河南汝阳盆地早白垩世晚期禽龙类化石的发现及其地层学意义

The discovery of iguanodontid dinosaur from the late Early Cretaceous strata of Ruyang Basin,Henan and its stratigraphic significance

记述了产自河南汝阳盆地早白垩世晚期相互关联的禽龙类9个中前部尾椎椎体化石。由于化石只保存不完整的尾椎部分,其属种难以断定。但它的发现说明,汝阳巨型蜥脚类恐龙动物群中,除了植食性的大型蜥脚类恐龙外,也存在大型鸟脚类恐龙——禽龙类。保存的尾椎椎体系列与发现于比利时的早白垩世贝尼萨尔禽龙相比,不论是大小还是形态构造上均极为相似,从而判断这9个连续的尾椎体分别为第7到第15尾椎。进而推断,河南汝阳盆地产出巨型蜥脚类恐龙动物群化石的沉积地层形成于早白垩世晚期。

Nine nearly articulated anteromiddle caudal vertebrae from the late Early Cretaceous strata of the Ruyang Basin, Henan Province are described. Due to the incompleteness of the caudal series, it is difficult to determine the exact genus and species; never- theless, their discovery indicates that, besides the herbivorous gigantic sauropod dinosaurs among the Ruyang Gigantic Sauropod Di- nosaur Fauna, there is also a large-sized omithopod iguanodontid dinosaur. The preserved caudal series is similar to that of Belgian Iguanodon bernissartensis in size and morphology. It is estimated that these 9 caudal vertebrae belong to the 7th to 15th caudal verte- brae, and it is further inferred that the Ruyang Gigantic Sauropod Dinosaur Fauna-bearing strata belong to the late Early Cretaceous.