Molar crown formation times of fossil orangutan molars from Guangxi, China
文献类型：期刊论文
| 作者 | Hu, Rong2; Zhao, Lingxia1 |
| 刊名 | AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY
 |
| 出版日期 | 2020-11-30 |
| 页码 | 12 |
| 关键词 | crown formation time fossil orangutan Guangxi |
| ISSN号 | 0002-9483 |
| DOI | 10.1002/ajpa.24183 |
| 通讯作者 | Hu, Rong(hurong314@xmu.edu.cn) ; Zhao, Lingxia(zhaolingxia@ivpp.ac.cn) |
| 英文摘要 | Objectives We aimed to investigate molar enamel development in fossil orangutans from Guangxi and shed light on the evolution of Asian great apes. Materials and methods We collected 32 fossil orangutan molars, most of which were from Guangxi apothecaries and the Guangxi Daxin Heidong cave, and prepared histological sections of each molar. We then characterized aspects of dental development, including long period line periodicity, number of Retzius lines and lateral enamel formation time, cuspal enamel thickness, and enamel formation time. Results The long period line periodicity in fossil orangutans ranged from 9 to 10 days (mean, 9.09 days). The molar lateral enamel formation time ranged from 1.48 to 3.17 years (540-1,152 days). Cuspal enamel thickness in fossil orangutan molars ranged from 949 to 2,535 mu m, and cuspal enamel formation time ranged from 0.64 to 1.87 years. Molar enamel formation time of fossil orangutans ranged from 2.47 to 4.67 years. Discussion Long-period line periodicity of fossil orangutans from Guangxi was within the variation range of extant orangutans, and the average long period line periodicity (9.09 days) of fossil orangutans from Guangxi in this study was lower than the values for extant orangutans (9.5 days) and fossil orangutans (10.9 days) from Sumatra and Vietnam. Orangutan enamel thickness may have gradually decreased from the Middle Pleistocene to Holocene. Crown formation time of fossil orangutans was slightly longer than that of extant orangutans, and the M1 emergence age of fossil orangutans from Guangxi was about 4-6 years. These findings might indicate the regional difference or evolutionary changes in orangutans since Pleistocene. Dental development of the Guangxi fossil orangutans were more similar to that of Asian Miocene apes, suggesting the closer evolutionary relationship of orangutans to Miocene Asian fossil apes. |
| WOS关键词 | DENTAL DEVELOPMENT ; LIFE-HISTORY ; ENAMEL THICKNESS ; HISTOLOGICAL RECONSTRUCTION ; SUMATRAN ORANGUTAN ; PONGO ; MICROSTRUCTURE ; EVOLUTION ; AFRICAN ; CHONGZUO |
| 资助项目 | National Natural Science Foundation of China[41502009] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB26000000-XDB26030104] |
| WOS研究方向 | Anthropology ; Evolutionary Biology |
| 语种 | 英语 |
| WOS记录号 | WOS:000594217700001 |
| 出版者 | WILEY |
| 资助机构 | National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences |
| 源URL | [http://119.78.100.205/handle/311034/18836]  |
| 专题 | 中国科学院古脊椎动物与古人类研究所 |
| 通讯作者 | Hu, Rong; Zhao, Lingxia |
| 作者单位 | 1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing, Peoples R China 2.Xiamen Univ, Dept Anthropol & Ethol, Inst Anthropol, Xiamen 361005, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, Rong,Zhao, Lingxia. Molar crown formation times of fossil orangutan molars from Guangxi, China[J]. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY,2020:12. |
| APA | Hu, Rong,&Zhao, Lingxia.(2020).Molar crown formation times of fossil orangutan molars from Guangxi, China.AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY,12. |
| MLA | Hu, Rong,et al."Molar crown formation times of fossil orangutan molars from Guangxi, China".AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY (2020):12. |
入库方式： OAI收割
来源：古脊椎动物与古人类研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。