Pincer-wielding 507m-year-old fossil sheds light on evolution of crabs

Mandibulates, a group that includes crustaceans and insects, show huge diversity – Tokummia katalepsis could be the missing link that explains whyA fossilised ancient creature boasting huge pincers resembling can-openers, a hinged two-piece shell and more than 50 pairs of legs has been discovered, shedding light on the evolutionary past of a huge and diverse group of animals.Researchers say the creature, thought to have lived about 507 million years ago during the Cambrian period, offers i