"Yangchuanosaurus" means "Yongchuan lizard" (after the Yongchuan District in China where it was first found).
Yangchuanosaurus was a member of the Saurischia ("lizard-hipped") order of dinosaurs. What this means, is that although Yangchuanosaurus was not closely related to lizards, it did have similarly shaped pelvic bones.
Yangchuanosaurus was a Theropod - a member of a group of related bipedal dinosaurs that included the ancestors of birds (although Yangchuanosaurus was not itself an ancestor of birds).
Yangchuanosaurus lived between about 166 million years ago and 140 million years ago, during the late Jurassic and early Cretaceous periods.
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