Dasyhelea

Kieffer, 1911

Dasyhelea is a of comprising the sole genus of the Dasyheleinae. The genus is distinguished within by feeding : adults take nectar exclusively and do not feed on vertebrate blood or on other . are aquatic and possess a characteristic with retractile . The genus is taxonomically complex, with ongoing revisions addressing synonymy and distribution.

Pronunciation

How to pronounce Dasyhelea: /ˌdæziˈhɛliə/

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Identification

are distinguished from other by the presence of retractile on the . are identified by their non-biting mouthparts and nectar-feeding , unlike blood-feeding relatives in Ceratopogonidae.

Appearance

are small, delicate typical of . possess a diagnostic with retractile .

Habitat

are aquatic, developing in various freshwater environments including water-filled leaf axils () of aquatic plants such as Pistia stratiotes. Specific requirements vary by .

Distribution

Europe (with extensive records from Ukraine and Romania), North America, Australia, and South America (Colombia). The has a broad geographic range with -specific distributions.

Diet

feed exclusively on nectar. Larval diet is not documented in available sources.

Life Cycle

are aquatic; stages develop in water-filled . Specific developmental details and pupal characteristics are not documented in available sources.

Behavior

do not feed on vertebrate blood or on other , representing an unusual feeding strategy within . of some show preferential distribution on older leaves of plants.

Ecological Role

serve as for other organisms; Dasyhelea mutabilis has been documented as a host for larval (Tyrrellia circularis).

Similar Taxa

CulicoidesAlso , but are blood-feeding on vertebrates, unlike nectar-feeding Dasyhelea adults
ForcipomyiaAlso ; distinguished by feeding and larval

More Details

Taxonomic complexity

European Dasyhelea has undergone extensive revision, with 17 new synonyms proposed in recent work. Some have been excluded from regional faunas, and have been designated for several nominal species.