Stegosaurus ungulatus
"Covered Lizard"


Fossil Sizes:
Length from head to tail:
26-30 feet
Height: 9 feet
Weight: about 6,800 pounds

Diet: Herbivore
Habitat: Land
When: 156-140 Million Years Ago

Special Features: The Stegosaurus is known for its large size and strange appearance. Scientists believe that its plated back and spiked tail were used for protection or to control body temperature. The Stegosaurus spent most of its time searching for enough food to keep going. As a plant eater, the Stegosaurus ate things like ferns, mosses, cycads, horsetails, and conifers. The Stegosaurus had a toothless beak and small cheek teeth to help it eat all day long. Its skull was long, pointed, and narrow.

© Carnegie Museum of Natural History