地质学报（英文版）2008，Vol.82Issue(1)：17-26,10.
A New Mamenchisaurid Dinosaur from the Middle Jurassic of Yuanmou, Yunnan Province, China
A New Mamenchisaurid Dinosaur from the Middle Jurassic of Yuanmou, Yunnan Province, China
摘要
Abstract
A new mamenchisaurid dinosaur, Eomamenchisaurus yuanmouensis gen et sp. nov. Is erected based on an incomplete skeleton from the Zhanghe Formation, the Middle Jurassic of Yuanmou, Yunnan Province. The new taxon is characterized by absence of pleurocoels in dorsal vertebrae and the dorsal verterbrae with slightly convex anterior articular surfaces, moderately concave posterior articular surfaces; the fourth trochanter is developed posteromedially on the femur; length ratio of the tibia to the femur is approximately 0.64; and the shaft of the ischium is rod-like. Two fused centra of the posterior dorsal vertebrae (the presumed 9th and the 10th dorsal vertebrae) are similar to those in other mamenchisaurid dinosaurs, including Mamenchisaurus hochuanesis, M. youngi and Chuanjiesaurus anaensis. Therefore, fusion of centra of the ninth and the tenth dorsal vertebrae can be recognized as a synapomorphic character of the Mamenchisauridae.关键词
Eomamenchisaurus, Mamenchisauridae, Sauropoda, Middle Jurassic, Yunnan ProvinceKey words
Eomamenchisaurus, Mamenchisauridae, Sauropoda, Middle Jurassic, Yunnan Province分类
天文与地球科学引用本文复制引用
L(U) Junchang,LI Tianguang,ZHONG Shimin,JI Qiang ,LI Shaoxue..A New Mamenchisaurid Dinosaur from the Middle Jurassic of Yuanmou, Yunnan Province, China[J].地质学报（英文版）,2008,82(1):17-26,10.基金项目
This study was supported financially by a grant of the Key Laboratory of Stratigraphy and Paleontology,Chinese Academy of Geological Sciences (KL05-5)to Lü Junchang and the National Key Basic Research and Develpment Program (Grant 2006CB701405). （KL05-5）
