New fossils from Tanzania reveal the rapid diversification of Archosauria

坦桑尼亚的新化石揭示了主龙类的快速多样化

• 批准号: 1024036
• 负责人: Christian Sidor
• 金额: $ 16万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-15 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1024036&HistoricalAwards=false
• 关键词: New; fossils; Tanzania; reveal; rapid

New fossils from Tanzania reveal the rapid diversification of Archosauria.Christian A. Sidor (PI)Sterling J. Nesbitt (Senior Personnel)This grant supports a two-year postdoctoral research associate position for Sterling J. Nesbitt at the University of Washington, under the supervision of Christian A. Sidor (PI). Sidor and Nesbitts recent fieldwork in southern Tanzania has yielded a large collection of archosaur fossils from the Middle Triassic (approximately 240 million years ago). Living archosaurs include birds and crocodiles, but extinct members of this group encompass numerous taxa like aetosaurs, erpetosuchids, and notably, dinosaurs and their close relatives. Utilizing the new collection of fossils, Sidor and Nesbitt will collaborate to describe several species and interpret each in terms of its position on the archosaur family tree. More specifically, they will reanalyze Parringtonia (which was initially named in 1939), provide a complete anatomical description of the dinosauriform Asilisaurus (which they announced in 2010), and describe a new, aetosaur-like taxon and a new rauisuchian. Sidor and Nesbitt will also examine the Tanzanian archosaur fauna as a whole, by revising the biostratigraphy of the archosaur-bearing strata, and by gauging how the group diversified after the Permian-Triassic mass extinction in the Ruhuhu Basin of Tanzania relative to other contemporaneous geologic basins. Vertebrate paleontology fascinates the public. As part of the broader impact goals of this project, Sidor and Nesbit will develop a temporary display at the University of Washingtons Burke Museum, to highlight some of the best specimens from Tanzania and to explain how fossils and rocks can inform scientists about past climates (e.g., the Triassic hot-house world lacked polar glaciers). Sidor and Nesbitt will also curate the collection of archosaur fossils in anticipation of its repatriation to the National Museum of Tanzania in Dar es Salaam. However, research-quality casts will be created and retained at the Burke Museum.

来自坦桑尼亚的新化石揭示了Archosauria的快速多样化。基督教艾斯林·J·内斯比特（高级人员），在基督教A. Sidor的监督下，华盛顿大学的Sterling J. Nesbitt的两年期博士后研究助理（PI）支持了两年的博士后研究助理。 Sidor和Nesbitts最近在坦桑尼亚南部的实地考察从中部三叠纪（大约2.4亿年前）产生了大量的弓形化石。 活着的档案馆包括鸟类和鳄鱼，但该小组的灭绝成员包括许多分类单元，例如Aetosaurs，Erpetosuchids，以及尤其是恐龙及其近亲。 利用新的化石集合，Sidor和Nesbitt将合作描述几种物种，并根据其在Archosaur家族树上的位置进行解释。 更具体地说，他们将重新分析Parringtonia（最初在1939年命名），对恐龙龙Asilisaurus（他们在2010年宣布）提供了完整的解剖学描述，并描述了一种新的类似雅Etosaur的类群和新的RauiSuchian。 Sidor和Nesbitt还将通过修订塔萨龙河畔的坦桑尼亚弓箭手动物群，并通过修改账面库阶层的生物地层学，并通过衡量该群体在二叠纪三叠纪的大规模灭绝后如何在坦桑尼亚的ruhuhu盆地中分散了坦桑尼亚的tanzania相对于其他现代基础的基础。 脊椎动物古生物学使公众着迷。 作为该项目的更广泛影响目标的一部分，旁白和内斯比特将在华盛顿大学伯克大学博物馆开发临时展示，以突出一些来自坦桑尼亚的最佳标本，并解释化石和岩石如何为科学家提供有关过去的气候的信息（例如，Triassic Hothouse World World缺少极地极地冰川）。 Sidor和Nesbitt还将策划收集Archosaur化石的收集，以期将其遣返归还到达累斯萨拉姆的坦桑尼亚国家博物馆。 但是，将在伯克博物馆创建和保留研究质量的演员阵容。