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Fossilized Mako Shark Teeth Size:1-1.5" glazed stoneware valet trays areMako sharks first appear in the fossil record in the Paleocene possibly around 60 million years ago. In the Eocene, around 55 million years ago, the Isurus praecurser (Macrorhizodus praecursor) genus branches from the makos. This "Macrorhizodus" genus continues to diversify throughout the fossil record. The teeth broaden over time and eventually branch into the White Sharks. Some time in the late Oligocene, modern looking forms of mako sharks appear.