The rove beetles are a large family (Staphylinidae) of beetles, primarily distinguished by their short elytra that leave more than half of their abdomens exposed. With over 46,000 species in thousands of genera, the group's the second largest family of beetles after the Curculionidae (the true weevils). It's an ancient group, with fossil rove beetles known from the Triassic, 200 million years ago. One well-known species's the Devil's coach horse beetle. For some other species, see List of Briti… (More on Staphylinidae)