Structural analysis of premolar roots in Middle Pleistocene hominins from China

doi:10.1016/j.jhevol.2019.102669

IVPP-IR > 中科院古脊椎所（2000年以后）

	Structural analysis of premolar roots in Middle Pleistocene hominins from China
	Pan, Lei 1,2; Dumoncel, Jean 3; Mazurier, Arnaud 4; Zanolli, Clement 3,5
	2019-11-01
发表期刊	JOURNAL OF HUMAN EVOLUTION
ISSN	0047-2484
卷号	136 页码:13
通讯作者	Pan, Lei(panlei@ivpp.ac.cn)
摘要	This study investigates permanent maxillary and mandibular premolar root structural organization in East Asian Middle Pleistocene hominins. In addition to reporting and analyzing the linear and volumetric properties of the roots, we used a landmark-free approach to both qualify and quantify in 3D premolar root shape variation of Middle Pleistocene hominins in East Asia. Moreover, we focus on some mid-to late East Asian Middle Pleistocene hominin specimens whose taxonomic attribution is unclear. We find considerable cementum in this sample of hominins, similar to other fossil groups, but clearly different from modern humans which have a very small amount of cementum. Additionally, a smaller root pulp cavity is found in later Homo (Neanderthals and modern humans). Our analyses on the crown-root surface area ratio show that East Asian Middle Pleistocene Homo erectus as well as one late Middle Pleistocene Homo sp. specimen (PA 81 P-4 from Changyang site) are distinguished from other fossil and extant groups by a relatively larger root surface, stout root branches and thick cementum deposits. This may represent a distinct East Asian H. erectus dental pattern. Geometric morphometric analyses on the external root surface reveal a general trend of shape simplification along the Homo lineage examined here, and distinguish Early Pleistocene Homo, Middle Pleistocene H. erectus, Neanderthals and modern human morphologies. The late Middle Pleistocene teeth from Changyang site (PA 76 P-3 and PA 81 P-4 ) are close to East Asian H. erectus and Neanderthals, while the mid-Middle Pleistocene P-3 from Panxian Dadong falls within the modern human distribution. Combined with dental crown morphology and root number/form reported in previous studies, our results show that the external root shape can be considered a taxonomically relevant indicator. In general, an evolutionary tendency towards modern human morphology is observed in part of the East Asian Middle Pleistocene specimens, while a retention of primitive, H. erectus-like features is expressed in some late Middle Pleistocene specimens, supporting a multi-lineage and discontinuous scenario of human settlements in East Asia. (C) 2019 Elsevier Ltd. All rights reserved.
关键词	East Asian Middle Pleistocene Homo Permanent premolar External root surface Crown-root tissue proportions
DOI	10.1016/j.jhevol.2019.102669
关键词[WOS]	ENAMEL-DENTIN JUNCTION ; GEOMETRIC MORPHOMETRIC-ANALYSIS ; U-SERIES ; AUSTRALOPITHECUS-AFRICANUS ; BRIEF COMMUNICATION ; CANAL MORPHOLOGY ; PANXIAN DADONG ; HOMO-ERECTUS ; 1ST PREMOLAR ; LOWER MOLARS
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[41702026] ; National Natural Science Foundation of China[41872030] ; State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS)[173119] ; French Centre National de la Recherche Scientifique (CNRS)
项目资助者	Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS) ; French Centre National de la Recherche Scientifique (CNRS)
WOS研究方向	Anthropology ; Evolutionary Biology
WOS类目	Anthropology ; Evolutionary Biology
WOS记录号	WOS:000497255100007
出版者	ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/16776
专题	中科院古脊椎所（2000年以后）
通讯作者	Pan, Lei
作者单位	1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China 2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing, Jiangsu, Peoples R China 3.Univ Toulouse III Paul Sabatier, CNRS, UMR 5288, Lab AMIS, Toulouse, France 4.Univ Poitiers, CNRS, UMR 7285, Inst Chim Milieux & Mat, F-86073 Poitiers, France 5.Univ Bordeaux, CNRS, UMR 5199, Lab PACEA, Bordeaux, France
推荐引用方式 GB/T 7714	Pan, Lei,Dumoncel, Jean,Mazurier, Arnaud,et al. Structural analysis of premolar roots in Middle Pleistocene hominins from China[J]. JOURNAL OF HUMAN EVOLUTION,2019,136:13.
APA	Pan, Lei,Dumoncel, Jean,Mazurier, Arnaud,&Zanolli, Clement.(2019).Structural analysis of premolar roots in Middle Pleistocene hominins from China.JOURNAL OF HUMAN EVOLUTION,136,13.
MLA	Pan, Lei,et al."Structural analysis of premolar roots in Middle Pleistocene hominins from China".JOURNAL OF HUMAN EVOLUTION 136(2019):13.