Huayangosauridae A clade in the dinosaur family tree. The entries below are classified within it. Baiyinosaurus baojiensis 174–163 Mya · China Huayangosaurus 170.3–163.5 Mya · North America Isaberrysaura 168 Mya · Argentina Bashanosaurus primitivus 167.5–164.5 Mya · China Gigantspinosaurus 163.5–157.3 Mya · China