The Triassic and Early Jurassic periods were the time periods in which dinosaurs first appeared. Learn more about the Triassic and Early Jurassic dinosaurs, such as the Lufengosaurus, Massospondylus, and Scutellosaurus.
Massospondylus was a medium-size prosauropod that lived in what is now modern-day North America and Africa. Its proportions suggest that it probably was able to stand up on its hind legs. What else is known about this dinosaur?