This is a Ptychodus news story, published by MSN, that relates primarily to Stethacanthus news.
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prehistoric sharksA-z-animals
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51% Informative
The Hybodus shark lived about 303.4 million to 66 million years ago and is possibly one of the longest-living prehistoric sharks of all time.
The Cretoxyrhina shark lived during the Cretaceous geological period, a time when there were many large creatures in the ocean, all fighting for supreme dominance over others.
The Stethacanthus had an odd dorsal fin that looks to be shaped like an anvil.
The Edestus had curved jaws that resulted in teeth sticking out at odd angles.
The first real shark, the Cladoselache , lived more than 380 million years ago .
Ptychodus was one of the largest prehistoric sharks, with some estimates placing its size up to 33 feet in length.
The Helicoprion , also called the “buzzsaw shark” lived about 290 million to 250 million .
These sharks also survived the Great Permian Extinction .
Megalodons were apex predators during their time.
Their teeth have been found on every single continent, save Antarctica .
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