English: Udelartitan is a titanosaurian sauropod from the Late Cretaceous of what is now Uruguay. It had the typical sauropod body plan, standing on four thick pillar-like legs, and possessing a long neck. Titanosaurs are a very diverse group, Udelartitan was a small one, estimated at only 15 m in body length. Though a skull has yet to be discovered, it probably had peglike teeth, and a large gut for processing vegetation.