What is "overosaurus"

Overosaurus is an extinct genus of sauropod dinosaurs, containing only a single species, Overosaurus paradasorum. This species lived approximately 84 to 78 million years ago during the latter part of the Cretaceous Period in what is now Patagonia (in southern Argentina). Overosaurus paradasorum was relatively small compared with other sauropods from Patagonia, like the saltasaurids and other aeolosaurines. It was a ground-dwelling herbivore, that could grow up to long.