A New Eusauropod Dinosaur from the Lower Cretaceous of Guangxi Province,Southern China  

作　　者：MO Jinyou XU Xing Eric BUFFETAUT 

机构地区：[1]Faculty of Earth Sciences, China University ofGeosciences, Wuhan 430074, China [2]Natural History Museum of Guangxi, Nanning 530012, China [3]Institute of Vertebrate Paleontology and Paleoanthropology, Beijing 100044, China [4]CNRS, UMR 8538, Laboratoire de Geologie de l＇Ecole Normale Superieure, 24 rue Lhomond, 75231 Paris Cedex 05, France

出　　处：《Acta Geologica Sinica(English Edition)》2010年第6期1328-1335,共8页地质学报（英文版）

基　　金：supported by the National Natural Science Foundation of China to Mo Jinyou(40862001)and the Chinese Academy of Sciences to Xu Xing

摘　　要：A new sauropod dinosaur,Liubangosaurus hei gen.et sp.nov.,is erected based on a specimen represented by five articulated middle-caudal dorsal vertebrae,which was discovered in the Lower Cretaceous Napai Formation of Guangxi Province,southern China.This new taxon is diagnosed by a unique combination of derived features：prezygapophysis closely contacts with parapophysis,with the prdl and prpl absent;presence of cavity on the dorsal surface of the diapophysis;neural spine very low,with its distal end level with that of diapophysis;distal end of the neural spine strongly expanded laterally to form a platform;marked fossa formed between the infradiapophyseal lamina and the parapophysis;broad,flat area of featureless bone on lateral surface of neural arch;vertically directed infradiapophyseal lamina expands or bifurcates ventrally to form a inverted ＂Y＂;highly positioned parapophyses large and tear-drop in shape.The discovery of this new taxon increases the diversity of sauropods in China during the Early Cretaceous.A new sauropod dinosaur,Liubangosaurus hei gen.et sp.nov.,is erected based on a specimen represented by five articulated middle-caudal dorsal vertebrae,which was discovered in the Lower Cretaceous Napai Formation of Guangxi Province,southern China.This new taxon is diagnosed by a unique combination of derived features：prezygapophysis closely contacts with parapophysis,with the prdl and prpl absent;presence of cavity on the dorsal surface of the diapophysis;neural spine very low,with its distal end level with that of diapophysis;distal end of the neural spine strongly expanded laterally to form a platform;marked fossa formed between the infradiapophyseal lamina and the parapophysis;broad,flat area of featureless bone on lateral surface of neural arch;vertically directed infradiapophyseal lamina expands or bifurcates ventrally to form a inverted ＂Y＂;highly positioned parapophyses large and tear-drop in shape.The discovery of this new taxon increases the diversity of sauropods in China during the Early Cretaceous.

关 键 词：Eusauropoda Liubangosaurus hei Napai Formation Early Cretaceous GUANGXI China 

分 类 号：Q915.864[天文地球—古生物学与地层学] P534.53[生物学—古生物学]