300-Million-Year-Old Fossil Previously Thought to Be Oldest Octopus Reclassified as Nautilus Relative

11 April 2026 · Source balance: Centre

Scientists have reclassified a 300-million-year-old fossil that was previously believed to be the world's oldest octopus. New research has determined that the prehistoric sea creature remains actually belong to a nautilus relative instead. This discovery represents a significant correction in paleontology, as the original classification had implications for understanding the evolutionary timeline of cephalopods. The fossil reclassification demonstrates how scientific understanding can evolve as new evidence emerges and research techniques improve. Octopuses and nautiluses are both cephalopods, but they represent different evolutionary branches within this group of marine animals. The correction affects our knowledge of when octopuses first appeared in the fossil record and how these intelligent sea creatures evolved over millions of years. This type of reclassification is not uncommon in paleontology, where initial interpretations of ancient remains may be revised as scientists develop better analysis methods and discover additional evidence.