Diversity and disparity of Anomodontia (Tetrapoda, Therapsida) across the Permian-Triassic extinction event

二叠纪-三叠纪灭绝事件期间异齿动物（四足动物、兽孔动物）的多样性和差异

• 批准号: 110080351
• 负责人: Professor Dr. Jörg Fröbisch, Ph.D.
• 金额: --
• 依托单位: Museum für Naturkunde - Leibniz-Institut für Evolutions- und Biodiversitätsforschung (MfN)
• 依托单位国家: 德国
• 项目类别: Research Fellowships
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/110080351?language=en
• 关键词: Diversity; disparity; Anomodontia; Tetrapoda; Therapsida

The end-Permian biotic crisis (~252.5 Ma) represents the most severe extinction event in Earth's history. My research investigates diversity patterns in Anomodontia, an extinct group of therapsid synapsids ('mammal-like reptiles'), through time and in particular across this event. As herbivores and the dominant terrestrial tetrapods of their time, anomodonts play a central role in assessing the impact of the end-Permian extinction on terrestrial ecosystems. The proposed study utilizes a combination of quantitative approaches to investigate phylogenetic and morphological diversity patterns within the group. A robust taxonomic and phylogenetic framework using modern systematic approaches forms the initial step of this study and will subsequently form the basis for an assessment of phylogenetic diversity and morphological disparity patterns within Anomodontia across the end-Permian extinction event. In addition to periods of biotic extinction, recovery, and diversification, this approach allows the identification of intervals of decelerated or accelerated rates of morphological evolution through time. My proposed research aims to shed new light on our understanding of the impact of the end-Permian extinction event on terrestrial ecosystems.

二叠纪末生物危机（~252.5 Ma）代表了地球历史上最严重的灭绝事件。我的研究调查了异齿动物（Anomodontia）的多样性模式，这是一种已灭绝的兽孔亚纲突触动物（“类哺乳动物爬行动物”）随着时间的推移，特别是在整个事件期间的多样性模式。作为食草动物和当时占主导地位的陆地四足动物，异齿兽在评估二叠纪末灭绝对陆地生态系统的影响方面发挥着核心作用。拟议的研究利用定量方法的组合来研究群体内的系统发育和形态多样性模式。使用现代系统方法的强大的分类学和系统发育框架构成了本研究的第一步，并将随后构成评估二叠纪末灭绝事件中异齿动物内的系统发育多样性和形态差异模式的基础。除了生物灭绝、恢复和多样化的时期之外，这种方法还可以识别形态进化随时间的减速或加速的间隔。我提出的研究旨在为我们了解二叠纪末灭绝事件对陆地生态系统的影响提供新的线索。