Lot 1471
Mesosaurus Marine Reptile. Mesosaurus was a very important 260 million year old marine reptile that was the first known reptile to return to the sea shortly after evolving from amphibians. It helped prove the theory of continental drift as it is found only on the western part of South Africa and the eastern part of South America. This huge nearly complete 23 inch long fossil on a 21 x 10 inch limestone matrix is from the Irati Formation of Brazil. The attractive brown bone has excellent detail of the vertebrae, rib bones, delicate feet and crocodile-like skull with several small sharp teeth. This considerably above average specimen is missing only one leg and some bones on one of the other legs and a few bones at the tip of the tail. This fossil Mesosaurus has both size and quality as the average Mesosaurus is only 12-16 inches long and missing two or more legs.
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Estimated Value $1,700 - 2,500.
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