Phoridae

Definition

A family of minute to small Diptera (order Diptera, suborder Brachycera) commonly called phorid flies or scuttle flies, characterized by a pronounced hump-backed thorax, reduced wing venation, and a distinctive escape behavior of running rapidly across substrates rather than flying. The family comprises approximately 4,000 described species in 230 genera, including the cosmopolitan nuisance species Megaselia scalaris and the minute Euryplatea nanaknihali (0.4 mm), the world's smallest fly. Many species are saprophagous, myrmecophilous, or parasitoids of other arthropods, with some, such as Conicera tibialis (coffin fly), associated with decomposing organic matter including buried remains.

Etymology

From Greek phora ('carrying, motion'), with family suffix -idae

Example

Forensic entomologists document phorid fly succession on remains; Conicera tibialis adults have been recovered from coffins exhumed years after burial, demonstrating their ability to locate and colonize buried carrion through soil pores.

Synonyms

• phorid flies
• Scuttle flies
• hump-backed flies

Related Terms

• Diptera
• Brachycera
• Megaselia
• myrmecophily
• saprophagy
• coffin fly
• Forensic entomology
• carrion ecology
• scutellum

Usage Notes

The common name 'scuttle fly' specifically references the characteristic running escape response that distinguishes phorids from similarly small drosophilid or chloropid flies. 'Coffin fly' applies narrowly to Conicera tibialis and should not be generalized to the entire family. Phoridae is sometimes confused with Drosophilidae in field settings; the reduced wing venation and distinct thoracic hump provide diagnostic separation. The family is taxonomically diverse with multiple subfamilies (Aenigmatiinae, Metopininae, Phorinae), and identification to genus or species typically requires microscopic examination of male terminalia.