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9篇 您的检索式:作者名="J.Currie"
    题名 作者 年代 出处 被引量
1An Unusual, Three-Dimensionally Preserved, Large Hadrosauriform Pes Track from 'Mid'-Cretaceous Jiaguan Formation of Chongqing, China显示文摘Three-dimensional tracks provide unique insights into the locomotor mechanics of their track makers. An isolated, large hadrosauriform print attributable to Caririchnium lotus from the 'mid'-Cretaceous Lotus track site (Jiaguan Formation) in China permits reconstruction of the footfall, weight-bearing, and kick-off phases of the step cycle. Large-scale modifications of the pes during the step cycle indicate C. lotus trackmakers were capable of locomotory modifications in response to substrate consistency beyond the 'expected' shift between bipedal and quadrupedal postures. An unusual curvature to the trace of one of the outer digits indicates substantial transverse mobility. The remaining digits demonstrate lesser degrees of transverse movement accompanied by extension of the digits during footfall. The absence of overprinted scale-scratch marks and toe drags are consistent with a vertical kick-off of the pes and concomitant flexion of the digits. This track suggests that pedal mobility in C. lotus track makers was greater than previously suspected and has implications for reconstructions of hadrosauriform locomotion.XING Lida Phil R.BELL JeraldD.HARRIS Philip J.CURRIE 2012Acta Geologica Sinica(English Edition)2012,86,2:6
2Braincase 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
3Dragon Tails:Convergent Caudal Morphology in Winged Archosaurs显示文摘In the tails of dromaeosaurid dinosaurs and rhamphorhynchid pterosaurs, elongate osteological rods extend anteriorly from the chevrons and the prezygapophyses. These caudal rods are positioned in parallel and are stacked dorsoventrally. The fully articulated and three-dimensionally preserved caudal series of some dromaeosaurid specimens show that individually these caudal rods were flexible, not rigid as previously thought. However, examination of the arrangement of the caudal rods in cross-section indicates that the combined effect of multiple caudal rods did provide substantial rigidity in the dorsoventral, but not in the lateral, plane. The results of digital muscle reconstructions confirm that dromaeosaurids and rhamphorhynchids also shared greatly reduced caudofemoral muscles in the anterior tail region. The striking similarities between the tails of dromaeosaurids and rhamphorhynchids suggest that both evolved under similar behavioral and biomechanical pressures. Combined with recent discoveries of primitive deinonychosaurs that phylogenetically bracket the evolution of dromaeosaurid caudal rods between two arboreal gliding/flying forms, these results are evidence that the unique caudal morphologies of dromaeosaurids and rhamphorhynchids were both adaptations for an aerial lifestyle.W.Scott PERSONS IV Philip J.CURRIE 2012Acta Geologica Sinica(English Edition)2012,86,6:1
4董氏中华盗龙(兽脚类:异特龙超科)脑颅新知:筛区、颅腔解剖和具气腔(英文)显示文摘董氏中华盗龙(Sinraptor dongi) 是产自中国西北部新疆侏罗纪石树沟组上部的一种大型兽脚类。其正型标本包括了保存完好的脑颅,这是在最近的化石修理中额外发现的。脑颅中骨化筛骨的横切面为 U 形。在脑颅的解剖方位,蝶筛骨和眶蝶骨之间有一未骨化空间,表明该恐龙存活时具有软骨质的中隔蝶骨。利用乳胶颅腔模型和 CT 扫描技术对颅腔和含气隐窝的形态进行了研究,发现了一些此前未描述过的特点。其中尤为引人注目的是,发育良好的尾鼓室隐窝[一般认为是虚骨龙类(coelurosaurs) 的典型特征]以及基蝶骨隐窝和相关气腔的内部形态。侧鼓室隐窝和基蝶骨隐窝有纵向通道连接,很可能同时具有气腔和血管功能。模型也表明,颅腔没有髓质隆起,小脑绒球隐窝的开孔为沙漏状。若不包含嗅束和嗅球,颅腔容积为 95 ml,脑容商在其他基干坚尾龙类( tetanurans) 的范围内。虽然这些类群的第Ⅱ-Ⅳ对脑神经相对位置各有差异,但前脑、中脑和后脑之间的角度与鲨齿龙类( carcharodontosaurids) [鲨齿龙(Carcharodontosaurus) 及南方巨兽龙(Giganotosaurus) ]相似。第Ⅸ,Ⅹ和Ⅺ对脑神经穿过一个半月形的孔。在异特龙超科( Allosauroidea) 中,中华盗龙(Sinraptor) 在颅腔形态上与鲨齿龙、南方巨兽龙和异特龙( Allosaurus) 的相似程度比它与高棘龙(Acrocanthosaurus) 的相似程度更高。Ariana PAULINA CARABAJAL Philip J.CURRIE 2012古脊椎动物学报2012,50,2:1
5Model-Based Identification of Mechanical Characteristics of Sinosaurus(Theropoda) Crests显示文摘The paired cranial crests of Sinosaurus(Theropoda) have been hypothesized as too weak to resist mechanical loads during combat. Finite element analysis(FEA) is used to test this hypothesis, first with geometry obtained through direct laser scanning of a well-preserved fossil of the crest, and then with two conceptual FE models of both crests analyzing the structure-deformation effects of fenestration. In the original fossil model, under direct loading on the dorsal faces of the crest, we found that the areas surrounding cavities on the crest experience shear stress that implies a high chance of material failure – the fracture of bone. In the conceptual model, a series of computational studies were conducted with varying loading directions. One simulation found that the shear stress and strain in the material around the cavity presented more deformation compared with the conceptual model without the cavities, and under this morphologically realistic scenario the loading conditions would result in local bone fractures. These model-based computational results indicate that the crest could not resist high loads, because it could not effectively decentralize the loading stress. Future investigations need to focus on more comprehensive computational experiments with more conditions, e.g. dynamical loading conditions, and direct palaeontological evidence.XING Lida WANG Yikun Eric SNIVELY ZHANG Jianping DONG Zhiming Michael E.BURNS Philip J.CURRIE 2015Acta Geologica Sinica(English Edition)2015,89,1:1
6Melioidosis epidemiology and risk factors from a prospective whole‐population study in northern Australia显示文摘Bart J.Currie Susan P.Jacups Allen C.Cheng Dale A.Fisher Nicholas M.Anstey Sarah E.Huffam Vicki L.Krause 2004Tropical Medicine & International Health2004,,:1
7加拿大不列颠哥伦比亚省温哥华岛纳奈莫群的帆翼龙类化石(英文)显示文摘An unusual jaw found in a calcite nodule from Collishaw Point,Hornby Island,British Columbia(off the east coast of Vancouver Island)represents the first definitiveVictoria M.ARBOUR Philip J.CURRIE 2010地球学报2010,31,S1:0
8白垩纪中期琥珀中保存的一段具有原始羽毛的恐龙尾部显示文摘本文描述了一件保存在白垩纪中期(约9900万年前)缅甸琥珀中的非鸟兽脚类带羽尾部,其中的羽毛结构展现出了羽毛的演化过程。邢立达 Ryan C.Mc Kellar Xing Xu Gang Li Ming Bai W.Scott Persons IV Tetsuto Miyashita Michael J.Benton Jianping Zhang Alexander P.Wolfe Qiru Yi Kuowei Tseng Hao Ran Philip J.Currie 2017科学新闻2017,19,4:0
9The Shishugou Fauna of the Middle-Late Jurassic Transition Period in the Junggar Basin of Western China显示文摘The Middle-Late Jurassic transition period is a critical period for the evolution of terrestrial vertebrates,but the global fossil record from this time is relatively poor.The Shishugou Fauna of this period has recently produced significant fossil remains of dinosaurs and other vertebrate groups,some representing the earliest known members of several dinosaurian groups and other vertebrate groups and some representing the best-known specimens of their group.These discoveries are significant for our understanding of the origin and evolution of several vertebrate lineages.Radiometric dating indicates that the fauna is aged approximately 159-164 Ma.Comparisons with other similarly-aged terrestrial faunas such as Shaximiao and Yanliao show both taxonomic similarities and differences between these faunas and indicate that the Junggar deposits might have preserved the most complete vertebrate fossil record for a Middle-Late Jurassic Laurasian terrestrial fauna.XU Xing James M.CLARK David A.EBERTH Philip J.CURRIE 2022Acta Geologica Sinica(English Edition)2022,96,4:0
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