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Dinosaur classification

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Dinosaurs are divided into two orders, the Saurischia and the Ornithischia, on the basis of their hip structure.

These extinct animals are NOT dinosaurs! Plesiosaurs - Pterosaurs - Wooly Mammoths - Dimetrodon

Order Ornithischia

Main Article: Ornithischia (Bird-hipped)

Suborder: Thyreophora (armored dinosaurs)

Infraorder: Ankylosauria
* Ankylosauridae
* Nodosauridae
* Scelidosauridae
Infraorder: Stegosauria
* Huayangosauridae
* Stegosauridae

Suborder Cerapoda:

Infraorder: Ceratopsia
* Ceratopsidae (horned dinosaurs)
* Chaoyangsauridae
* Psittacosauridae
* Neoceratopsia
Infraorder: Ornithopoda (bird-footed)
* Hypsilophodontidae
* Iguanodontidae
* Hadrosauridae (duck-billed dinosaurs)
Infraorder: Pachycephalosauria
* Pachycephalosauridae
* Goyocephala [1]

Order Saurischia

Saurischia Pelvis
Main Article: Saurischia (lizard-hipped)

Suborder Sauropodomorpha

Infraorder Sauropoda
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Suborder Theropoda

Infraorder Prosauropoda


  1. Ornithischia by Wikispecies