吉林九台白垩系一新的蜥脚类恐龙  

A new sauropod dinosaur from the Cretaceous of Jiutai,Jilin,China

作　　者：吴文昊[1] 董枝明[1] 孙跃武[1] 李春田[1] 李涛[2] 

机构地区：[1]吉林大学古生物学与地层学研究中心,吉林长春130026 [2]吉林大学博物馆,吉林长春130026

出　　处：《世界地质》2006年第1期6-9,共4页World Geology

摘　　要：记述了蜥脚类恐龙(Sauropoda)中一新的属种—西地九台龙(Jiutaisaurusxidiensisgen.etsp.nov.),包括18个相关节的尾椎及13个脉弧。化石产于吉林九台白垩纪泉头组的紫色-杂色砂岩中。其主要特征为:中部尾椎椎体两侧出现前后延长的棱脊,前-中部尾椎双凹型,神经弓位于椎体前半部,脉弧不分叉,血管孔长度约占脉弧长度的1/2以上。新属种的发现对进一步研究白垩纪蜥脚类恐龙的系统演化、古地理分布等提供了新的材料。A new sauropod dinosaur, Jiutaisaurus xidiensis gen. et sp. nov. from the Cretaceous Quantou Formation exposed in Xidi village of Jiutai in Jilin, Northeast China, is described in this paper. The remains consist of a series of 18 articulated anterior and middle caudual vertebrae. It is distinguished from other sauropods in its possession of a longitudinal ridge on both sides of the middle caudal centra, amphicoelous anterior and middle caudals, chevrons unforked at their distal ends, and deep chevron haemal canal. The new material from Quantou Formation is significant for better understanding the evolution and distributions of Sauropoda in the Cretaceous.

关 键 词：恐龙 蜥脚类 九台龙 白垩纪 吉林九台 

分 类 号：P915.864[天文地球—自然地理学]