Oldest species of swimming jellyfish discovered in 505m-year-old fossils

New species named Burgessomedusa phasmiformis was found in Canada and is exceptionally well preserved

The oldest species of swimming jellyfish ever recorded has been discovered in 505m-year-old fossils, scientists have said.

The fossils were found at Burgess Shale in Canada, an area known for the number of well-preserved fossils found there.