Ornithischia Dinosaur Biology

The Ornithischia dinosaur belongs to an order of herbivore dinosaurs. They are often called the bird-hipped dinosaurs. These prehistoric animals first appeared about 230 million years ago. Like the other dinosaurs, they became extinct during the K-T extinction event 66 million years ago.

The Ornithischia were able to walk in a two or four-legged manner.


The bird-hipped dinosaurs are vertebrates and belong to the phylum Chordata. They also belong to the clade Dinosauria and are true dinosaurs.

There are a number of Ornithischia subgroups. These include the:

Thyreophora: were the armored dinosaurs. Stegosaurus, Euoplocephalus and Talarurus were members of this group with distinctive body armor. Some like the Stegosaurus also had spikes and plates.

Ceratopsidae: were the horned dinosaurs that possessed beaks and horns. Triceratops and Pentaceratops are Ceratopsids.

Iguanodontia: were the beaked and duck-billed dinosaurs. Iguanodon, Edmontosaurus and Parasaurolophus belonged to this group.


Different species could be found on different continents. It is thought that they may have lived in more upland or river plains areas.

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Bird-Hipped Dinosaurs, BBC.


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3 comments on "Prehistoric Animals: the Ornithischia Dinosaurs"

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Webster Gabiana

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Ronand Abella

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