Grallator Footprints From Connecticut Grallator is a name for a common type of small, three-toed print made by a variety of theropod dinosaurs that walk on two feet. These footprints date from the late Triassic period to the early Cretaceous period. They have been found all over the world, including North America, Asia, Europe, and Australia. Grallator prints are typically 2 to 6 inches long.