中文摘要：

中国甘肃省酒泉地区公婆泉盆地下白垩统新民堡群的恐龙化石主要由1992年中日丝绸之路恐龙考察计划和1997-2000年中美马鬃山恐龙考察计划发掘和研究。先后发现的恐龙包括兽脚类、蜥脚类、禽龙类和新角龙类等。这一新的公婆泉恐龙组合的主要特征是同时包含了在晚白垩世占主导地位的几类恐龙的基干分子，如戈壁巨龙（Gobititan）是巨龙型类的基干分子，马鬃龙（Equijubus）是鸭嘴龙型类的基干分子，而古角龙（Archaeoceratops）和黎明角龙（Auroraceratops）是新角龙类的基干分子。公婆泉恐龙组合的另一特征是其某些成员的体型较大，如似鸟龙类和镰刀龙类恐龙是同期同类中最大的。比较研究发现，公婆泉盆地新民堡群的恐龙和辽西热河群的恐龙关系密切，但前者的整体来说要比后者进步。考虑到公婆泉盆地新民堡群的时代（Albian）较辽西热河群（Hauterivian晚期-Aptian早期）晚，公婆泉恐龙组合似应代表中国北方早白垩纪鹦鹉嘴龙恐龙动物群进化过程中较进步的一个阶段。

英文摘要：

Dinosaurs from the Lower Cretaceous Xinminpu Group of the Gongpoquan Basin in the Jiuquan area, Gansu Province, northwestern China were mainly excavated during the course of two projects： the Sino- Japanese Silk Road Dinosaur Expedition in 1992, and the Sino-American Mazongshan Dinosaur Project during 1997 - 2000. A diverse dinosaur assemblage, including members of Theropoda, Sauropoda, Iguanodontoidea, and Neoceratopsia, has since been discovered. This Gongpoquan dinosaur assemblage is characterized by the coexistence of basal representatives of the diverse clades that would subsequently dominate the Late Cretaceous dinosaur faunas, such as two basal neoceratopsians Archaeoceratops oshimai and Auroraceratops rugosus, the basal hadrosauroid Equijubus normani, and the basal titanosauriform Gobititan shenzhouensis. This assemblage is also characterized by members of the Ornithomimosauria and Therizinosauroidea with unusually large body size （for this geological time interval）. Comparative study shows, although closely related, all dinosaurs from the Xinminpu Group in the Gongpoquan Basin are more derived than those from the Jehol Group in the western Liaoning Province in their respectively clades. Considering the younger age of the dinosaur-bearing Xinminpu Group （Albian） in the Gongpoquan Basin than the Jehol Group in western Liaoning Province （late Hauterivian-early Aptian）, the Gongpoquan dinosaur assemblage probably represents a later, more derived stage in the evolution of Early Cretaceous Psittacosaurus-fauna in northern China.