Spear-winged flies

Definition

A family of small, slender Diptera (Lonchopteridae) characterized by pointed wings with distinctive venation; typically 2–5 mm, yellow to brownish-black, and globally distributed. Many species reproduce via parthenogenesis, with males rare or absent in some populations and exhibiting slightly different wing venation when present.

Etymology

From the spear-like pointed shape of the wings and the common suffix for true flies.

Example

Lonchoptera furcata, a widespread parthenogenetic species, is commonly encountered in damp, shaded habitats across North America and Europe.

Synonyms

• Lonchopteridae

Related Terms

• Parthenogenesis
• Diptera
• wing venation
• Brachycera
• small flies

Usage Notes

The common name refers specifically to wing shape; do not confuse with other pointed-wing Diptera such as some Phoridae. The family is morphologically distinctive but often overlooked due to small size. Male rarity makes population genetics studies challenging.