Comparative observations on the premolar root and pulp canal configurations of Middle Pleistocene Homo in China

doi:10.1002/ajpa.23777

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	Comparative observations on the premolar root and pulp canal configurations of Middle Pleistocene Homo in China
	Pan, Lei 1,2; Zanolli, Clement 3,4
	2019-03-01
发表期刊	AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY
ISSN	0002-9483
卷号	168 期号:3 页码:637-646
摘要	Objectives The aim of this study is to explore the root and root canal morphology of Homo fossil occupying China during the Middle Pleistocene period. Human occupation and evolutionary dynamics in East Asia during the Middle Pleistocene period is one of the most intriguing issues in paleoanthropology, with the coexistence of multiple lineages and regional morphs suggesting a complex population interaction scenario. Although premolar root and canal morphology has certain phylogenetic, taxonomic, and functional implications, its morphological diversity, possible evolutionary trend and characteristics regarding Middle Pleistocene hominins inhabiting East Asia are still insufficiently understood; where these populations fits within the Homo lineage (with respect to root and pulp canal structure) needs to be explored. Materials and methods Using microtomography, we directly observed and assessed the nonmetric variability of root and canal forms in maxillary and mandibular premolars of Chinese Middle Pleistocene Homo (N = 19), and compared our observed variations with Eurasian Early Pleistocene specimens from the Asia continent (N = 1) and Java (N = 2), as well as with Neanderthals (N = 28) and recent modern humans (N = 67). Results A total number of nine types of root-canal forms were recorded. As a whole, the Chinese Middle Pleistocene record shows an evolutionary trend toward a modern human-like condition (a reduction of root/canal number and a simplification of root surface structure). We documented primitive signals like high percentage of Tomes' root in lower premolars. A considerable occurrence of incompletely separated root branches and bifid root and canal apices, representing evolutionary transformation from multi-root to single-root condition was also noticed. The results were compared with previous publications on Early and Middle Pleistocene Homo in East Africa, North Africa, and Eurasia. Conclusion This work provides new original data, incorporates the latest human fossil discoveries and suggests that analyzing the variation of premolar root structural organization, notably integrating together root/canal form and number, could possibly contribute to taxonomic and phylogenetic assessments. The mid-Middle Pleistocene populations, or "classic" Homo erectus, in our study show closer affinity to Early and Middle Pleistocene hominins in Eurasia, than to East African early Homo, which supports the suggestion that at least some of the Early Pleistocene hominin groups in Eurasia contribute to the later population; on the other hand, it is still difficult to clearly trace the evolutionary fate of those late Middle Pleistocene populations (roughly assigned as archaic Homo sapiens through a craniodental perspective). More comparable materials from the Early to Middle Pleistocene period as well as precise chronological framework is needed to further explore the evolutionary trends of archaic hominins in the Asian continent before the arrival of modern humans.
关键词	Asian fossil Homo canal morphology micro-tomography premolar root morphology
DOI	10.1002/ajpa.23777
关键词[WOS]	DENTAL REMAINS ; HOMININ TEETH ; U-SERIES ; MODERN HUMANS ; PERMANENT TEETH ; MORPHOLOGY ; SITE ; ESR ; ATAPUERCA ; ERECTUS
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[41872030] ; National Natural Science Foundation of China[41702026] ; State Key Laboratory of Palaeobiology and Stratigraphy[173119]
WOS研究方向	Anthropology ; Evolutionary Biology
WOS类目	Anthropology ; Evolutionary Biology
WOS记录号	WOS:000458409000018
出版者	WILEY
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/9353
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Pan, Lei
作者单位	1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, 142 Xizhimenwai Str IVPP, Beijing 100044, 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, UMR 5288 CNRS, Lab AMIS, Toulouse, France 4.Univ Bordeaux, UMR 5199 CNRS, Lab PACEA, Bordeaux, France
推荐引用方式 GB/T 7714	Pan, Lei,Zanolli, Clement. Comparative observations on the premolar root and pulp canal configurations of Middle Pleistocene Homo in China[J]. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY,2019,168(3):637-646.
APA	Pan, Lei,&Zanolli, Clement.(2019).Comparative observations on the premolar root and pulp canal configurations of Middle Pleistocene Homo in China.AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY,168(3),637-646.
MLA	Pan, Lei,et al."Comparative observations on the premolar root and pulp canal configurations of Middle Pleistocene Homo in China".AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 168.3(2019):637-646.

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