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Mosasaurus (/ ˌmoʊzəˈsɔːrəs /; "lizard of the Meuse River ") is the type genus (defining example) of the mosasaurs, an extinct group of aquatic squamate reptiles. It lived from about 82 to 66 million years ago during the Campanian and Maastrichtian stages of the Late Cretaceous. The genus was one of the first Mesozoic marine reptiles known to science—the first fossils of Mosasaurus were found as skulls in a chalk quarry near the Dutch city of Maastricht in the late 18th century, and ... Learn about Mosasaurus , a powerful marine reptile that ruled the ancient oceans. Discover its physical features, diet, behavior, and how it evolved from ancient lizards. Explore the fascinating world of the Mosasaurus with this comprehensive guide filled with illustrations, facts, and more from the late Cretaceous period.
