Evolution of the Dinosaurs

Dinosaurs First Appear

What kinds of dinosaurs were in the ornithischian group?

The ornithischians were all herbivores and had two-and four-legged types. There were the four-legged armored dinosaurs such as Ankylosaurus and Stegosaurus. There were large, horned dinosaurs such as Eucentrosaurus and Triceratops. Two-legged types included Iguanodon, and many of the duck-billed dinosaurs (hadrosaurs), such as Corythosaurus, Lambeosaurus, and Maiasaura.


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