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Description
In the Western Interior Seaway that covered the Great Plains of North America during the Cretaceous, a giant hybodontiform shark Ptychodus attacks a giant ammonite Parapuzosia. Unlike many other sharks of its time, Ptychodus’ jaws were filled with plate-like teeth adapted to crushing and crunching hard-shelled prey including mollusks and crustaceans, similar to modern bullhead sharks. These teeth, along with it’s great size at 30 feet long, allowed the shark to tackle even the biggest and toughest hard-shelled animals like the 9-foot wide Parapuzosia.

Description
In the Western Interior Seaway that covered the Great Plains of North America during the Cretaceous, a giant hybodontiform shark Ptychodus attacks a giant ammonite Parapuzosia. Unlike many other sharks of its time, Ptychodus’ jaws were filled with plate-like teeth adapted to crushing and crunching hard-shelled prey including mollusks and crustaceans, similar to modern bullhead sharks. These teeth, along with it’s great size at 30 feet long, allowed the shark to tackle even the biggest and toughest hard-shelled animals like the 9-foot wide Parapuzosia.