Dinosaur Parasaurolophus is a genus of ornithopod dinosaur from the Late Cretaceous Period of what is now North America, about 83-73 million years ago. Parasaurolophus is a hadrosaurid, part of a diverse family of Cretaceous dinosaurs known for their range of bizarre head adornments. This genus is known for its large, elaborate cranial crest, which at its largest forms a long curved tube projecting upwards and back from the skull. The skeleton of Parasaurolophus is incompletely known. The length of the type specimen of P. walkeri is estimated at 9.5 meters. Its skull is about 1.6 meters long, including the crest, whereas the type skull of P. tubicen is over 2.0 meters long, indicating a larger animal. Its weight is estimated at 2.5 tonnes (2.7 tons). All these Dinosaur Torvosaurus pictures were collected from the internet. Enjoy and explore.