辽西义县组发现一新的翼手龙类化石  

New Pterodactyl oid Pterosaur from the Yixian Formation of Western Liaoning

作　　者：吕君昌[1] 张宝堃 

机构地区：[1]中国地质科学院地质研究所,北京100037 [2]北京自然博物馆,北京100050

出　　处：《地质论评》2005年第4期458-462,i0004,共6页Geological Review

摘　　要：根据产自中国辽宁省西部早白垩世义县组上部、具有不完整头骨的翼手龙类骨架确立一新属新种: 李氏始无齿翼龙Eopteranodon lii(gen.et sp.nov.)。从它窄长的头骨且其上、下颌尖长而没有牙齿,短的颈椎椎体上来看,显示了该翼龙与无齿翼龙类相似。始无齿翼龙的肱骨没有像其他无齿翼龙类那样具有弯曲的肱骨三角嵴, 而且几乎所有的无齿翼龙类均个体较大。始无齿翼龙的个体较小,两翼展宽约为1.1 m左右。腕骨没有愈合,肱骨三角嵴较平直以及第Ⅳ翼掌骨稍微长于尺骨显示了它的原始性,它代表一新的、较原始的、类似无齿翼龙的翼手龙类。New genus and species Eopteranodon lii （gen. et sp. nov. ） is erected based on a skeleton with incomplete skull from the Early Cretaceous upper part of the Yixian Formation of western Liaoning, China. Its elongated skull with toothless tips and short cervical vertebrae indicate that it is similar to that of Pteranodon. The humerus of Eopteranodon is different from that of Pteranodon in that the deltopectroal crest of humerus is not warped and almost all the Pteranodontids are large in size. Eopteranodon is small with a wing-span approximately 1.1 m. The unfused carpals, nearly straight deltopetoral crest of the humerus and metacarpal Ⅳ slightly longer than ulna indicate that it represents a new, more primitive pterodactyliod pterosaur, which may be similar to Pteranodon.

关 键 词：辽宁 白垩世 翼手龙类化石 牙齿 头骨形态 

分 类 号：Q915.2[天文地球—古生物学与地层学]