Plotosaurus (`swimmer lizard`) is an extinct genus of mosasaur from the Upper Cretaceous (Maastrichtian) of Fresno County, California. Originally named Kolposaurus (meaning `bay lizard`) by Berkeley paleontologist Charles Lewis Camp in 1942, it was changed to Plotosaurus in 1951 when Camp discovered the name had already been assigned to a type...
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http://en.wikipedia.org/wiki/Plotosaurus
(pronounced PLOAT-oh-SAWR-us) Plotosaurus was a mosasaur , a marine reptile that swam in shallow seas during the late Cretaceous period . These powerful swimmers were about 33 feet (10 m) long. They had four flippers and a tail that ended in a fin. These carnivores had sharp teeth and ate fish, squid, and perhaps shellfish. Fossils have been found ...
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http://www.enchantedlearning.com/subjects/dinosaurs/glossary/
Plotosaurus A “floating lizard” from Late Cretaceous North America was not a dinosaur. It was a marine reptile that swam in shallow seas.
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http://www.wordinfo.info/words/index/info/view_unit/3366/
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