Staphylinidae

Definition

A family of beetles (order Coleoptera) comprising the rove beetles, characterized by abbreviated elytra that leave most of the abdomen exposed and flexible, permitting the characteristic 'tail-wagging' defensive posture. With more than 66,000 described species across thousands of genera, it is one of the largest families of organisms on Earth. Members occupy virtually every terrestrial and semiaquatic habitat, functioning as predators, scavengers, fungivores, and specialists on carrion, dung, or social insect colonies. The family first appears definitively in the Middle Jurassic fossil record.

Etymology

From Staphylinus (type genus, from Greek staphylinos 'kind of insect') + -idae (family suffix)

Example

The rove beetle Staphylinus olens (devil's coach horse) is a familiar Staphylinidae species that adopts a scorpion-like defensive posture when disturbed, curling its abdomen upward while secreting noxious compounds from abdominal glands.

Synonyms

• rove beetles (common name)

Related Terms

• Coleoptera
• Polyphaga
• elytron
• Pselaphinae
• Aleocharinae
• Staphylininae
• Paederinae
• Myrmecophily

Usage Notes

The family is distinguished from other Coleoptera by the greatly shortened elytra (covering only 1–2 abdominal tergites) and the exposed, flexible abdomen. The term 'rove beetle' refers to the family's wandering habit. Specialist subfamilies include the diminutive ant-loving Pselaphinae and the myrmecophilous Lomechusini (Aleocharinae). Some sources formerly treated Scydmaeninae as a separate family (ant-like stone beetles), but current classification places it within Staphylinidae.