How are dinosaurs classified?

Dinosauria Classification Table

Order: Ornithischia

Suborders:

Ankylosauria
Certaopsia
Ornithopoda
Stegosauria

Order: Saurischia

Suborders:

Theropoda

Infraorders:

Carnosauria
Coelurosauria
Deinonychosauria
Ornithomimosauria
Segnosauria

Sauropodamorpha

Infraorders:

Prosauropoda
Sauropoda

Also see: What is a dinosaur?