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Mosasaurus (/ ˌ m oʊ z ə ˈ s ɔːr ə s /; "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 specific placement of Mosasauria within the Squamata has been controversial since its inception, with early debate focusing on the classification of the mosasaurs. Cuvier was the first scientist to deeply analyze their possible taxonomic placement through Mosasaurus. While his original 1808 hypothesis that the genus was a lizard with ...
A mosasaur with an almost crocodilian-like head and was one of the few kinds to live in freshwater. It lived in rivers and hunted both aquatic and terrestrial animals in the area. †Hainosaurus †Hainosaurus bernardi ; 70.6–66 Ma Sweden A tylosaurine mosasaur that had more vertebrae in the neck and tail than its Tylosaurus cousin. It is one ...
The smaller mosasaurs may have spent some time in fresh water, hunting for food. The largest mosasaur Mosasaurus hoffmannii was the apex predator of the Late Cretaceous oceans, reaching more than 11 metres (36 ft) in length and weighing up to 10 metric tons (11 short tons) in body mass. [14]
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.
The long-necked, four-legged sauropods were the biggest land animals ever. The biggest dinosaur, titanosaur Argentinosaurus huinculensis, was a herbivore and lived in South America (hence the name).
Restoration of Mosasaurus hoffmannii, an extinct marine lizard.. Squamata is the largest order of reptiles, comprising lizards, snakes, and amphisbaenians (worm lizards). There are many examples of aquatic squamates, both living and extinct; a secondarily aquatic lifestyle has evolved multiple times.
All around Arizona, rocks hold remains of life that lived hundreds of millions of years ago. When people think fossils, dinosaurs typically come to mind – but that’s only one part of the picture.