Tooth loss and alveolar remodeling in Sinosaurus triassicus (Dinosauria: Theropoda) from the Lower Jurassic strata of the Lufeng Basin, China  

作　　者：XING LiDa BELL Phil R ROTHSCHILD Bruce M RAN Hao ZHANG JianPing DONG ZhiMing ZHANG Wei CURRIE Philip J 

机构地区：[1]Department of Biological Sciences, University of Alberta [2]School of the Earth Sciences and Resources, China University of Geosciences [3]Pipestone Creek Dinosaur Initiative [4]Division of Vertebrate Paleontology, Natural History Museum and Biodiversity Research Institute, University of Kansas [5]Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education [6]Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences [7]Department of Computer Engineering, Chengdu Electromechanical College

出　　处：《Chinese Science Bulletin》2013年第16期1931-1935,共5页

摘　　要：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 Jurassic 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 injury and subsequent tooth loss were non-fatal in this individual.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 Jurassic 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 injury 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 

分 类 号：S915[农业科学—水产科学]