The rove beetles are a large family

Family (biology)

In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 (Staphylinidae) of beetle

Beetle

Coleoptera is an order of insects commonly called beetles. The word "coleoptera" is from the Greek , koleos, "sheath"; and , pteron, "wing", thus "sheathed wing". Coleoptera contains more species than any other order, constituting almost 25% of all known life-forms...

s, 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 is the second largest family of beetles after the Curculionidae (the true weevils). It is an ancient group, with fossil

Fossil

Fossils are the preserved remains or traces of animals , plants, and other organisms from the remote past...

 rove beetles known from the Triassic

Triassic

The Triassic is a geologic period and system that extends from about 250 to 200 Mya . As the first period of the Mesozoic Era, the Triassic follows the Permian and is followed by the Jurassic. Both the start and end of the Triassic are marked by major extinction events...

, 200 million years ago.

One well-known species is the Devil's coach horse beetle

Devil's coach horse beetle

The Devil's coach-horse beetle is a very common and widespread European beetle, belonging to the large family of the rove beetles . It was originally included in the genus Staphylinus in 1764, and some authors and biologists still use this classification...

.