Xunmenglong

Xunmenglong (from ) is a genus of compsognathid theropod dinosaur from the Huajiying Formation from Hebei Province in China. The type and only species is Xunmenglong yinliangis. The holotype material consists of a pelvis, tail base and hindlimbs that had previously been part of a chimera containing three different animals. The animal is described as being the smallest known member of Compsognathidae, being about the size of the sub-adult Scipionyx holotype specimen or approximately 0.5 meters (1.6 feet) in length.

Classification
In the original description, Xunmenglong is recovered as a Compsognathid in a polyomy including Compsognathus, Huaxiagnathus, and Juravenator. However, Andrea Cau (2024) recovered Xunmenglong not as a Compsognathid, but instead as a basal member of Tetanurae.