Gorgosaurus

Gorgosaurus, also known as albertosaurus, was a species of dinosaur.

Description
Gorgosaurs looked like other carnosaurs like tyrannosaurus but were somewhat smaller. They had a long jaw that was filled with rear-facing teeth.

Behavior
Gorgosaurs were known for being aggressive.

Biology
Gorgosaurs were carnivorous and solitary creatures. It is speculated by sages they were the ancestor of tyrannosaurs.