Maresaurus was a plesiosaur, a type of marine reptile. It was not a dinosaur, though it coexisted with many dinosaurs.
All these Maresaurus pictures were collected from the internet. Enjoy and explore:
- M. S. Fernandez. 1999. A new ichthyosaur from the Los Molles Formation (Early Bajocian), Neuquen Basin, Argentina. Journal of Paleontology 73(4):677-681