Pointed-winged Flies

Lonchopteridae

Classification

Phylum: Arthropoda
Subphylum: Hexapoda
Class: Insecta
Order: Diptera
Superfamily: Platypezoidea
Family: Lonchopteridae

Pronunciation

How to pronounce Lonchopteridae: //ˌlɒŋkoʊptəˈraɪdiː//

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Images

Summary

The Lonchopteridae, also known as spear-winged or pointed-wing flies, is a family of small flies characterized by their unique pointed wings and slender bodies. They are commonly found in moist habitats and are notable for their reproductive strategies that include both bisexual and parthenogenetic species.

Physical Characteristics

Minute, slender flies measuring 2-5 mm in length, yellow to brownish-black in color. They have long, pointed wings with distinct venation. The head is rounded with well-developed vertical and ocellar bristles, and bristles along the margin of the broad mouth. The legs also feature well-developed bristles.

Identification Tips

The most distinctive feature is the apically pointed wing, which is unique among North American species. Males have a somewhat different wing venation than females.

Habitat

Larvae are found under leaves and within decaying plant remains in moist, shady, grassy areas such as gardens, forests, and meadows. Adults are commonly found near water in humid environments, including hot springs and shady woods with thick leaf litter.

Distribution

Spear-winged flies are distributed worldwide, with a cosmopolitan species, Lonchoptera bifurcata, which may be associated with the transportation of vegetables. They are present in regions like the West Palaearctic, nearctic, Australasian/Oceanian, and Japan.

Diet

Adult spear-winged flies primarily feed on nectar.

Life Cycle

Life cycles involve both bisexual reproduction and parthenogenesis. Most species reproduce sexually, but in some cases, such as Lonchoptera bifurcata, males are rare or nonexistent and females reproduce parthenogenetically.

Reproduction

Most known species are bisexual, though some species exhibit parthenogenesis with females reproducing without males, particularly in North American species.

Ecosystem Role

Spear-winged flies may play a role in pollination due to their feeding habits on nectar.

Similar Taxa

Ironomyiidae
Phoridae