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首页> 外文期刊>Zoological Journal of the Linnean Society >Anatomical study of two previously undescribed specimens of Clevosaurus hudsoni (Lepidosauria: Rhynchocephalia) from Cromhall Quarry, UK, aided by computed tomography, yields additional information on the skeleton and hitherto undescribed bones
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Anatomical study of two previously undescribed specimens of Clevosaurus hudsoni (Lepidosauria: Rhynchocephalia) from Cromhall Quarry, UK, aided by computed tomography, yields additional information on the skeleton and hitherto undescribed bones

机译：来自UK的Clevosaurus Hudsoni（Lepidosauria：Rhynchocephalia）的两种先前未描述的标本的解剖学研究来自UK的Cromhall Quary，通过计算机断层扫描，在骨架和迄今为止的骨骼上产生更多信息

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摘要

We investigate two well-preserved and previously undescribed specimens of Clevosaurus hudsoni from a Late Triassic fissure deposit at Cromhall Quarry, SW Britain. For the first time computed tomography (CT) scans of British Triassic fissure specimens have been successfully digitally segmented. Visualisation software was used to isolate bone from matrix and to separate individual bones from each other, revealing hidden cranial and postcranial elements. The CT data, together with stereoscopic microscope analysis, have enabled a full evaluation of the specimens including previously poorly known or undescribed elements of the type species of the clevosaur clade. We present detailed descriptions of the cervical vertebrae including the atlas-axis complex. Little studied bones such as the gastralia and epipodials are detailed here and a gap in the lower temporal bar is confirmed. Sclerotic ossicles are presented for the first time for C. hudsoni. A fully fused scapulocoracoid and unfused astragalus and calcaneum provide new insights into clevosaur ontogeny. The CT scans provide key information on post mortem movement and taphonomy of the specimen, revealing fragmentation of part of the skull by the right arm, which has been thrust into the right side of the skull displacing both cranial and jaw bones.
机译：我们在SW英国Cromhall采石场的后期三叠纪裂缝矿床中调查了两个保存的克利夫斯龙哈德森标本。对于第一次计算的断层扫描（CT）扫描的英国三叠系裂缝样本已成功分段。可视化软件用于将骨骼与矩阵隔离并彼此分离单独的骨骼，揭示隐藏的颅骨和后颅骨。 CT数据与立体显微镜分析一起，使得标本完全评估包括先前克利龙型克莱龙型物种的先前已知或未描述的元素。我们介绍了包括地图轴复合物的颈椎的详细描述。这里详述的诸如胃膜和膜状体等诸如Gastralabals和缩版之类的骨骼很少，并且确认下颞杆中的间隙。 Sclerotic纺织品首次呈现C. Hudsoni。一个完全融合的孤类杂皮素和未用的黄芪和康帕姆为克利夫斯龙组来产生了新的见解。 CT扫描提供有关验尸运动的关键信息，并揭示由右臂的部分头骨的碎片，这一直推入头骨的右侧，从而使颅骨和下颌骨骼移位。

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