500 million-year-old clawed predator rewrites the origins of spiders and horseshoe crabs
image: Holotype specimen (part and counterpart) showing the spectacular scissor-like chelicerae of Megachelicerax cousteaui. view more Credit: Credit: Rudy Lerosey-Aubril It was a long day of instruction for Rudy LeRochy-Aubril. As a reward, he returned to cleaning an interesting Cambrian arthropod fossil he had recently received for review. Initially, the specimen showed all the characteristics … Read more