A new record of hadrosaur, Jiayinosauropus johnsoni ichnogen. et ichnosp. nov., was established on the basis of a well preserved footprint. The specimen was collected from the Yong’ancun Formation of Jiayin Group of ...A new record of hadrosaur, Jiayinosauropus johnsoni ichnogen. et ichnosp. nov., was established on the basis of a well preserved footprint. The specimen was collected from the Yong’ancun Formation of Jiayin Group of early Late Cretaceous. The site is situated on the right bank of the Heilongjiang River, near Jiayin County, Heilongjiang Province. It was a pedal impression of a hadrosaur. It appeared a broadly tridactyl foot and possessed wide and thick digital. There are webs between the digits. The first hadrosaur, Mandschurosaurus amurensis (Riabinin, 1925,1930), was reported on the south bank of Heilongjiang River. It showed that the duck-bill dinosaurs existed in the region during the Cretaceous age. This footprint, Jiayinosauropus , is the first record of hadrosaur footprint in China.展开更多
文摘A new record of hadrosaur, Jiayinosauropus johnsoni ichnogen. et ichnosp. nov., was established on the basis of a well preserved footprint. The specimen was collected from the Yong’ancun Formation of Jiayin Group of early Late Cretaceous. The site is situated on the right bank of the Heilongjiang River, near Jiayin County, Heilongjiang Province. It was a pedal impression of a hadrosaur. It appeared a broadly tridactyl foot and possessed wide and thick digital. There are webs between the digits. The first hadrosaur, Mandschurosaurus amurensis (Riabinin, 1925,1930), was reported on the south bank of Heilongjiang River. It showed that the duck-bill dinosaurs existed in the region during the Cretaceous age. This footprint, Jiayinosauropus , is the first record of hadrosaur footprint in China.
文摘鸭嘴龙科(Hadrosauridae)化石根据头骨特征等被划分为鸭嘴龙亚科(Hadrosaurinae,无头冠)和赖氏龙亚科(Lambeosaurinae,有头冠)。黑龙江嘉荫龙骨山晚白垩世渔亮子组保存了丰富的鸭嘴龙化石,其中黑龙江满洲龙Mandschurosaurus amurensis(Riabinin,1925)是最早在中国发现的恐龙,属鸭嘴龙亚科;嘉荫卡龙Charonosaurus jiayinensis(Godefroit et al,2000)也是在这里发现的,属赖氏龙亚科。本文描述了采自嘉荫龙骨山的部分左齿骨化石和一些牙齿化石,新的化石明显属于鸭嘴龙亚科,主要特征为:齿骨每个牙列有5个以上的牙齿,牙冠边缘小锯齿由乳头状小瘤构成。新发现的牙齿牙冠上发育有明显的第二、三副脊,这在鸭嘴龙中是罕见的。新发现的化石明显不同于产于同一地点的嘉荫卡龙,但由于黑龙江满洲龙模式标本没有保存牙齿,因此暂不能与之充分对比。
