Chucarosaurus

Chucarosaurus is a genus of titanosaurian sauropod dinosaur from the Late Cretaceous of Argentina, known from fairly intact remains of the left limbs, including a 1.9 m femur. It was a large, slender-limbed colossosaur - 30 m in length, and weighing around 50 t. Characteristics in its hips, forelimbs, and hindlimbs suggest that despite its massive size, Chucarosaurus was slender and more gracile than would be otherwise expected for such a large animal.