Facts . megalodon - prehistoric wildlife, Facts and information about dinosaurs and thousands of other prehistoric creatures.. Shark - wikipedia, Modern sharks began to appear about 100 million years ago. fossil mackerel shark teeth date to the early cretaceous.one of the most recently evolved families is the hammerhead shark (family sphyrnidae), which emerged in the eocene. the oldest white shark teeth date from 60 to 66 million years ago, around the time of the extinction of the dinosaurs.in early white shark evolution there are at. Hammerhead shark teeth sale, The hammerhead shark isn't a specific species but rather a group of sharks in the family sphyrnidae.currently taxonomists have identified a total of nine species in this family..
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