What are dinosaur types?

What are dinosaur types? There are two main types of dinosaur: saurischia and ornithischia. It was English paleontologist Harry Seeley who first noticed that were two main types of dinosaur: those whose hips were lizard-like in structure, and those whose hips bird-like in structure.

There are two main types of dinosaur: saurischia and ornithischia. It was English paleontologist Harry Seeley who first noticed that were two main types of dinosaur: those whose hips were lizard-like in structure, and those whose hips bird-like in structure.
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