Named By: Xabier Pereda-Suberbiola, José Ignacio Canudo, Penélope Cruzado-Caballero, José Luis Barco, Nieves López-Martínez, Oriol Oms & José Ignacio Ruiz-Omeñaca - 2009.
Classification: Chordata, Reptilia, Dinosauria, Ornithischia, Ornithopoda, Hadrosauridae, Lambeosaurinae.
Species: A. ardevoli (type).
Size: Estimated to be about 5 to 6 meters long.
Known locations: Spain - Tremp Formation.
Time period: Maastrichtian of the Cretaceous.
Fossil representation: Partial skull and skeleton.
Arenysaurus was a late Cretaceous hadrosaurid dinosaur, and of extra significance since it was a lambeosaurine. This means that Arenysaurus had a hollow crest on its head, and lived in a time when lambeosaurine hadrosaurs had been largely replaced by saurolophine hadrosaurs in other parts of the world like in North America.
- The last hadrosaurid dinosaurs of Europe: A new lambeosaurine from the Uppermost Cretaceous of Aren (Huesca, Spain), Xabier Pereda-Suberbiola, José Ignacio Canudo, Penélope Cruzado-Caballero, José Luis Barco, Nieves López-Martínez, Oriol Oms & José Ignacio Ruiz-Omeñaca - 2009.