Rheopelopia

Rheopelopia larvae can be distinguished from other Tanypodinae by characters of the hypopygium and genitalia in males, and by features of the larval head capsule and mandible structure. Specific identification requires microscopic examination of these morphological features. The genus is part of the Pentaneurini tribe, which can be separated from other Tanypodinae by the reduced or modified ligula of the larva.

Larvae inhabit lotic (running water) environments including streams and rivers. They are typically found in association with sandy or gravelly substrates.

Recorded from Colombia (Cundinamarca), Denmark, Norway, and Sweden. The genus has a Holarctic distribution with some representation in the Neotropics.

As with other Chironomidae, development includes egg, four larval instars, pupal, and adult stages. Larvae are aquatic and predatory or omnivorous. Pupation occurs in the aquatic substrate, with adults emerging to mate in aerial swarms.

Larvae function as predators or particle-feeders in freshwater stream communities, contributing to nutrient cycling and serving as prey for larger aquatic invertebrates and fish.

• ThienemannimyiaAlso in tribe Pentaneurini with similar larval habitat preferences; distinguished by differences in adult genitalia and larval head capsule sclerotization patterns.
• ZavrelimyiaAnother Pentaneurini genus with lotic larvae; separation requires examination of the larval mentum and mandible structure, as well as adult hypopygial characters.

• Chironomidae
• Tanypodinae
• Pentaneurini
• non-biting midges
• aquatic insects
• lotic

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