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1Braincase Anatomy of the Basal Theropod Sinosaurus from the Early Jurassic of China显示文摘The neuroanatomy of the mid-sized theropod Sinosaurus triassicus from the Lower Jurassic Lufeng Formation, Lufeng Basin in Yunnan Province, China was studied using X-ray computed tomography. The braincase is characterized by a large supraoccipital knob that is capped by a posterior projection of the parietal and two external foramina for the caudal middle cerebral vein, which is completely enclosed by the supraoccipital. The basicranium has well defined, short basipterygoid processes that project ventral to the basal tubera. The basisphenoid is expanded, projects posteroventrally, and is pierced by four pneumatic recesses. The endocranial morphology resembles that observed in other basal theropods—in particular some allosauroids—and has a strongly marked pontine flexure and a large dorsal expansion. The inner ear morphology is also similar to that observed in other basal theropods, with slender semicircular canals. The anterior semicircular canal is 20% larger than the posterior semicircular canal, and the angle formed between them is less than 90° when seen in dorsal view.XING Lida Ariana PAULINA-CARABAJAL Philip J.CURRIE XU Xing ZHANG Jianping WANG Tao Michael E.BURNS DONG Zhiming 2014Acta Geologica Sinica(English Edition)2014,88,6:2
2云南早侏罗世—新具嵴冠兽脚类恐龙(英文)显示文摘报道了具嵴冠的兽脚类恐龙一新属种,安龙堡双柏龙(Shuangbaisaurus anlongbaoensis gen.et sp.nov.)。双柏龙发现于云南省楚雄彝族自治州双柏县下侏罗统冯家河组中,保存了部分头骨带下颌。双柏龙沿两侧眼眶背缘向上有嵴冠发育,这在其他兽脚类中未曾报道过。与其他早侏罗世体型较大且具一对矢状嵴冠的兽脚类(双嵴龙属和中国龙属)相比,双柏龙还独具一些特征组合,如相对较高的前颌骨体、抬高的前颌骨腹缘、后腹向延伸的轭骨后突及较小的上颞孔。比较研究表明,尽管中国'双嵴龙'('Dilophosaurus'sinensis)可能应归入中国龙属(Sinosaurus),但未必属于模式种。双柏龙的发现将有助于研究基干兽脚类的演化,尤其是各类头骨骨饰在其中的作用。王国付 尤海鲁 潘世刚 王涛 2017古脊椎动物学报2017,55,2:1
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