Morphology, Function and Systematics in Upper Carboniferous Ammonoids

上石炭统菊石的形态、功能和系统学

• 批准号: 9105350
• 负责人: W. Bruce Saunders
• 金额: $ 8.96万
• 依托单位: Bryn Mawr College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-07-15 至 1995-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9105350&HistoricalAwards=false
• 关键词: Morphology; Function; Systematics; Upper; Carboniferous

It is possible to analyze fossil shelled cephalopods in terms of external shell morphology and hydromechanical characteristics, using microcomputer simulations and principal components analysis. This approach will be combined with indexing of internal sutural form, in order to (a) document the morphological history of Upper Carboniferous ammonoids in terms of whole-shell and hydromechanical characteristics; (b) determine whether there is a functional basis to existing phylogenetic-based systematic schemes for Carboniferous ammonoids; (c) attempt to determine the extent to which sutural form influences ammonoid hydrostatics, and to track changes in sutural complexity against shell form and hydrostatics through time, in an effort to evaluate the functional role of the suture and (d) relate the evolutionary history and diversity of morphological and hydromechanical characteristics of Upper Carboniferous ammonoids to existing models of paleoecology and sea- level curves for this interval.

有壳的头足类动物化石可以用 外壳形态和流体力学特性， 使用微机模拟和主成分分析。 这种方法将与内缝转位相结合， 形式，以（a）文件的形态历史上 石炭纪菊石的全壳性和流体力学性质 （B）确定是否存在功能基础 对现有的石炭纪基于成岩作用的系统方案， （c）试图确定缝合的程度 形式影响菊石流体静力学，并跟踪 缝合线复杂性对壳体形状和流体静力学通过 时间，以评价缝线的功能作用 （d）将生物的进化历史和多样性 Upper的形态和流体力学特性 石炭纪菊石与现有的古生态学和海洋- 此区间的水平曲线。