| Named By: | K. J. Lacovara, L. M. Ibiricu, M. C. Lamanna, J. C. Poole, E. R. Schroeter, P. V. Ullmann, K. K. Voegele, Z. M. Boles, V. M. Egerton, J. D. Harris, R. D. Martinez, F. E. Novas in 2014 |
| Time Period: | Late Cretaceous, 75 Ma |
| Location: | Argentina, Santa Cruz Province |
| Size: | Up to 26 meters long and around 59 tons in weight for the holotype individual, fully grown adults would have been larger, but total size cannot yet be confirmed |
| Diet: | Herbivore |
| Fossil(s): | Roughly half of the post cranial skeleton and a maxilla of the skull. Remains are of a younger and not yet fully grown individual |
| Classification: | | Chordata | Reptilia | Dinosauria | Saurischia | Sauropoda | Titanosauria | |
Dreadnoughtus is a genus of giant titanosaurian sauropod dinosaur containing a single species, Dreadnoughtus schrani. D. schrani is known from two partial skeletons discovered in Upper Cretaceous (Campanian-Maastrichtian; 84-66 Ma) rocks of the Cerro Fortaleza Formation in Santa Cruz Province, Argentina. It is one of the largest of all known terrestrial vertebrates, possessing the greatest mass of any land animal that can be calculated with reasonable certainty. D. schrani is known from a more complete skeleton than any other gigantic titanosaurian.