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来自新足迹地点的新型足迹形态表明，苏格兰斯凯岛的中侏罗世恐龙多样性增加。

Novel track morphotypes from new tracksites indicate increased Middle Jurassic dinosaur diversity on the Isle of Skye, Scotland.

机构信息

School of GeoSciences, University of Edinburgh, Edinburgh, Scotland, United Kingdom.

National Museums Scotland, Edinburgh, Scotland, United Kingdom.

出版信息

PLoS One. 2020 Mar 11;15(3):e0229640. doi: 10.1371/journal.pone.0229640. eCollection 2020.

DOI:10.1371/journal.pone.0229640
PMID:32160212
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7065758/
Abstract

Dinosaur fossils from the Middle Jurassic are rare globally, but the Isle of Skye (Scotland, UK) preserves a varied dinosaur record of abundant trace fossils and rare body fossils from this time. Here we describe two new tracksites from Rubha nam Brathairean (Brothers' Point) near where the first dinosaur footprint in Scotland was found in the 1980s. These sites were formed in subaerially exposed mudstones of the Lealt Shale Formation of the Great Estuarine Group and record a dynamic, subtropical, coastal margin. These tracksites preserve a wide variety of dinosaur track types, including a novel morphotype for Skye: Deltapodus which has a probable stegosaur trackmaker. Additionally, a wide variety of tridactyl tracks shows evidence of multiple theropods of different sizes and possibly hints at the presence of large-bodied ornithopods. Overall, the new tracksites show the dinosaur fauna of Skye is more diverse than previously recognized and give insight into the early evolution of major dinosaur groups whose Middle Jurassic body fossil records are currently sparse.

摘要

全球范围内中生代中期的恐龙化石十分罕见，但在斯凯岛（苏格兰，英国）保存了丰富的足迹化石和罕见的身体化石记录，这些化石来自这一时期。在这里，我们描述了两个新的足迹点，位于 Rubha nam Brathairean（兄弟角）附近，这里是 20 世纪 80 年代在苏格兰发现的第一个恐龙足迹的所在地。这些地点形成于大河口群的 Lealt 页岩组中暴露在空气中的泥岩中，记录了一个动态的、亚热带的、沿海边缘环境。这些足迹点保存了各种各样的恐龙足迹类型，包括一种新型的斯凯蜥脚类足迹，可能是由剑龙类恐龙留下的。此外，各种各样的三趾足迹显示出不同大小的多种兽脚类恐龙的证据，可能暗示着大型鸟脚类恐龙的存在。总的来说，新的足迹点表明斯凯岛的恐龙群比以前认为的更加多样化，并深入了解了那些目前中生代化石记录稀少的主要恐龙群体的早期进化。

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