Age at first molar emergence in Lufengpithecus lufengensis and its implications for life-history evolution

IVPP-IR > 中科院古脊椎所（2000年以后）

	Age at first molar emergence in Lufengpithecus lufengensis and its implications for life-history evolution
	Zhao, Lingxia; Lu, Qingwu; Zhang, Wending; zhaolingxia@ivpp.ac.cn
	2008
发表期刊	J HUM EVOL
ISSN	0047-2484
卷号	54 期号:2
摘要	The late Miocene hominoid Lufengpithecus from Yunnan Province, China, is crucial for understanding hominoid evolution in Asia. Given that age at first permanent molar emergence is a key life-history trait in primates, the present study determined the age at death of the Lufengpithecus lufengensis juvenile PA868, which was in the process of erupting its first molar. Using a perikymata periodicity of 7-11 days, along with estimation of cusp formation time and the postnatal delay of crown mineralization, perikymata counts obtained from the permanent central incisor and canine germs indicate that the age at death of PA868 was 2.4-4.5 years based on the central incisor germ, and 2.5-4.7 years based on the canine germ. The age at the first molar emergence was actually slightly younger (by about 0.3 years), as demonstrated by tiny wear facets on this tooth, which indicate that gingival emergence had occurred sometime before death. The average age at first molar emergence of Lufengpithecus lufengensis PA868 is estimated to be 3.2-3.3 years, with a range of 2.1-4.4 years. In comparison to extant primates and other fossil hominoids, the life history of Lufengpithecus lufengensis is similar to that of extant great apes and the Miocene hominoids Afropithecus turkanensis and Sivapithectis parvada, as well as Plio-Pleistocene Australopithecus, and different from monkeys, gibbons, and modem humans. (C) 2007 Elsevier Ltd. All rights reserved.
关键词	Dental Development Histological Reconstruction Late Miocene China Microstructure Orangutan Yunnan Death Hominoids Thailand
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收录类别	SCI收录
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/4867
专题	中科院古脊椎所（2000年以后）
通讯作者	zhaolingxia@ivpp.ac.cn
推荐引用方式 GB/T 7714	Zhao, Lingxia,Lu, Qingwu,Zhang, Wending,et al. Age at first molar emergence in Lufengpithecus lufengensis and its implications for life-history evolution[J]. J HUM EVOL,2008,54(2).
APA	Zhao, Lingxia,Lu, Qingwu,Zhang, Wending,&zhaolingxia@ivpp.ac.cn.(2008).Age at first molar emergence in Lufengpithecus lufengensis and its implications for life-history evolution.J HUM EVOL,54(2).
MLA	Zhao, Lingxia,et al."Age at first molar emergence in Lufengpithecus lufengensis and its implications for life-history evolution".J HUM EVOL 54.2(2008).

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