An Early Cretaceous Avialian Bird, Shenzhouraptor sinensis from Western Liaoning, China

摘要

This paper describes an avialian bird from the Early Cretaceous Jiufotang Formation in Yixian county, western Liaoning China, which is named as Shenzhouraptor sinensis by Ji et al. on July 15, 2002. Shenzhouraptor sinensis is characterized by no teeth in its mouth, the forelimbs longer than the hindlimbs, a long tail with more than 23 caudal vertebrae, U-shaped wishbone, and remiges longer than the total length of ulna and manus. It is certain that the new avialian bird is really capable of powerful flight, representing a missing link between theropod dinosaurs and birds.