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, ...

This discovery offers important new clues towards solving the long-standing riddle of how arthropods evolved the appendages on their heads: one or more pairs of legs at the front of their bodies ...

No more, no less. But there's more to this story. The class Insecta is descended from multilimb ancestors, and most other living arthropods, including Insecta's closest living relative, the Crustacea, ...

Sometimes we lump all these creepy crawlies under the term “arthropods,” which includes invertebrate (no spine) animals with a segmented body and jointed appendages. Examples of arthropods include ...

TheMegacheirans were a dominant class of arthropods during the Cambrian period, with a wide range of species using their ...

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.