Deep within Mammoth Cave, the world’s longest cave system, paleontologists have uncovered the remains of a never-before-seen species of ancient shark. Named Clavusodens mcginnisi, or McGinnis’ nail tooth,

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

Paleontologists at Mammoth Cave National Park have unearthed an ancient shark species previously unknown to science.

An ongoing Paleontological Resource Inventory discovered the new species, called Clavusodens mcginnisi, while collecting fossil teeth deep inside a formation with the cave system.

A new species of shark has been discovered a Mammoth Cave National Park, where fossil records have revealed more than 70 species of shark that swam in the ocean when this part of present-day Kentucky was under water about 340 million years ago.