Acrocanthosaurus atokensis Scale:1:35 It is believed that this

It is believed that this crest was used for visual display during courtship and defense of territory

The feather pattern in Sinosauropteryx is remarkably similar to that of primitive birds

Functions and Adaptations: Defense and Competition:

which only had one functional finger

Studies indicate that

Acrocanthosaurus atokensis Scale:1:35 It is believed that thisAcrocanthosaurus atokensis is the only known species of the extinct genus Acrocanthosaurus, a carcharodontosaurid theropod dinosaur that inhabited North America during the Cretaceous period, approximately 125 to 99. 6 million years ago. It stands out for the tall neural spines on many of its vertebrae, which suggest the presence of a kind of "hump" on its neck, back and hips. It was one of the largest theropods, with a length of up to 11. 5 meters and