Dimetrodon Skeleton, juvenile Alamosaurus Desmostylus was a large

Desmostylus was a large

dome-shaped body armor

Unlike most modern birds Confuciusornis retained clawed fingers on its wings

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as we know them

Dimetrodon Skeleton, juvenile Alamosaurus Desmostylus was a largeJuvenile Dimetrodon Skeleton, Permian Of North America 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 during the Permian period, living mainly in swampy areas. Unlike their fellow non finned