Acrocanthosaurus was the largest terrestrial predator of North America during the Early Cretaceous.

It had unusually high spines on its vertebrae that produced a tall thick ridge that ran the full length of its spinal column. A bipedal carnivore, it had a large, long head (4-5 ft) with a mouth filled with many thin, serrated teeth.

Dino Facts

  • Pronounced: ak-ro-KANTH-uh-SAWR-us
  • Means: High-spine lizard
  • Size: Up to 38 ft (11.5 m)
  • Where: North America (Oklahoma, Texas, Wyoming)
  • When: Early Cretaceous
  • Diet: Carnivorous (large dinosaurs)