Scientists Correct Misidentification of Ancient Fossil Once Thought to Be Octopus

A significant revision in paleontology has emerged as researchers revealed that a 300-million-year-old fossil, previously believed to be the oldest octopus, is actually a nautiloid, a relative of modern nautiluses. This discovery, published in the journal Proceedings of the Royal Society B, was led by Thomas Clements from the University of Reading. The fossil, named Pohlsepia mazonensis, was found in Mazon Creek, Illinois, and its octopus-like appearance was due to decomposition before burial. Advanced imaging techniques, including synchrotron imaging, uncovered hidden anatomical features, ultimately leading to the correct identification. This finding emphasizes the importance of new technologies in advancing scientific understanding and challenges long-held beliefs about the timeline of cephalopods.

Key Details: • The fossil is named Pohlsepia mazonensis and is 300 million years old. • Discovered at Mazon Creek, Illinois, it was misidentified as an octopus for years. • Advanced imaging techniques revealed key anatomical features that confirmed its true identity. • Research highlights the role of new technologies in paleontological studies.