古脊椎动物学报2009，Vol.47Issue(3)：178-193,16.
记贵州关岭生物群中的大型鱼龙Shastasaurus
ON THE OCCURRENCE OF THE ICHTHYOSAUR SHASTASAURUS IN THE GUANLING BIOTA (LATE TRIASSIC) , GUIZHOU, CHINA
摘要
Abstract
A completely articulated ichthyosaur skeleton from the Guanling biota, Guizhou is described. The well preserved postcranial skeleton demonstrates that Guizhouichthyosaurus tangae, a large Triassic ichthyosaurid species previously described from Guizhou, should be referred to Shastasaurus. Enough materials were found to make possible a satisfactory determination of the systematic position of the large Guanling ichthyosaur species, although both the genus Shastasaurus and the family Shastasau-ridae have long been hard to define due to the fragmentary nature of the type specimens. The postcranial characters of Shastasaurus tangae are described in detail based on the new skeleton, the holotype of Guizhouichthyosaurus tangae and other associated Guanling large iehthyosaur materials. The trunk is very long, with more then 60 presacral vertebrae and a ventraliy bent tail. The scapula is broad and sickle-shaped. The humerus is anteriorly notched with a short shaft. The radius is nearly rectangular, with a small notch in the anterior edge, and a very slightly concave posterior edge. The ulna is much smaller than the radius, with a slightly concave anterior edge and bluntly rounded posterior and distal edge. The forefin and hindfin have four principal digits.关键词
贵州关岭生物群/晚三叠世/萨斯特鱼龙(Shastasaurus)Key words
Guizhou/ Guanling biota/ Late Triassic/ Shastasaurus分类
生物科学引用本文复制引用
尚庆华,李淳..记贵州关岭生物群中的大型鱼龙Shastasaurus[J].古脊椎动物学报,2009,47(3):178-193,16.基金项目
国家重点基础研究发展规划项目(编号:2006CB806400)、现代古生物学和地层学国家重点实验室(中国科学院南京地质古生物研究所)(编号:063105)和国家自然科学基金项目(编号:40872019)资助.This study was financially supported by the State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS) (No. 063105), by the Major Basic Research Projects (2006CB806400) of MST of China and by the National Natural Science Foundation of China (Grant no. 40872019). （编号:2006CB806400）
