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Miller stegosaurus jpg.jpg
Scientific classification
Kingdom Information
Kingdom Animalia
Phylum Information
Phylum Chordata
Class Information
Class Reptilia
Order Information
Superorder Dinosauria
Order Ornithischia
Sub-order Thyreophora
Infraorder Stegosauria
Family Information
Family Stegosauridae
Genus Information
Genus Stegosaurus
Species Information
Species S. armatus
S. longispinus
S. stenops
Population statistics
Conservation status Extinct

Stegosaurus (Greek: στέγος stegos, and σαῦρος sauros; "roof lizard") was a genus of dinosaurs characterized by large, flat bony plates along its back. Stegosaurus had the smallest brain size of any dinosaur, measuring no larger than a walnut.