What dinosaurs lived in the mesozoic era?

Answer:
The first dinosaurs evolved in the Mesozoic. At the end of the Mesozoic, all non avian dinosaurs became extinct. Therefor, all non avian dinosaurs, and some avian dinosaurs (birds), lived in the Mesozoic.
First answer by TexAlex94. Last edit by TexAlex94. Contributor trust: 63 [recommend contributor recommended]. Question popularity: 2 [recommend question].