云南罗平中三叠世利齿滇东龙(鳍龙超目)—新材料  

A new specimen of Diandongosaurus acutidentatus(Sauropterygia) from the Middle Triassic of Yunnan,China

作　　者：刘学清[1] 林文彬[2] Olivier RIEPPEL 孙作玉[2] 李志广[2] 鲁昊[2] 江大勇[2] 

机构地区：[1]北京市地质矿产勘查开发局,北京100195 [2]北京大学地球与空间科学学院,北京100871 [3]美国芝加哥菲尔德博物馆综合研究中心,芝加哥il606052496

出　　处：《古脊椎动物学报》2015年第4期281-290,共10页Vertebrata Palasiatica

摘　　要：记述了产自云南省罗平县中三叠世安尼期关岭组上段一件近乎完整的利齿滇东龙(Diandongosaurus acutidentatus)新标本。根据该标本所提供的新信息,讨论了部分前人研究中不确定或者存在争议的骨骼特征,并重新厘定了滇东龙的鉴定特征。分支系统学分析表明滇东龙属于始鳍龙类,且与真鳍龙亚目的亲缘关系较近。A new nearly complete specimen of Diandongosaurus acutidentatus Shang et al., 2011 is described from the Upper Member of the Guanling Formation （Anisian, Middle Triassic） of Luoping, Yunnan Province. With the new information derived from the new specimen, some elemerits of the skeleton that were either uncertain or controversial in the previous studies are confirmed and discussed, and the diagnosis of D. acutidentatus is revised. The result of our phylogenetic analysis suggests that Diandongosaurus is an eosauropterygian, closely related to the Eusauropterygia.

关 键 词：云南罗平 中三叠世.始鳍龙类 利齿滇东龙 

分 类 号：Q915.864[天文地球—古生物学与地层学]