A weird prehistoric squid with ten arms has been named after US President Joe Biden. The vampire squid-like creature is the oldest ancestor of cephalopods - which also include octopae.
Syllipsimopodi bideni was armed with two more limbs than its descendants today. It roamed the oceans 328 million years ago and had 10 arms, fins, and rows of suckers to clutch prey.
Additional appendages would have made it a more efficient predator, say the team at the American Museum of Natural History in New York. The species was unearthed at the Mississippian Bear Gulch in Montana - one of the best preserved fossil sites in the world.
