Middle to Late Jurassic archosaurs from Chubut Province, Argentinean Patagonia and Jurassic archosaur radiations in the Southern Hemisphere

阿根廷巴塔哥尼亚丘布特省的中晚侏罗世主龙和南半球侏罗纪主龙辐射

• 批准号: 64345319
• 负责人: Professor Dr. Oliver Rauhut, Ph.D.
• 金额: --
• 依托单位: Sektion Paläontologie und Geobiologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2012-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/64345319?language=en
• 关键词: Middle; Late; Jurassic; archosaurs; Chubut

The Jurassic is an important period for our understanding of vertebrate evolution and biodiversity, since it saw the first major radiations of many important clades, including crocodilian, pterosaurian and dinosaurian archosaurs. It has been suggested that the initial break-up of the supercontinent of Pangea during this period was an important factor in Jurassic vertebrate evolution. However, our knowledge of the changes of especially terrestrial vertebrate faunas during this time is actually based on comparatively few localities, which are almost exclusively found in the Northern Hemisphere. Chubut province, Argentina, has yielded the only terrestrial Jurassic archosaur faunas known from South America. Furthermore, archosaurs are found here in two different formations, which span the time period during which the separation of Gondwana took place, making this area a potential key area for our understanding of changes in archosaurian faunas from the Middle to the Late Jurassic in the Southern Hemisphere. The objective of the current proposal is thus to improve our knowledge of Jurassic archosaur evolution by carrying out intensive fieldwork in both of these formations and by detailed studies of the resulting material.

侏罗纪是我们了解脊椎动物进化和生物多样性的重要时期，因为它见证了许多重要分支的首次大规模辐射，包括鳄鱼、翼龙和恐龙祖龙。有人认为，这一时期盘古大陆超大陆的最初分裂是侏罗纪脊椎动物进化的一个重要因素。然而，我们对这一时期特别是陆生脊椎动物区系变化的了解实际上是基于相对较少的地区，这些地区几乎只在北半球发现。阿根廷丘布特省孕育了南美洲唯一已知的陆生侏罗纪主龙动物群。此外，这里发现了两种不同形态的祖龙，它们跨越了冈瓦纳大陆分离的时期，这使得该地区成为我们了解南半球中侏罗世至晚侏罗世期间祖龙动物区系变化的潜在关键区域。因此，当前提案的目标是通过在这两个地层中进行深入的实地考察并对所得材料进行详细研究，以提高我们对侏罗纪祖龙进化的了解。