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首页> 外文期刊>Scottish Journal of Geology >Theropod dinosaurs from the Middle Jurassic (Bajocian-Bathonian) of Skye, Scotland
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Theropod dinosaurs from the Middle Jurassic (Bajocian-Bathonian) of Skye, Scotland

机译：来自苏格兰斯凯岛中侏罗纪（巴乔亚-巴松岛）的兽脚亚目恐龙

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摘要

The Isle of Skye, Scotland, has yielded a diverse Middle Jurassic terrestrial vertebrate fauna, but little is known about the predatory dinosaurs (theropods) occupying the top and secondary carnivore roles in these ecosystems, as their fossils have been limited to rare footprints of small-to mid-sized taxa. We describe two isolated theropod body fossils, a tooth and a middle-posterior caudal vertebra, from the late Bajocian-Bathonian Valtos Sandstone Formation of northeastern Skye, and use a variety of quantitative techniques to determine their taxonomic affinities. We conservatively refer both specimens to Theropoda indet., but suggest that the tooth most likely belonged to a megalosaurid, basal tyrannosauroid, or dromaeosaurid, and that the vertebra belonged to a small-bodied basal coelurosaur of approximately the same size as Coelurus (c. 2 m long, c. 30 kg mass). Although fragmentary, these fossils and the footprints demonstrate that both small and mid to large theropods were present in the Middle Jurassic of Scotland, and that these may have included some of the oldest coelurosaurs, and potentially some of the earliest-diverging tyrannosauroids and dromaeosaurids.
机译：苏格兰斯凯岛（Isle of Skye）产生了多种中侏罗世陆生脊椎动物，但对于在这些生态系统中占据食肉动物最高和次要角色的掠食性恐龙（兽脚类）知之甚少，因为它们的化石仅限于小型的罕见足迹-中型分类单元。我们描述了两个孤立的兽脚类动物化石，一个牙齿和一个后中尾椎骨，它们来自斯凯岛东北部的晚巴约西亚－巴松尼亚瓦尔托斯砂岩组，并使用各种定量技术来确定它们的分类学亲和力。我们保守地将这两个标本都参考Theropoda indet。，但建议该牙齿最有可能属于巨龙龙，基底暴龙或Dromaeosaurid，而椎骨属于小体基底龙骨，与Coelurus大小相同（c。 2 m长，约重30公斤）。这些化石和脚印虽然是零碎的，但它们表明苏格兰中侏罗纪存在小型和中型到大型的兽脚类动物，其中可能包括一些最古老的腔骨龙，可能还包括一些最早的暴龙类和类恐龙。

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