A 2010 Carr article found autapomorphy of this genus's holotype, paratype and other specimens in an enlarged pneumatic opening of its palatine bone, confirming taxonomic integrity. Keiran wrote of this species in 1999's Death of a Predator, while the Royal Tyrell Museum foun
A 2010 Carr article found autapomorphy of this genus's holotype, paratype and other specimens in an enlarged pneumatic opening of its palatine bone, confirming taxonomic integrity. Keiran wrote of this species in 1999's Death of a Predator, while the Royal Tyrell Museum found over 20 of this genus at one site, the largest aggregation of nonavian Cretaceous theropods, suggesting it hunted in packs. With main species sarcophagus, its species libratus is disputed with Gorgosaurus, while this predator was approximately 1/5th the size of Tyrannosaurus rex. For 10 points name this meat-eating dinosaur, found mainly near Dry Island Buffalo Jump in its namesake province.
A 2010 Carr article found autapomorphy of this genus's holotype, paratype and other specimens in an enlarged pneumatic opening of its palatine bone, confirming taxonomic integrity.