Cantabrigiaster
Cantabrigiaster is an extinct genus of asterozoan echinoderms from the order Somasteroidea known from the Fezouata Formation of Morocco. The type species C. fezouataensis was initially described in a 2017 preprint in "bioRxiv", but the paper was not published until 2021 in "Biology Letters" after being peer-reviewed. It is the oldest starfish-like fossil and would have been one of the first relatively modern animals. Like other somasteroids, "Cantabrigiaster" is thought to be closely related to the ancestors of all modern Asterozoa (starfish and brittlestars).