New species of shark discovered in Kentucky

In 2020, a new species of ancient shark, the Macadens Olsoni, was identified from a fossil at Mammoth Cave National Park, Kentucky.

“This discovery is a remarkable addition to our understanding of ancient marine life and underscores the importance of preserving and studying our natural history,” said Superintendent Barclay Trimble. The shark is only one of the remarkable discoveries found in Mammoth Cave National Park. It was named after the park where it was discovered first: Macadens refers to the park‘s name, Mammoth Cave, and Olsoni references retired scientist Rikard Olson, who helped organize and research fossils at the park. A park spokesperson later said, “The Macadens Olsoni is notable because of its unique tooth whorl.”

The shark wasn’t no giant of the ocean. Researchers say it would have grown less than a foot long, about the size of the 30-centimeter rulers used at schools. Mammoth Cave National Park is home to the longest known cave system in the world, with over 400 miles of the cave explored to date, and it is also a UNESCO World Heritage site.

Millions of years ago, much of the cave was underwater and home to a variety of creatures. The Macadens Olsoni is just one of the latest discoveries found in the cave. “The finding not only increases our understanding of ancient marine ecosystems but also emphasizes the critical role of paleontological research in our National Parks,” said Superintendent Trimble. Every discovery connects the past with the present and offers important educational opportunities for the public.