The Mosasaurinae are a subfamily of mosasaurs, a diverse group of Late Cretaceous marine squamates. Members of the subfamily are informally and collectively known as "mosasaurines" and their fossils have been recovered from every continent except for South America.
Mosasaurinae
Skeleton of Clidastes liodontus mounted as if pursuing a fossil sea turtle
Mosasaurs are an extinct group of large aquatic reptiles within the family Mosasauridae that lived during the Late Cretaceous. Their first fossil remains were discovered in a limestone quarry at Maastricht on the Meuse in 1764. They belong to the order Squamata, which includes lizards and snakes.
Fossil shell of ammonite Placenticeras whitfieldi showing punctures caused by the bite of a mosasaur, Peabody Museum of Natural History, Yale
A tooth from a mosasaur
Scales of Tylosaurus proriger (KUVP-1075)
Fibrous tissues and microstructures recovered from Prognathodon specimen IRSNB 1624