 Like most known tyrannosaurids , Gorgosaurus was a bipedal predator weighing more than two metric tons as an adult ; dozens of large , sharp teeth lined its jaws , while its two @-@ fingered forelimbs were comparatively small . Gorgosaurus was most closely related to Albertosaurus , and more distantly related to the larger Tyrannosaurus . Gorgosaurus and Albertosaurus are extremely similar , distinguished mainly by subtle differences in the teeth and skull bones . Some experts consider G. libratus to be a species of Albertosaurus ; this would make Gorgosaurus a junior synonym of that genus . 
