Dinosaur footprint Dinosaur footprint made by a theropod The theropod meaning beastfooted dinosaurs were nearly all twolegged carnivores the most famous of which was Tyrannosaurus rex Footprints such as this show that theropods moved faster and moved more purposefully than large planteating dinosaurs Theropod fossils have been found from the late Triassic to the late Cretaceous periods million years ago