Zygoneura calthella

As a recently described species with minimal published diagnostic material, specific identification criteria for Z. calthella are not readily available in accessible literature. The genus Zygoneura contains small sciarids (body length approximately 2–4 mm) with reduced wing venation and characteristic antennal morphology; species-level identification typically requires examination of male genitalia and comparison with type material.

The type locality is associated with marsh-marigold (Caltha palustris) in wetland or marshy habitats. This suggests development in saturated, decaying plant material.

Known from Germany, specifically the type locality where specimens were reared from Caltha palustris.

• Caltha palustris - developmental substrateLarvae reared from decaying leaves and stems; type series source.

As a sciarid, larvae likely contribute to decomposition of plant matter in wetland ecosystems. Adults probably serve as prey for small predators.

• Other Zygoneura speciesCongeneric species share general morphology and habitat preferences; reliable separation requires detailed morphological study, particularly of male terminalia.
• Sciaridae gen. spp.Small size and reduced wing venation make Zygoneura superficially similar to numerous other dark-winged fungus gnats; genus assignment requires antennal and genitalic examination.

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