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A New Theropod dinosaur from the Middle j.rassic of Lufeng,Yunnan,China

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Acta Geologica Sinica(English Edition) 2009年第1期83卷 9-24页

作者： WU Xiao-chun philip j. currie DONG Zhiming PAN Shigang WANG Tao Canadian museum of Nature Ottawa Canada Department of Biological Sciences University of Alberta Edmonton Canada Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences Beijing 100044 China Lufeng dinosaur museum Lufeng 651200 China

A new theropod dinosaur, Shidaisaurusj.nae gen. et sp. nov., has been described on the basis of an incomplete skeleton. The specimen was found near the base of the Upper Lufeng Formation （early Middle j.rassic） in Yunnan, China. It is the first theropod dinosaur from the Middle j.rassic of Yunnan. Shidaisaurus j.nae is distinguishable from other j.rassic theropods by certain features from the braincase, axis, and pelvic girdle. The absence of any pleurocoels in the axis or in any anterior dorsal vertebrae suggests that the new Lufeng theropod is relatively primitive and more plesiomorphic than most of the Middle to Late j.rassic theropods from China. Most Chinese taxa of j.rassic theropod dinosaurs have not been well described; a further detailed study will be necessary for us to determine their phylogenetic relationships with Shidaisaurusj.nae.

关键词： Shidaisaurus j.nae theropod dinosaur Upper Lufeng Formation Middle j.rassic,Lufeng Yunnan

Tooth loss and alveolar remodeling in Sinosaurus triassicus (dinosauria: Theropoda) from the Lower j.rassic strata of the Lufeng Basin, China

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Chinese Science Bulletin 2013年第16期58卷 1931-1935页

作者： XING LiDa BELL Phil R ROTHSCHILD Bruce M RAN Hao ZHANG j.anPing DONG ZhiMing ZHANG Wei currie philip j Department of Biological Sciences University of Alberta School of the Earth Sciences and Resources China University of Geosciences Pipestone Creek dinosaur Initiative Division of Vertebrate Paleontology Natural History Museum and Biodiversity Research Institute University of Kansas Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University) Ministry of Education Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences Department of Computer Engineering Chengdu Electromechanical College

Pathological or traumatic loss of teeth often results in the resorption and remodeling of the affected alveoli in mammals. However, instances of alveolar remodeling in reptiles are rare. A remodeled alveolus in the maxilla of the Chinese theropod Sinosaurus (Lower j.rassic Lower Lufeng Formation) is the first confirmed example of such dental pathology in a dinosaur. Given the known relationship between feeding behavior and tooth damage in theropods (teeth with spalled enamel, tooth crowns embedded in bone) and the absence of dentary, maxillary, and premaxillary osteomyelitis, traumatic loss of a tooth is most likely the cause of alveolar remodeling. Based on the extent of remodeling, the inj.ry and subsequent tooth loss were non-fatal in this individual.

关键词：下侏罗统兽脚类牙齿肺泡中国恐龙禄丰盆地地层

An Unusual, Three-Dimensionally Preserved, Large Hadrosauriform Pes Track from "Mid"-Cretaceous j.aguan Formation of Chongqing, China

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Acta Geologica Sinica(English Edition) 2012年第2期86卷 304-312页

作者： XING Lida Phil R.BELL j.raldD.HARRIS philip j.currie Department of Biological Sciences University of Alberta11455 Saskatchewan DriveEdmontonAlberta T6G 2E9Canada Key Laboratory of Evolutionary Systematics of Vertebrates Chinese Academy of SciencesPO Box 643100044 BeijingChina Pipestone Creek dinosaur Initiative ClairmontAlberta TOH OWOCanada. Physical Sciences Department Dixie State College225 South 700 EastSt.GeorgeUtah 84770USA

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 （j.aguan 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.

关键词： hadrosauriform locomotion footprints Cretaceous step cycle

The Shishugou Fauna of the Middle-Late j.rassic Transition Period in the j.nggar Basin of Western China

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Acta Geologica Sinica(English Edition) 2022年第4期96卷 1115-1135页

作者： XU Xing j.mes M.CLARK David A.EBERTH philip j.currie Centre for Vertebrate Evolutionary Biology Yunnan UniversityKunming 650500China Key Laboratory of Vertebrate Evolution and Human Origins Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of SciencesBeijing 100044China Department of Biological Sciences George Washington UniversityWashington DC20052USA Royal Tyrrell museum of Palaeontology Box 7500DrumhellerAlberta T0J 0Y0Canada Department of Biological Sciences University of Alberta 116 Street and 85 AvenueEdmontonAB T6G 2R3Canada

The Middle-Late j.rassic transition period is a critical period for the evolution of terrestrial vertebrates,but the global fossil record from this time is relatively *** 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 *** discoveries are significant for our understanding of the origin and evolution of several vertebrate *** dating indicates that the fauna is aged approximately 159-164 *** with other similarly-aged terrestrial faunas such as Shaximiao and Yanliao show both taxonomic similarities and differences between these faunas and indicate that the j.nggar deposits might have preserved the most complete vertebrate fossil record for a Middle-Late j.rassic Laurasian terrestrial fauna.

关键词： Middle-Late j.rassic Shishugou Fauna Shishugou Formation terrestrial ecosystem Shaximiao Yanliao j.nggar Basin