Ornithischians or 'bird-hipped dinosaurs' comprise the order Ornithischia, and these animals make up one of the two dinosaur orders (the other order is the Saurischia). These animals lived fron the Late Triassic through to the end of the Cretaceous periods, and their remains have been found in all continents of the world. They were herbivores with bird-like hip bones, a horny bill or beak, leaf-shaped teeth, bony tendons along the spine, and other features. Confusingly, it is not thought that birds evolved from this group of dinosaurs.
The family tree on this page shows how the ornithischian dinosaurs
were related to one another. Ornithischians included the ornithopods,
stegosaurs, ankylosaurs
and ceratopsians. Numbers represent
millions of years before the present era.
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