Xenacanthus is a genus of prehistoric sharks. The first species of the genus lived in the Late Devonian, the genus surviving until the end of the Triassic, over 200 million years ago. Fossils of various species have been found worldwide. The species identified at Petrified Forest National Park is X. moorei.
Did You Know?
Over 52,000 acres within Petrified Forest National Park is designated Wilderness waiting for you to explore. More...