Scientists have found ancient nail tooth shark fossils deep inside Mammoth Cave in Kentucky, revealing new information about a mysterious group of extinct predators.

The Chipmunk Shark was believed to have swam along the ocean floor that is said to have covered much of central Kentucky during the Middle Mississippian period, officials claim.

The US National Park Service announced the identification of a new species of ancient shark, Clavusodens mcginnisi, discovered in Mammoth Cave National Park. The species name honors David McGinnis for his leadership in paleontological resource stewardship.