540-Million-Year-Old Salterella Fossil Finally Identified as Cnidarian

Paleontologists have determined that the mysterious Salterella fossil, dating back 540 million years, is a type of cnidarian—a group that includes today’s jellyfish and corals. This ends a century-long debate over its evolutionary lineage and redefines our picture of Cambrian biodiversity. The decision allows scientists to reclassify related ancient specimens, unlocking new avenues in the study of early animal life.

Explore fossil mysteries—see how Salterella is rewriting the ancient story of our oceans!