Late Triassic terrestrial microvertebrates from Charles Moore's ‘Microlestes’ quarry, Holwell, Somerset, UK
Late Triassic terrestrial microvertebrates from Charles Moore's ‘Microlestes’ quarry, Holwell, Somerset, UK
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来自英国萨默塞特郡霍尔韦尔查尔斯·摩尔“Microlestes”采石场的三叠纪晚期陆生微型脊椎动物
DOI：
10.1111/zoj.12458
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发表时间：
2017
影响因子：
2.8
通讯作者：
C. Duffin
中科院分区：
文献类型：
--
作者：
D. Whiteside;C. Duffin
布里斯托尔地区和南威尔士的裂缝地区产生了一些最重要的晚三叠世和早侏罗世小型四足动物。霍尔韦尔 (Holwell) 的“Microlestes”采石场裂缝产生了最多样化的动物群，最初由著名业余地质学家查尔斯·摩尔 (Charles Moore) 在 1850 年代进行了调查。哺乳类动物和海洋鱼类已有详细记录，但对陆地小型爬行动物化石的报道很少，几乎没有任何描述。我们通过对可归属于爬虫类的骨骼和牙齿的描述来解决这一缺陷，证实了双齿龙的存在并描述了两种新的喙头类动物。我们认识到 Variodens inopinatus Robinson（1957 年）和 Gephyrosaurus Evans（1980 年）的存在：这是第一次在它们的原始地点之外记录到它们。此外，我们还记录了前齿类、放线纲 Pholidophorus 的元素，以及一些未命名的鳞龙标本，这些标本显示出不同程度的侧齿 - 尖齿植入，为了解喙头类的进化提供了见解。我们的研究结果表明，霍尔韦尔是英国西南部晚三叠世和早侏罗世的蜥脚类和哺乳动物裂隙动物群之间的关键联系。
The fissure localities of the Bristol region and South Wales have yielded some of the most important Late Triassic and Early Jurassic small tetrapods. The ‘Microlestes’ quarry fissure at Holwell, which has produced the most diverse overall fauna, was originally investigated in the 1850s by the renowned amateur geologist, Charles Moore. The mammaliamorphs and marine fish have been well documented, but there are few reports and barely any descriptions of the terrestrial small reptile fossils. We address that deficiency with a description of the bones and teeth that can be assigned to the Reptilia, confirming the presence of Diphydontosaurus and describing two new rhynchocephalians. We recognise the presence of Variodens inopinatus Robinson, 1957 and Gephyrosaurus Evans, 1980: the first time that they have been recorded outside their original sites. Additionally, we record a procolophonid, elements of the actinopterygian Pholidophorus, and a number of unnamed lepidosaur specimens that show varying degrees of pleurodont–acrodont implantation, providing an insight into the evolution of rhynchocephalians. Our findings demonstrate that Holwell is a key link between the sauropsid and mammaliamorph fissure faunas of the Late Triassic and Early Jurassic of the south-west UK.