DINOSAUR - Dimetrodon group showing typical fin-back

DINOSAUR - Dimetrodon group showing typical fin-back framework for sail. Pteranodon flying. Early Permian period (286 million years ago). DIMETRODON shows elongated spines of the back vertebrae (3 feet / 1 m. long in centre). It lived in early Permian period (286 million years ago) in North America (Oklahoma, Texas). Its order is Pelycosauria, subclass Synapsida. Size 10 ft / 3 m long.The flying PTERANODON lived in the late Cretacerous period (114 million years ago)

Arid Dimetrodon Dinosaur Dinosaurs Extinct Illustration Illustrations Prehistoric Pteranodon Sail Showing Typical

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