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四川犍为晚侏罗世一新的肉食龙类
引用本文:李飞,彭光照,叶勇,江山,黄大喜.四川犍为晚侏罗世一新的肉食龙类[J].地质学报,2009,83(9):1203-1214.
作者姓名:李飞  彭光照  叶勇  江山  黄大喜
作者单位:自贡恐龙博物馆,四川自贡,643013
基金项目:本项目由乐山市国土资源局提供资金支持
摘    要:记述了四川盆地西南部晚侏罗世上沙溪庙组顶部的中国盗龙型肉食龙类化石材料,并依此建立一新属新种——犍为乐山龙 (Leshansaurus qianweiensis gen. et sp. nov.)。它以上枕骨中嵴呈尖峰状,额骨最大长度与最大宽度之比约2.86,基蝶骨之基翼骨突细长,环椎间椎体马蹄形,背椎横突相当细长,背椎和荐椎神经棘非常薄,荐椎椎体具有明显的腹嵴,肠骨内侧髋臼缘存在一明显的嵴等特征区别于其他肉食龙类。犍为乐山龙是目前所知四川盆地产出层位最高的肉食龙材料,它的发现扩大了肉食龙类的时代分布和地理分布,对探讨肉食龙的演化具有比较重要的意义。

关 键 词:四川犍为  上沙溪庙组  晚侏罗世  肉食龙类
收稿时间:2008/10/23 0:00:00
修稿时间:2009/7/11 0:00:00

A NEW CARNOSAUR FROM THE LATE JURASSIC OF QIANWEI, SICHUAN, CHINA
li fei,Peng guang-zhao,Ye yong,Jiang shan and Huang da-xi.A NEW CARNOSAUR FROM THE LATE JURASSIC OF QIANWEI, SICHUAN, CHINA[J].Acta Geologica Sinica,2009,83(9):1203-1214.
Authors:li fei  Peng guang-zhao  Ye yong  Jiang shan and Huang da-xi
Institution:Zigong Dinosaur Museum,Zigong Dinosaur Museum,Zigong Dinosaur Museum,Zigong Dinosaur Museum,Zigong Dinosaur Museum
Abstract:Based on new material from the top of the Late Jurassic Shangshaximiao Formation of Xiaogu, Qianwei County, southwestern Sichuan Basin, a new sinraptorid carnosaur Leshansaurus qianweiensis gen. et sp. nov. is erected. It is distinguished from other carnosaurs by supraoccipital with a sharp midline ridge; relatively longer frontal with a ratio of the maximum length to the maximum width about 2.86; basipterygoid processes of basisphenoid slender; atlantal intercentrum horseshoe-shaped; diapophyses of dorsal vertebrae relatively slender; neural spines of dorsal and sacral vertebrae very thin; ventral keel of sacral vertebrae distinctly defined; ilium with a conspicuous ridge medially along acetabular edge. This new dinosaur was the latest carnosaur presently known in Sichuan Basin. Its discovery extends the horizontal and geographical distributions of the carnosaurs in Sichuan Basin, and is significant in the evolution of the carnosaurs.
Keywords:Qianwei  Sichuan  Shangshaximiao Formation  Late Jurassic  Sinraptorid carnosaur
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