Pseudotetrasauropus was a lightly-built bipedal prosauropod dinosaur that is is known only from its five-toed fossilized tracks. This primitive plant-eating ichnogenus lived from the late Triassic period to the Early Jurassic Period and had a broad range in what is now North America. Found on http://www.enchantedlearning.com/subjects/dinosaurs/glossary/