Dongbeititan dongi,the First Sauropod Dinosaur from the Lower Cretaceous Jehol Group of Western Liaoning Province,China  

作　　者：WANG Xuri YOU Hailu MENG Qingjin GAO Chunling CHENG Xiaodong LIU Jinyuan 

机构地区：[1]Dalian Natural History Museum, Dalian, Liaoning Province, China [2]Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China

出　　处：《Acta Geologica Sinica(English Edition)》2007年第6期911-916,共6页地质学报（英文版）

基　　金：Funding was provided by the Bureau of Dalian Science and Technology,the Ministry of Science and Technology of China(973 Project:2006CB701405);the National Natural Science Foundation of China(40672007);the Hundred Talents Project of the Ministry of Land and Resources of China.

摘　　要：We herein describe a partial postcranial skeleton of a sauropod dinosaur recovered from the Lower Cretaceous Jehol Group in the Beipiao area of western Liaoning Province, northeastern China. A suite of features it possesses, including the camellate internal structure of its presacral elements, the existence of pneumatocoels on the proximal ends of the dorsal ribs, and especially the medially deflected proximal portion of the femur, definitively establish the titanosauriform affinities of the specimen. It differs from other titanosauriforms in having a craniocaudally elongate coracoid with a squared cranioventral extreme and a long, smooth, and slightly convex acetabular edge of the pubis. It represents a new taxon, Dongbeititan dongi gen. et sp. nov. Comparative studies suggest that Dongbeititan is a basal titanosauriform, more derived than Euhelopus, Fusuisaurus, and Huanghetitan, but less derived than Gobititan and Jiutaisaurus. Dongbeititan represents the first sauropod dinosaur reported from the Lower Cretaceous Jehol Group of western Liaoning Province.We herein describe a partial postcranial skeleton of a sauropod dinosaur recovered from the Lower Cretaceous Jehol Group in the Beipiao area of western Liaoning Province, northeastern China. A suite of features it possesses, including the camellate internal structure of its presacral elements, the existence of pneumatocoels on the proximal ends of the dorsal ribs, and especially the medially deflected proximal portion of the femur, definitively establish the titanosauriform affinities of the specimen. It differs from other titanosauriforms in having a craniocaudally elongate coracoid with a squared cranioventral extreme and a long, smooth, and slightly convex acetabular edge of the pubis. It represents a new taxon, Dongbeititan dongi gen. et sp. nov. Comparative studies suggest that Dongbeititan is a basal titanosauriform, more derived than Euhelopus, Fusuisaurus, and Huanghetitan, but less derived than Gobititan and Jiutaisaurus. Dongbeititan represents the first sauropod dinosaur reported from the Lower Cretaceous Jehol Group of western Liaoning Province.

关 键 词：DINOSAURIA SAUROPODA TITANOSAURIFORMES Jehol Group Yixian Formation Lower Cretaceous Beipiao western Liaoning Province China 

分 类 号：Q915[天文地球—古生物学与地层学]