记黑龙江畔一鸭嘴龙足印化石

2002年9月，来自七个国家的地层古生物学者，在中国吉林省长春市吉林大学举行了“黑龙江流域白垩纪生物群及K／T界线国际学术研讨会”。会议之后学者们对黑龙江沿岸中新生界地层进行了实地踏勘，在踏勘的过程中在嘉荫县永安村之东南1．2km的黑龙江岸边发现了一滚石板，其上保存一较完整的大型恐龙足印。足印印迹在厚层钙质胶结的粗砂岩上，经查对化石产出岩层为嘉荫群永安村组(Sun et a1．，2003)。化石是一大型的三趾的足印(tridactyl)，三趾短粗，中趾呈U型，趾间有蹼的痕迹，造印者应是一只鸭嘴龙(Thulbom，1990)。黑龙江省嘉荫县是我国第一只命名的恐龙——黑龙江满洲龙(Mandschurosaurus amurensis)化石的产出地，化石产自嘉荫群渔亮子组(Riabinin，1925，1930；Dong，1992)。本文记述的标本是嘉荫群中发现的第一件足印化石，也是我国鸭嘴龙类足印化石的首次记录(甄朔南等，1996)。

NOTE ON A HADROSAUR FOOTPRINT FROM HEILONGJIANG RIVER AREA OF CHINA

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.