Campylomyzini

Distinguished from other Lestremiinae tribes by the combination of reduced wing venation and specific antennal structure. The short costa ending before the wing apex and simplified radial sector separate Campylomyzini from tribes such as Lestremiini. Male genitalia, particularly the shape of the gonostylus and parameters, provide definitive characters for genus-level identification. The presence of circumfilar loops on antennal flagellomeres distinguishes adults from Porricondylinae, which lack these structures.

Associated with fungal habitats including mushroom fruiting bodies, bracket fungi, and decaying wood with fungal growth. Larvae develop within fungal substrates. Adults are found in moist woodland environments, forest edges, and areas with abundant fungal decomposition.

Recorded from the Holarctic region, with occurrences in Europe, North America, and parts of Asia. Specific distribution varies by genus and species within the tribe. The tribe appears to be more diverse in temperate regions than in tropical zones.

Adult activity peaks during late spring through early autumn in temperate regions, coinciding with fungal fruiting periods. Specific timing varies with local climate and fungal phenology. Some species may exhibit extended flight periods in regions with year-round fungal activity.

Eggs are deposited on or near fungal substrates. Larvae feed internally within fungal fruiting bodies or mycelial masses, completing development through three instars. Pupation occurs within the larval gallery or in adjacent substrate. Adults emerge to mate and disperse, with no known plant gall formation in this tribe.

Adults are weak fliers, typically remaining close to larval emergence sites. Males form small aerial swarms near fungal substrates for mating. Both sexes are not known to feed as adults; mouthparts are reduced and non-functional in most species.

Decomposers and fungivores. Larvae contribute to nutrient cycling by consuming fungal tissue and accelerating decomposition of fungal fruiting bodies. They may influence fungal community dynamics through selective feeding, though specific impacts are poorly documented. Serve as prey for small predators including mites, spiders, and other arthropods in forest floor communities.

No direct economic importance. Occasionally encountered in mushroom cultivation settings but not considered pests. Of minor interest to dipterists and fungal ecologists studying arthropod-fungus relationships.

• LestremiiniAnother tribe within Lestremiinae; distinguished by longer wing costa extending to or beyond wing apex and generally more complex wing venation.
• PorricondylinaeSubfamily of Cecidomyiidae with reduced wing venation; distinguished by absence of circumfilar loops on antennae and different larval habitats.
• CecidomyiinaeLargest subfamily of Cecidomyiidae containing plant-gall-forming species; distinguished by larvae that induce plant galls rather than feeding on fungi.

• fungivore
• gall midge
• fungus-associated
• Lestremiinae
• decomposer
• forest insect

• BugGuide
• iNaturalist taxon
• Catalogue of Life