A new genus and species of petalodont (petal-toothed) shark has been identified from fossilized teeth found in cave passages of Mammoth Cave National Park in Kentucky, the United States. Life reconstruction of Strigilodus tollesonae. Image credit: Benji Paysnoe. The newly-identified shark species lived in the seas of the Carboniferous period, approximately 337 million years ago. It belongs to Petalodontiformes, an extinct order of cartilaginous fishes...
