Heterocheila

Distinguished from related families (Helcomyzidae, Dryomyzidae, Coelopidae) by the narrow precoxal bridge extending from the prosternum to the propleuron. The combination of bare metepisternum, single row of acrostichal bristles with enlarged prescutellar pair, and specific wing venation characters (straight apical M, aligned Bm-Cu and CuA2) separates Heterocheilidae from superficially similar kelp flies (Coelopidae) in the same superfamily.

Temperate seashores of the Northern Hemisphere, specifically the wrack zone where stranded kelp accumulates on beaches.

Northern Hemisphere temperate regions. Heterocheila buccata: Palearctic distribution in North America and Eurasia. Heterocheila hannai: northeastern USA (Alaska, Oregon, Washington). GBIF records from Denmark, Norway, and Sweden.

Adults and larvae feed on stranded kelp in the wrack zone.

• stranded kelp - food sourceBoth adult and larval stages feed on kelp in wrack zone

Decomposer in coastal wrack zone ecosystems, processing stranded macroalgae.

• Coelopidae (kelp flies)Similar habitat and feeding ecology on stranded kelp; distinguished by wing venation, prosternal structure, and bristle patterns

• wrack zone
• kelp
• seashore
• decomposer
• acalyptrate

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life