论文部分内容阅读
在辽西义县组发现一大型禽龙类恐龙, 根据其头骨形态和牙齿特征建立一新属、新种——杨氏锦州龙(Jinzhousaurus yangi gen. et sp. nov.). 杨氏锦州龙某些特征比已知多数禽龙类原始, 但大部分特征接近于早白垩世的一些进步禽龙类, 如前上颌骨喙部中等扩大和牙齿形态及排列方式等. 锦州龙的另外一些特征非常接近鸭嘴龙类, 比如眶前孔不发育等. 锦州龙的这种奇特特征组合对于研究禽龙类的演化和鸭嘴龙类的起源具有重要意义. 锦州龙发现于义县组中部, 层位高于四合屯化石层, 是辽西热河生物群发现的第一个大型恐龙化石, 丰富了热河生物群的组成. 锦州龙的发现进一步证明了热河生物群的时代为早白垩世, 与同位素测年确定的年代一致.
A large dinosaur dinosaur was found in the Yixian Formation in western Liaoning Province. According to its skull morphology and tooth characteristics, a new genera and new species were found - Jinzhousaurus yangi gen. Et sp. Nov., Yangzhou Jinzhou Longmou Some of the features are more pronounced than those of the most primitive Iguanodon, but most of the features are close to the Early Cretaceous, such as the moderate enlargement of the maxillary beak and the morphology and arrangement of teeth, etc. Other features of the Jinzhou dragon are very Close to the dinosaur, such as the pre-orbital hole is not developed, etc. This unique combination of Jinzhou dragon for the study of the evolution of the Iguanodon and the origin of the duck bizarre has great significance.Jinzhou dragon found in the central part of the Yixian group Which is higher than that of Sihetun fossil, is the first large-scale dinosaur fossil found in the Rehe biota in western Liaoning and enriched the composition of Jehol biota. The discovery of Jinzhou dragon further proves that the age of Jehol biota was Early Cretaceous , Consistent with the dating of isotope dating.