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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 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]
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 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 ...
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.
Mosasaurini is an extinct tribe of mosasaurine mosasaurs who lived during the Late Cretaceous and whose fossils have been found in North America, South America, Europe, Africa and Oceania, with questionable occurrences in Asia.
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Yaguarasaurines were primitive and comparatively small to medium-sized mosasaurs that lived during the earlier stages of mosasaur evolutionary history. Yaguarasaurus columbianus itself is the largest species of the subfamily, with the largest known skeleton at a length of 5 metres and a massive isolated skull indicating larger sizes.