The Earliest Ursine Bear Demonstrates the Origin of Plant-Dominated Omnivory in Carnivora

doi:10.1016/j.isci.2020.101235

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	The Earliest Ursine Bear Demonstrates the Origin of Plant-Dominated Omnivory in Carnivora
	Jiangzuo, Qigao 1,2,3,4; Flynn, John J.2
刊名	ISCIENCE
	2020-06-26
卷号	23 期号:6 页码:51
DOI	10.1016/j.isci.2020.101235
英文摘要	In Carnivora, increases in body size often lead to dietary specialization toward hypercarnivory. Ursine bears (Tremarctos and Ursus), however, are the only omnivorous Carnivora that evolved large body sizes (i.e., >50 kg). Traits contributing to their gigantism, and how those traits evolved, have never been studied. Here we propose that special dental characters of Ursinae (parallel buccal and lingual ridges) permit a sagittally oriented mastication associated with increasing emphasis on plant foods. This pattern can be traced back to a new early diverging bear of plant-dominated omnivorous diet, Aurorarctos tirawa gen. et sp. nov. from the late Middle Miocene of North America, which was supported as the earliest known ursine bear by phylogenetic analysis. The anatomical transition to increased masticatory efficiency, probably together with the ability to hibernate, helped bears break prior ecological limitations on body size and led to the evolution of a distinctive lineage of herbivorous-omnivorous, large-bodied Carnivora.
资助项目	Strategic Priority Research Program of Chinese Academy of Sciences[XDB26000000] ; National Natural Science Foundation of China[41430102] ; China Scholarship Council ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA20070203] ; National Natural Science Foundation of China[41872005] ; Key Frontier Science Research Program of the Chinese Academy of Sciences[QYZDY-SSW-DQC-22] ; National Natural Science Foundation of China[41772018] ; Key Frontier Science Research Program of the Chinese Academy of Sciences[GJHZ1885] ; National Natural Science Foundation of China[41872001] ; Frick Fund of the Division of Paleontology at AMNH ; Paleontological Society student grant (USA)
WOS关键词	R PACKAGE ; DIET ; CONSTRAINTS ; MORPHOLOGY ; EVOLUTION ; INFERENCE ; ECOLOGY ; MRBAYES ; PANDA ; BITE
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	CELL PRESS
WOS记录号	WOS:000548239400007
内容类型	期刊论文
源URL	[http://119.78.100.205/handle/311034/17793]
专题	古脊椎动物与古人类研究所_图书馆1
通讯作者	Jiangzuo, Qigao
作者单位	1.CAS Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China 2.Amer Museum Nat Hist, Div Paleontol, New York, NY 10024 USA 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.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	Jiangzuo, Qigao,Flynn, John J.. The Earliest Ursine Bear Demonstrates the Origin of Plant-Dominated Omnivory in Carnivora[J]. ISCIENCE,2020,23(6):51.
APA	Jiangzuo, Qigao,&Flynn, John J..(2020).The Earliest Ursine Bear Demonstrates the Origin of Plant-Dominated Omnivory in Carnivora.ISCIENCE,23(6),51.
MLA	Jiangzuo, Qigao,et al."The Earliest Ursine Bear Demonstrates the Origin of Plant-Dominated Omnivory in Carnivora".ISCIENCE 23.6(2020):51.