Hainosaurus ("Hain river lizard") is an extinct genus of marine lizard belonging to the mosasaur family. It was one of the largest mosasaurs, reaching lengths of up to 15 meters (49 ft) which made it a top predator of the Late Cretaceous. These animals may have preyed on turtles, mosasaurs, plesiosaurs, pterosaurs, cephalopods, sharks and fish.
Specimen MNHN 1896-15 jaw fragments, MNHN, Paris Hainosaurus was a member of the Tylosaurinae, and it was related to the wholly North American Tylosaurus. However, it had more vertebrae from the neck to the part of the tail with chevrons (53) than Tylosaurus(35). Both genera are large marinesuperpredators. Hainosaurus tail has less chevron-bearing vertebrae, making it shorter than that of Tylosaurus. The only known and type species of Hainosaurus is H. bernardi, named after the Belgian Léopold Bernard, owner of the phosphate chalk exploitation where the fossil was unearthed.Write the first paragraph of your page here.