Clusiidae

Definition

A family of small, slender acalyptrate flies (Diptera), commonly called druid flies, characterized by a cylindrical body, large vibrissae, and wings typically with darkened (infuscated) markings. Members of the subfamily Clusiodinae exhibit lekking behavior, with males aggregating on tree trunks to display. Larvae develop under bark and possess an unusual jumping ability. The family comprises approximately 600 described species in 14 genera, with greatest diversity in tropical regions.

Etymology

From Clusia, the type genus established by Haliday in 1838, with the family suffix -idae.

Example

Male Clusia lateralis perform lekking displays on sunlit oak trunks, vibrating their wings to attract females while competing for central positions within the aggregation.

Synonyms

• druid flies

Related Terms

• Acalyptratae
• Diptera
• lekking
• vibrissae
• Clusiodinae
• Clusia

Usage Notes

Distinguished from other small yellow-to-black acalyptrate families by the combination of interrupted costa near the subcosta, large vibrissae, and the vertical plate reaching the anterior frons margin. The common name "druid flies" reflects their association with tree trunks and bark habitats. Not to be confused with Clusiaceae, a plant family.