Encourage your child's imagination and creative play with CollectA Acrocanthosaurus Dinosaur with Movable Jaw Green. Acrocanthosaurus means 'high-spined lizard'. It was a large theropod that lived in the Early Cretaceous period in the USA and Canada. Acrocanthosaurus was known for its high neural spines on its neck, back and tail. It is believed the spikes may have formed a low sail or supported muscle and flesh. This hand-painted dinosaur toy looks lifelike and realistic. Designed by experts, CollectA dinosaur models are factually accurate and true to life.