Ilytheinae

Ilytheinae can be distinguished from other Ephydridae subfamilies by combinations of genitalic and chaetotactic characters, though specific diagnostic features require examination of adult morphology. The tribe Hyadinini (containing Hyadina, Nostima, and related genera) is characterized by particular wing venation patterns and bristle arrangements that separate it from Ilytheini. Species-level identification generally requires microscopic examination of male terminalia.

Associated with moist environments including shorelines, wetlands, and aquatic margins. Specific habitat preferences vary by genus; for example, Nostima species are often found in intertidal zones and salt marshes, while Hyadina occurs in similar saline or brackish habitats.

Widespread distribution with records from multiple continents. Genera such as Nostima and Hyadina occur in the Nearctic, Palearctic, and other regions. The subfamily has been documented in North America, Europe, and other areas with suitable wetland or coastal habitats.

Members of this subfamily contribute to decomposition and nutrient cycling in wetland and shoreline ecosystems. Larval stages of related Ephydridae are often detritivores or feed on microorganisms in moist substrates.

• EphydrinaeAnother subfamily of Ephydridae; distinguished from Ilytheinae by differences in wing venation, particularly the arrangement of crossveins and the shape of the anal cell, as well as male genitalic structure.
• PsilopinaeEphydridae subfamily with more reduced chaetotaxy and distinctively modified antennae that separate it from Ilytheinae genera.

• shore flies
• wetland insects
• Ephydridae
• Diptera
• aquatic insects

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• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life