500-million yr-previous species provides insights into the lives of historic legged worms

A new species of lobopodian, a worm-like animal with mushy legs from the Cambrian interval (541 to 485 million years in the past), has been described for the primary time from fossils discovered within the Burgess Shale within the Canadian Rocky Mountains.
Strange & Offbeat: Fossils & Ruins News — ScienceDaily