Reclassification of Ancient Fossil Alters Octopus Evolution Timeline
The fossil Pohlsepia mazonensis, once thought to be the oldest known octopus, has been reclassified as a nautiloid, a shelled cephalopod. This discovery, made using advanced imaging techniques, challenges previous understandings of octopus evolution. The fossil, found in Illinois, was initially identified as an octopus due to its decomposed state, which made it appear octopus-like. However, new evidence shows it possesses features typical of nautiloids. This reclassification pushes the record of nautiloid soft tissue back by 220 million years and alters the timeline for octopus evolution. 
