Mesosaur ("middle lizards") were an order of small marine reptiles that lived during the early Permian period, roughly 320 to 280 million years ago. Mesosaurs were the first aquatic reptiles, having returned to a watery way of life after evolving on land.

Mesosaurus

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The most well-known mesosaur is Mesosaurus itself. Fossils of the animal were found in Namibia, Africa and parts of South America, such as Brazil, Uruguay, and Paraguay. Africa and South America which, when viewed on a map of the Earth, appear to 'interlock' - helped to reinforce the idea of continental drift. ^*" target="_blank" >[http://www.calstatela.edu/faculty/acolvil/plates/mesosaurus.jpg

Mesosaurus resembled a small alligator, although the most common specimens are only 40 centimeters in length. Nonetheless, the largest specimen is almost 2 meters in length, and Mesosaurus was probably the largest land animal of its time. It is believed to have fed on fish, or possibly crustaceans, by using its teeth as a sieve, rather like modern-day whales.

Prehistoric reptiles | marine reptiles

Mesosaurus | Mesosaurus | Mesosaurus | 中龙目