The long-term ecology and evolution of marine reptiles in a Jurassic seaway

Marine reptiles flourished in the Mesozoic oceans, filling ecological roles today dominated by crocodylians, large fish, sharks and cetaceans. Many groups of these reptiles coexisted for over 50 million years (Myr), through major environmental changes. However, little is known about how the structure of their ecosystems or their ecologies changed over millions of years. We use the most common marine reptile fossils-teeth-to establish a...