论文部分内容阅读
记述了贵州兴义法郎组竹竿坡段幻龙一新种———Nothosaurusyoungisp .nov .。新种以眶后弓窄 ,上颌骨和眶后骨在轭骨之后相连 ,外翼骨形成明显的腹向凸缘 ,下颌具清晰的冠状突 ,和夹板骨前端进入下颌缝合部等特征区别于幻龙的其他种。支序分析的结果表明N .youngi的原始性仅次于N .juvenilis。新种N .youngi具有Nothosaurus中的一些原始特征 ,短的下颌缝合部 ,短的上颌齿列和窄的眶后弓 ,新种在法郎组竹杆坡段的发现支持含化石地层为中三叠世拉丁期的结论。
Describes the Guizhou Xingyi Franc group bamboo slope slope dragon a new species --- Nothosaurusyoungisp. Nov .. The new species is characterized by narrow orbital arch, maxilla and retro orbital bone connected after the yoke, external abdominal bone forming a clear abdominal flange, clear coronoid mandible, and the front of the splint into the mandibular suture and other characteristics are different from Other species of magic dragon. The result of the sequence analysis shows that N. youngi is second only to N. juvenilis. The new species N. youngi has some of the original features of Nothosaurus, short mandibular suture, short maxillary dentition and narrow retroorbital arch. The discovery of the new species in the bamboo-banded slope of the Franc group supports that the fossil- Latin conclusion.