Eric Walker added Tyrannosaurus rex and Tyrannosaurus - Wikipedia to Tyrannosaurus, and added Tyrannosaurus to Tyrannosaurinae

Eric Walker added Tyrannosaurus to Tyrannosaurinae, and added Tyrannosaurinae to Tyrannosauridae

Eric Walker added Tyrannosaurinae to Tyrannosauridae, and added Tyrannosauridae to Theropoda