A track of the giant theropod dinosaurTyrannosaurusfrom close to the Cretaceous/Tertiary Boundary, northern New Mexico

The first unequivocal example of a large tyrannosaur track attributable to the species Tyrannosaurus rex is an 86 cm long tetradactyl pedal impression assigned to Tyrannosauripus pillmorei ichnogen. et ichnosp. nov. The ichnospecies Tyrannosauropus petersoni Haubold is a nomen dubium. The only other example of a possible track of Tyrannosaurus is from the Laramie Formation of Colorado.