image: Callichimaera perplexa: The strange fossil crustacean from the dinosaur era that forces a rethink of what a crab is. This material relates to a paper that appeared in the April 24th, 2019, issue of Science Advances, published by AAAS. The paper, by J. Luque at University of Alberta in Edmonton, AB, Canada, and colleagues was titled, "Exceptional preservation of mid-Cretaceous marine arthropods and the evolution of novel forms via heterochrony." view more
Credit: Daniel Ocampo R., Vencejo Films