The Huayangosauridae were an early family of stegosaurs which lived during the Middle Jurassic. They were smaller than later stegosaurs and had shorter and higher skulls. Currently, the only confirmed genus included is the type genus "Huayangosaurus" of China. The poorly-known remains of "Regnosaurus" from England, however, indicate it too could be a member. Its lower jaw is very similar to the former. 