Mosasaurs (from Latin Mosa meaning the 'Meuse', and Greek σαύρος sauros meaning 'lizard') are an extinct group of large aquatic reptiles within the family Mosasauridae that lived during the Late Cretaceous.

Mosasaur, an extinct group of predatory marine lizards that competed with other marine reptiles for food during the Cretaceous Period (145.5 million to 66 million years ago). Mosasaurs were widespread in the oceans, and many were quite large, some measuring up …

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.

Mosasaurs were top predators of the world’s oceans and would eat anything they could catch. The modern relatives of mosasaurs are snakes and monitor lizards, both of which live on land. When mosasaurs evolved from a terrestrial lifestyle to a marine one, they developed webbed paddles for swimming.

2023年10月19日 · Mosasaurs were Earth's last great marine reptiles. Learn about the surprising places they'd hunt, how some species dwarfed even the Tyrannosaurus rex, and how key physical adaptations allowed these reptiles to become a prehistoric apex predator.

2021年8月6日 · Mosasaurus is an extinct aquatic reptile that lived at the very end of the Cretaceous Period, from around 82.7 to 66 million years ago. Mosasaurus was not a dinosaur; like other mosasaurs, it was descended from lizards that originally lived on land.

2020年10月15日 · With long jaws and powerful tails, they looked like a cross between a crocodile and a whale. Some mosasaurs were as big as whales, too–at 30-60 feet, the largest species were longer than all but the largest modern whales. What Color Were Mososaurs? Did Mosasaurs Lay Eggs? Where Were Mosasaurs Found? When Did Mosasaurs Become Extinct?

2022年3月26日 · The Mosasaurus was a genus of small to monstrous sea-dwelling reptiles that lived in the waters of the Late Cretaceous oceans during the Maastrichtian geologic timescale. It included the species of mosasaurs viz. M. missouriensis, M. conodon, M. lemonnieri, and M. beaugei. These carnivores are often referred to as the ‘T-Rex of the seas’.

Mosasauria is a clade of aquatic and semiaquatic squamates that lived during the Cretaceous period. Fossils belonging to the group have been found in all continents around the world.

Mosasaurus (“lizard of the Meuse River”) is a genus of mosasaurs, carnivorous aquatic lizards. It existed during the Maastrichtian age of the late Cretaceous period, between about 70 and 66 million years ago, in western Europe and North America.