An article published in the journal “Proceedings of the Royal Society B: Biological Sciences” reports a study on specimens in an exceptional state of conservation of Gangtoucunia aspera, a primitive animal that lived during the Cambrian period, just over 500 million years ago. A team of researchers examined new fossils attributed to this species that included their soft tissues. This made it possible to study the first animals that had developed a skeleton and concluded that they were related to today’s phylum of cnidarians, in particular, the scyphozoans (class Scyphozoa), which include the larger jellyfish.