Ornithischian Dinosaurs

Explore several ornithischian lineages, including ornithopods and pachycephalosaurs as well as armored dinosaurs. Not all had armor or horns, and body structure, diet and movement differed. Distinguish each entry's fossils and discovery records from evidence used to infer ecology.

Published animal profiles

Triceratops
A latest-Cretaceous ceratopsian with three horns and a broad frill. Triceratops was a ceratopsian dinosaur living in Late Cretaceous North America. Its name refers to a three-horned face, taken from the long horns above the eyes and the horn above the nose.
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Stegosaurus
A stegosaur whose back plates and tail spikes merit separate attention. Stegosaurus was a stegosaurian dinosaur of the Late Jurassic. A representative herbivore known from North America's Morrison Formation, it did not live at the same time as the latest-Cretaceous Tyrannosaurus.
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