Definition: Zeuglodontidae is a group of extinct, but not yet scientifically confirmed, dinosauria. This class includes dinosaurs that lived between 208 and 165 million years ago in what is now North America. Their fossils have been found at various sites across the Americas, including the San Juan Mountains in Argentina, where they were discovered in 1976. The exact age of these dinosaurs is still a matter of debate among paleontologists due to their lack of