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South Dakota
feeding exclusively on certain types of leaves
" Megatherium was named by paleontologist Richard Owen in 1856
like this one
and was subsequently able to restore it to it rightful place
Dimetrodon skeleton Ankylosaurus South DakotaPronounced (die MET roh don) Dimetrodon was a prehistoric animal with a large sail; it was not a dinosaur but a pelycosaur, an early synapsid. Dimetrodon (meaning two measure teeth) was a sail backed, meat eating animal that lived during the Permian Period, roughly 280 MYA years ago, before the dinosaurs evolved. It was a so called mammal like reptile, a pelycosaur; pelycosaurs were the ancestors of the mammals. Dimetrodon was a dominant carnivore
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