Giant octopuses may have ruled the oceans 100 million years ago

New fossil discoveries reveal that ancient octopuses were massive apex predators up to 20 meters long, rewriting the evolutionary history of cephalopods. | Contesto: cronaca

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• Giant octopuses may have ruled the oceans 100 million years ago

Contesto

A groundbreaking study has upended long-held assumptions about the evolutionary history of octopuses, revealing that these creatures were not shy, soft-bodied drifters but massive apex predators that may have ruled the ancient seas more than 100 million years ago. By analyzing exquisitely preserved fossil jaws hidden inside rock, scientists have uncovered evidence that early octopuses from the age of dinosaurs were fearsome hunters, possibly stretching up to 20 meters in length and capable of crushing prey with powerful bites. The findings, published in a recent scientific report, challenge the conventional view that ancient octopuses were small, elusive animals that relied on camouflage and evasion to survive. Instead, the newly analyzed fossils suggest these cephalopods were dominant predators in their ecosystems, occupying the top of the food chain. The preserved jaws, known as beaks, provide critical clues about the size and feeding habits of these ancient creatures, indicating they could take down large prey with ease. Researchers involved in the study described the discovery as a "game-changer" for understanding octopus evolution. The fossils, which date back to the Cretaceous period, were found in rock formations that have preserved the delicate structures in remarkable detail. This level of preservation is rare, as octopus bodies are mostly soft tissue and rarely fossilize. The beaks, made of a durable material similar to chitin, offer a unique window into the biology of these long-extinct animals. The implications of this research extend beyond paleontology, shedding light on the ecological dynamics of ancient oceans. If early octopuses were indeed apex predators, they would have competed with other large marine reptiles, such as mosasaurs and plesiosaurs, for food and territory. This could reshape scientists' understanding of how marine food webs functioned during the Mesozoic Era, a time when dinosaurs dominated the land and giant reptiles ruled the seas. While the exact species of octopus identified in the study has not been named, the findings suggest that the evolution of octopuses was far more complex than previously thought. Modern octopuses,...

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Categoria: cronaca