Criorhina fusca
(Weisman, 1964)
Dusky Yellowjacket Fly
Criorhina fusca is a hoverfly in the Syrphidae, described by Weisman in 1964. It is known from the United States. The species belongs to a whose members are notable for their mimicry of yellowjacket (Vespula spp.), a form of that provides protection from . As with other Criorhina species, are likely that visit flowers for nectar and pollen.
Pronunciation
How to pronounce Criorhina fusca: /ˌkraɪəˈraɪnə ˈfʌska/
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Identification
Members of the Criorhina are distinguished from other hoverflies by their robust, -like body form with striking yellow and black patterning that closely mimics yellowjacket wasps. Specific diagnostic features for C. fusca relative to are not documented in available sources. The name "fusca" (Latin for dark or dusky) may indicate darker coloration than related species, but this requires verification.
Distribution
United States.
Ecological Role
As a member of Syrphidae, likely function as . The is known for mimicry, which may reduce pressure and thus increase foraging .
Similar Taxa
- Criorhina berghianaAnother North American Criorhina with similar yellowjacket mimicry; morphological differences in color pattern and body proportions distinguish species, but specific characters for C. fusca are not well documented.
- Vespula spp. (yellowjacket wasps)Criorhina fusca is a Batesian mimic of these ; hoverflies have single pair of wings (Diptera), short , and lack the narrow wasp waist, but visual similarity is striking.
More Details
Taxonomic history
Originally described as Sphecomyia fusca by Weisman in 1964, later transferred to Criorhina. The Sphecomyia is now restricted to a different group of hoverflies.
Data scarcity
Only 3 observations recorded in iNaturalist as of source date, indicating this is a rarely encountered or underreported . No peer-reviewed studies specifically addressing C. fusca were found in provided sources.