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; Zhao, LX (reprint author), Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China.
	2008-02-01
发表期刊	JOURNAL OF HUMAN EVOLUTION
ISSN	0047-2484
卷号	54 期号:2 页码:251-257
文章类型	Article
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.; 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	Age At First Molar Emergence Dental Development Life History Lufengpithecus Lufengensis
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
URL	查看原文
关键词[WOS]	DENTAL DEVELOPMENT ; HISTOLOGICAL RECONSTRUCTION ; LATE MIOCENE ; CHINA ; MICROSTRUCTURE ; ORANGUTAN ; YUNNAN ; DEATH ; HOMINOIDS ; THAILAND
收录类别	ISTP ; ISSHP ; SCI ; SSCI
语种	英语
WOS研究方向	Anthropology ; Evolutionary Biology
WOS类目	Anthropology ; Evolutionary Biology
WOS记录号	WOS:000257214700008
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/3281
专题	中科院古脊椎所（2000年以后）
通讯作者	Zhao, LX (reprint author), Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China.
作者单位	Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China
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]. JOURNAL OF HUMAN EVOLUTION,2008,54(2):251-257.
APA	Zhao, Lingxia,Lu, Qingwu,Zhang, Wending,&Zhao, LX .(2008).Age at first molar emergence in Lufengpithecus lufengensis and its implications for life-history evolution.JOURNAL OF HUMAN EVOLUTION,54(2),251-257.
MLA	Zhao, Lingxia,et al."Age at first molar emergence in Lufengpithecus lufengensis and its implications for life-history evolution".JOURNAL OF HUMAN EVOLUTION 54.2(2008):251-257.

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