Large 7/8 Ptychodus Mortoni Fossil Cretaceous Crusher Shark Tooth Texas

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Large 7/8 Ptychodus Mortoni Fossil Cretaceous Crusher Shark Tooth

First associated tooth set of a high-cusped Ptychodus

Large 7/8 Ptychodus Mortoni Fossil Cretaceous Crusher Shark Tooth Texas

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A revision of the Upper Cretaceous shark Ptychodus mediterraneus

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