Evolutionary trend in dental size in fossil orangutans from the Pleistocene of Chongzuo, Guangxi, southern China

doi:10.1016/j.jhevol.2021.103090

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	Evolutionary trend in dental size in fossil orangutans from the Pleistocene of Chongzuo, Guangxi, southern China
	Harrison, Terry 4; Zhang, Yingqi 2,3; Yang, Liyun 1; Yuan, Zengjian 1
刊名	JOURNAL OF HUMAN EVOLUTION
	2021-12-01
卷号	161 页码:9
关键词	Pongo Dentition Taxonomy Paleobiology Primate community
ISSN号	0047-2484
DOI	10.1016/j.jhevol.2021.103090
通讯作者	Harrison, Terry(terry.harrison@nyu.edu)
英文摘要	More than 800 isolated teeth of fossil Pongo have been recovered from cave sites in the vicinity of Chongzuo in Guangxi, southern China, ranging from the Early to Late Pleistocene (2.0-0.1 Ma). These collections provide a unique regional window into the evolutionary history of orangutans over a two-million-year period at the northernmost extent of their former geographic range. Here we investigate the nature and timing of the evolutionary change in the dental size of fossil orangutans from Chongzuo. Fossil tooth size (mesiodistal length*buccolingual breadth) was compared against an extant Pongo pygmaeus standard (n = 106 individuals). During the course of the Pleistocene, orangutans from southern China exhibited a progressive reduction in overall dental size. Early Pleistocene Pongo has cheek teeth with occlusal areas that are 38.1% larger than those of extant P. pygmaeus. Those from the Middle and Late Pleistocene are 25.2% and 18.9% larger, respectively. Previously, the size difference in dentition between the Early toMiddle Pleistocene and Middle to Late Pleistocene samples was used to differentiate time-successive species of Pongo, namely Pongo weidenreichi and Pongo devosi. However, with access to larger samples and better representation of populations through time, the evidence in support of this taxonomic arrangement requires reconsideration. Diminution of the teeth now appears to be a gradual evolutionary transformation rather than a punctuated event. Moreover, the morphological features that distinguish the Chongzuo fossil orangutans from extant Pongo spp. remain uniform throughout the Pleistocene. Retaining P. weidenreichi and P. devosi as anagenetic species remains an option, but, given the current evidence, we consider it preferable to assign all of the fossil orangutans from Chongzuo to P. weidenreichi. Beyond resolving questions of alpha taxonomy, the study of fossil orangutan dental size provides a basis for estimating body mass, which has implications for interpreting the paleobiology of Pleistocene Pongo in southern China. (C) 2021 Published by Elsevier Ltd.
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences[XDB26000000]
WOS关键词	PONGO-PYGMAEUS-WURMBII ; GIGANTOPITHECUS-BLACKI ; BODY-MASS ; ELEPHAS-MAXIMUS ; 1ST DISCOVERY ; QUEQUE CAVE ; SANHE CAVE ; ECOLOGY ; BEHAVIOR ; FAUNAS
WOS研究方向	Anthropology ; Evolutionary Biology
语种	英语
出版者	ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
WOS记录号	WOS:000720358900004
资助机构	Strategic Priority Research Program of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://119.78.100.205/handle/311034/19210]
专题	古脊椎动物与古人类研究所_图书馆1
通讯作者	Harrison, Terry
作者单位	1.Zhuang Ethnol Museum Chongzuo, Chongzuo, Guangxi, Peoples R China 2.CAS Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China 3.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China 4.NYU, Dept Anthropol, Ctr Study Human Origins, New York, NY 10003 USA
推荐引用方式 GB/T 7714	Harrison, Terry,Zhang, Yingqi,Yang, Liyun,et al. Evolutionary trend in dental size in fossil orangutans from the Pleistocene of Chongzuo, Guangxi, southern China[J]. JOURNAL OF HUMAN EVOLUTION,2021,161:9.
APA	Harrison, Terry,Zhang, Yingqi,Yang, Liyun,&Yuan, Zengjian.(2021).Evolutionary trend in dental size in fossil orangutans from the Pleistocene of Chongzuo, Guangxi, southern China.JOURNAL OF HUMAN EVOLUTION,161,9.
MLA	Harrison, Terry,et al."Evolutionary trend in dental size in fossil orangutans from the Pleistocene of Chongzuo, Guangxi, southern China".JOURNAL OF HUMAN EVOLUTION 161(2021):9.