Dental Microwear and Plio-Pleistocene Ceropithecoids

牙科微磨损和上古-更新世 Ceropithecoids

• 批准号: 8904327
• 负责人: Mark Teaford
• 金额: $ 14.85万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-07-01 至 1993-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8904327&HistoricalAwards=false
• 关键词: Dental; Microwear; Plio; Pleistocene; Ceropithecoids

This project is a dental microwear analysis of over 8000 specimens of the Plio-Pleistocene cercopithecoid primates of East Africa. High resolution dental impressions will be taken of teeth from most of the major East African sites. Impressions will also be taken from museum collections of modern African monkeys. As in previous dental microwear analyses, epoxy casts will be examined under a scanning electron microscope (SEM); measurements of the size, shape, and orientation of microscopic wear features will be computed from SEM micrographs; measurements of macroscopic wear patterns will be computed with a three- dimensional measuring microscope; and all measurements will be used in statistical comparisons within and between modern and extinct taxa. The study of dental microwear is one of the promising new techniques for obtaining detailed information on the diet of fossil animals and humans. This analysis should lead to new insights into (1) the methodology of dental microwear analysis, (2) the phylogenetic change and adaptations of the Plio- Pleistocene cercopitheoid primates, and (3) the paleo-ecology of the early hominid fossil sites of East Africa.

本项目是对东非上新世-更新世颈猿灵长类动物的8000多个标本进行牙齿微磨损分析。高分辨率的牙印将取自东非大多数主要地点的牙齿。还将从博物馆收藏的现代非洲猴子中提取印象。与之前的牙齿微磨损分析一样，环氧树脂铸件将在扫描电子显微镜（SEM）下进行检查；微观磨损特征的尺寸，形状和方向的测量将从SEM显微照片计算；宏观磨损模式的测量将用三维测量显微镜计算；所有的测量都将用于现代和灭绝分类群内部和之间的统计比较。牙齿微磨损的研究是获得化石动物和人类饮食详细信息的有前途的新技术之一。这一分析将对以下几个方面产生新的见解：(1)牙齿微磨损分析的方法，(2)上新世-更新世类蛇尾灵长类动物的系统发育变化和适应，以及(3)东非早期人科动物化石遗址的古生态学。