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Science
Tom Fletcher, Honorary Research Fellow in Palaeobiology, University of Leicester

Meet the ten-armed, 325-million-year-old octopus fossil named after President Joe Biden

K Whalen

In an ancient shallow bay of what is now Montana, the body of an octopus-like creature the size of a fist was buried on the seafloor. Some 325-328 million years later, a new paper published in Nature Communications provides some interesting insights into this mysterious and ancient cephalopod.

Syllipsimopodi bideni is small (about 12cm in length), has ten arms, suckers, fins, and a triangular pen of hard tissue inside its body for support. It’s a unique find because “squishy” animals tend to degrade quickly after death and therefore rarely make good fossils.

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