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.
出处
《地质论评》
CAS
CSCD
北大核心
2005年第4期458-462,i0004,共6页
Geological Review
