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The fossil shark Ptychodus was first identified 190 years ago, but in the intervening centuries of paleontological inquiry, a comprehensive look at the ancient fish has been hard to come by. Until now.
The fossil shark Ptychodus was first identified 190 years ago, but in the intervening centuries of paleontological inquiry, a comprehensive look at the ancient fish has been hard to come by. Until now.
No aquatic reptiles today can match mosasaurs, ocean-dwelling creatures of the Cretaceous period that looked something like a cross between a whale and a shark. Now, a group of researchers have discovered a mosasaur that they believe bridges the gap between two iconic species in the ancient group.