First known cephalopod was just a millimeter long, dating back 520 million years

Scientists have identified the earliest known cephalopod, a tiny creature measuring only one millimeter, that lived approximately 520 million years ago. This discovery provides crucial insight into the early evolution of cephalopods, a group that includes modern octopuses, squid, and cuttlefish, suggesting their ancestors were much smaller than previously thought. The finding reshapes our understanding of the origins and early diversification of this important marine lineage.

Sources (1)