A New Basal Sauropod Dinosaur from the Lufeng Basin,Yunnan Province,Southwestern China  

作　　者：LU Junchang Yoshitsugu KOBAYASHI LI Tianguang ZHONG Shimin 

机构地区：[1]Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China [2]Hokkaido University Museum, Hokkaido University, Sapporo, Hokkaido, 060-0810 Japan [3]Chuxiong Museum, Chuxiong, Yunnan 675000, China

出　　处：《Acta Geologica Sinica(English Edition)》2010年第6期1336-1342,共7页地质学报（英文版）

基　　金：sponsored by the Scientific Research Foundation for the Returned Overseas Chinese Scholars,State Education Ministry;the Key Laboratory of Stratigraphy and Paleontology,Chinese Academy of Geological Sciences (KL05-5);the Natural Science Foundation of China (40872017);a Hokkaido University Museum, Hokkaido University,Japan to Lü J.C.

摘　　要：A new dinosaur Chuxiongosaurus lufengensis gen.et sp.nov.is erected based on a nearly complete skull.The taxon is characterized by the lacrimal perpendicular to the ventral margin of the upper jaw,which is similar to that of Thecodontosaurus;a depression present on the dorsal profile of the snout behind the naris;the rostral profile of the maxilla slopes continuously towards the rostral tip;and the presence of 25 dentary teeth.It also displays prosauropod characters such as a relatively long skull,the slope of the maxillary rostral profile,and teeth that do not have basically constricted crowns.The new specimen is more basal than Anchisaurus and represents the first basal sauropod dinosaur from the Early Jurassic of China.A new dinosaur Chuxiongosaurus lufengensis gen.et sp.nov.is erected based on a nearly complete skull.The taxon is characterized by the lacrimal perpendicular to the ventral margin of the upper jaw,which is similar to that of Thecodontosaurus;a depression present on the dorsal profile of the snout behind the naris;the rostral profile of the maxilla slopes continuously towards the rostral tip;and the presence of 25 dentary teeth.It also displays prosauropod characters such as a relatively long skull,the slope of the maxillary rostral profile,and teeth that do not have basically constricted crowns.The new specimen is more basal than Anchisaurus and represents the first basal sauropod dinosaur from the Early Jurassic of China.

关 键 词：taxonomy Chuxiongosaurus lufengensis SAUROPODA JURASSIC Yunnan southwestern China 

分 类 号：Q915.864[天文地球—古生物学与地层学] Q915.87[生物学—古生物学]