Nemegtosaurus mongoliensis

Nemegtosaurus was a sauropod dinosaur from the Late Cretaceous Period of what is now Mongolia. Measuring an estimated 12–13 m (39–43 ft) long and weighing 20 t (44,000 lb), it was named after the Nemegt Basin in the Gobi Desert, where the remains — a single skull — were found. The skull resembles diplodocoids in being long and low, with pencil-shaped teeth. However, recent work has shown that Nemegtosaurus is in fact a titanosaur, closely related to animals such as Saltasaurus, Alamosaurus, and Rapetosaurus.