Sauropod
Sauropods were a type of large dinosaur remembered as the lion of the Cretaceous period and were the size of a school bus. Humans concluded that big Sauropods would have been chased down by the Tyrannosaurus Rex. Some subspecies of Anurognathus had a symbiotic relationship with larger Sauropods, cleaning small parasites off the hide of the larger dinosaurs.
Titanosaurs were a family of huge Sauropods that thrived during the late Cretaceous period and were the largest creatures ever to walk the Earth. Titanosaurs encompassed lots of similar gigantic herbivores such as Saltasaurus and Ampelosaurus; there was, in fact, no one species called a Titanosaurus. They were stockier and heavier but slightly shorter than the Sauropods that preceded them. Like other Sauropods, Titanosaurs had long tails that could be used as a defensive weapon. (PROSE: Prehistory Repeating Itself [+]Loading...["Prehistory Repeating Itself (feature)"])