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Class: Sauropsida
which served as lungs
The fangs of Machairodus
a braincase
This is real fossil dinosaur bone from the Cretaceous of South Dakota
Allosaurus foot with base (Replica) Alamosaurus Class: SauropsidaAllosaurus (pronounced Al oh SAWR us) Allosaurus, meaning "different lizard," was a huge, meat eating dinosaur from the late Jurassic period, about 154 million to 144 million years ago. It was a theropod that lived in what is now the western United States. It was up to 40 feet long and weighed up to 4. 5 tons. The skull was nearly 3 feet long and filled with dozens of serrated razor sharp teeth. It was about 10 feet tall at the hip and had 3 clawed