Chaoyangsauridae A clade in the dinosaur family tree. The entries below are classified within it. Hualianceratops 160 Mya · Asia Yinlong 158 Mya · China Chaoyangosaurus 152.2–132.6 Mya Xuanhuaceratops 150.8–145.5 Mya · China Chaoyangsaurus 148 Mya · China Stenopelix valdensis 140 Mya · Asia