You searched for: “maresaurus
Maresaurus (proper name)
A “sea lizard” from Middle Jurassic South America.

Named by Z. B. de Gasparini in 1997. It was named to indicate a marine pliosauroid found in the Neuquen Basin, of central-western Argentina.

Named by Argentinian paleontologist Zulma N. Gasparini in 1997.