Colonial pseudoscorpion, Paratemnoides nidificator, Atemnidae

Paratemnoides nidificator is a widely-distributed species of neotropic pseudoscorpion. It lives in colonies and is one of only a few species of arachnids known to engage in complex social behavior. Read more here.

Pseudoscorpions may lack the pointy, poisonous tail of their more famous desert-dwelling cousins, but their crab-like front pincers still make them look quite formidable. Now, these small, sometimes overlooked arachnids are getting a closer look. Four new species of these tiny arachnids have been uncovered in the dark caves of South Korea. They have jaws like dragons and are even completely blind, according to a study published July 9 in the journal PLOS One.