A revision of the theropod dinosaur Camarillasaurus cirugedae from the Early Cretaceous of Spain

西班牙早白垩世兽脚亚目恐龙 Camarillasaurus cirugedae 的修订版

• 批准号: 400026377
• 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: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/400026377?language=en
• 关键词: revision; theropod; dinosaur; Camarillasaurus; cirugedae

Europe was mainly covered by epicontinental seas during the Upper Jurassic and Lower Cretaceous, so that terrestrial faunas were mainly restricted to several larger islands. Nevertheless, recent biogeographic analyses indicate that Europe represented an important "turntable" of terrestrial faunas between Asia, Africa, and North America at that time. One of the important islands in the Lower Cretaceous was Iberia, which included most of present day Spain and Portugal. Lower Cretaceous dinosaurs from Spain have become better known in the past 30 years, and especially ornithischian and sauropod dinosaurs have already yielded important data for our understanding of European dinosaur faunas of that time and their biogeographic relationships. However, theropod dinosaurs are much more poorly known; apart from the exceptionally preserved ornithomimosaur Pelecanimimus and the carcharodontosaur Concavenator from the laminated limestones of Las Hoyas, only one further taxon, Camarillasaurus cirugedae, has recently been described from the Barremian Camarillas Formation. This latter taxon is based on a fragmentary postcranial skeleton and was identified as a basal ceratosaur, with important implications for the evolution and diversity of this clade. However, a preliminary study of this material by the applicant highlighted several problems with the original interpretations of the remains and the identification as a ceratosaur. Furthermore, a visit to the site, from where the original materials were recovered by surface collection, demonstrated that there is potential to recover more material of this taxon. The objectives of the current project are thus a complete excavation of the type locality of Camarillasaurus and a revision of the anatomy and phylogenetic position of this taxon, based on both the original remains and newly discovered elements.This will lead to a better understanding of its importance for our knowledge of Early Cretaceous European dinosaur faunas and their biogeographic relationships.

欧洲主要由侏罗纪上侏罗纪和下白垩统的上层海洋覆盖，因此陆地动物群主要仅限于几个较大的岛屿。然而，最近的生物地理分析表明，欧洲当时是亚洲，非洲和北美之间的陆地动物区系的重要“转盘”。下白垩统的重要岛屿之一是伊比利亚，其中包括当今西班牙和葡萄牙的大部分时间。在过去的30年中，来自西班牙的白垩纪恐龙较低，尤其是Ornithischian和Sauropod恐龙已经产生了重要的数据，以了解我们对当时的欧洲恐龙动物群的理解及其生物地理关系。但是，兽脚类恐龙众所周知。除了从Las Hoyas层压的石灰石中脱落的鸟龙骨himimus和Carcharodontosaur凹源外，最近还从Barremian Camarillas的形成中描述了Camarillasaurus cirugedae。后一个分类单元基于碎片后的颅后骨骼，被确定为基底ceratosaur，对该进化枝的演变和多样性具有重要意义。但是，申请人对这项材料的初步研究强调了遗体的原始解释以及作为Ceratosaur的鉴定的几个问题。此外，访问该地点的访问是通过表面收集回收原始材料的，这表明有可能收回该分类单元的更多材料。因此，基于原始遗迹和新发现的元素，当前项目的目的是对Camarillasaurus的类型类型的完整发掘以及该分类群的解剖结构和系统发育位置的修订。这将使我们对早期欧洲欧洲恐龙Faunas和他们的生物学关系的了解更好地理解。