究所_图书馆1
通讯作者	Fostowicz-Frelik, Lucja
作者单位	1.Univ Toronto Scarborough, Dept Anthropol, Toronto, ON, Canada 2.Amer Museum Nat Hist, Div Paleontol, New York, NY 10024 USA 3.Amer Museum Nat Hist, Richard Gilder Grad Sch, New York, NY 10024 USA 4.New York Consortium Evolutionary Primatol, New York, NY USA 5.Polish Acad Sci, Inst Paleobiol, Dept Evolutionary Paleobiol, Warsaw, Poland 6.Univ Edinburgh, Sch Geosci, Edinburgh EH9 3FE, Midlothian, Scotland 7.CAS Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China 8.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China
推荐引用方式 GB/T 7714	Lopez-Torres, Sergi,Bertrand, Ornella C.,Lang, Madlen M.,et al. Cranial endocast of the stem lagomorph Megalagusand brain structure of basal Euarchontoglires[J]. PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES,2020,287(1929):9.
APA	Lopez-Torres, Sergi,Bertrand, Ornella C.,Lang, Madlen M.,Silcox, Mary T.,&Fostowicz-Frelik, Lucja.(2020).Cranial endocast of the stem lagomorph Megalagusand brain structure of basal Euarchontoglires.PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES,287(1929),9.
MLA	Lopez-Torres, Sergi,et al."Cranial endocast of the stem lagomorph Megalagusand brain structure of basal Euarchontoglires".PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES 287.1929(2020):9.