Category Archives: Jurassic Period

Plesiosaur:

Plesiosaur Timeline: Jurassic through Cretaceous Period Is a carnivorous aquatic reptile with a broad body and a short tail. Retaining their ancestral two pairs of limbs, which evolved into large flippers. They were slow swimmers. The name applies to the … Continue reading

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Ammonites

Fossil display at National Museum of Natural History Smithsonian, National Mall, Washington, D.C. Ammonites Timeline: Jurassic / Cretaceous Period (256-65 Million years ago) Maximum size: 2.6 meters (8.5 feet) in diameter Predator advantage: tentacles, large beak Likely prey: Fishes, mollusks, … Continue reading

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