Zoogeography and paleoecologic distribution of brachiopods from the Late Ordovician to the Middle Silurian

该项目将综合晚奥陶世至中志留世腕足类的动物地理和古环境分布的全球记录。将追踪奥陶纪-志留纪大规模灭绝事件对动物地理和古生态的影响，以检查恢复和重组的速度。初步结果表明，腕足类的广泛分布有助于物种灭绝期间的生存，这一模式将得到更密切的研究，并将检查这种模式是否适用于从浅到深的六个古环境带中的每一个。构建时间-环境图将允许详细检查腕足类群的进化史和环境分布。

This project will synthesize the global record of zoogeographic and paleoenvironmental distribution of Late Ordovician to Middle Silurian brachiopods. The effects of the massive Ordovician-Silurian extinction event on zoogeography and paleoecology will be traced in order to examine rates of recovery and reorganization. Preliminary results indicating that wide distribution of brachiopods promoted survival during the extinction will be examined more closely, and the pattern will be examined to see whether or not it holds in each of six paleoenvironmental zones arrayed from shallow to deep environments. Construction of time-environment diagrams will permit detailed examination of the evolutionary history and environmental distribution of brachiopod groups.