The group also noticed fine wrinkles on the flaps, a hint that these appendages may have doubled as gills. “This new animal shows us what the most primitive gills in arthropods look like,” says Legg, ...

Ariel Chipman of The Alexander Silberman Institute of Life Science at the Hebrew University of Jerusalem provides a novel model for understanding the development and evolution of arthropod body ...

TheMegacheirans were a dominant class of arthropods during the Cambrian period, with a wide range of species using their large appendages to capture prey. However, the decline of the Megacheirans ...

They’re also one of the world’s largest arthropods, animals with no backbone, external skeletons, and multiple-jointed appendages. In this crab’s case, those appendages are its 10 legs.