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Orthonevra geniculata
Species of fly From Wikipedia, the free encyclopedia
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Orthonevra geniculata is a species of hoverfly found in the Palearctic.[1][2]
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Description
External images
For terms see Morphology of Diptera
Wing length 4·5-5·5 mm. Face with triangular white marks. Legs yellow. Wing vein r-m brown. Pterostigm bicolorous: pale with dark area at base. Maibach et al. (1994) figure the male terminalia.[3]
See references for determination.[4][5][6][7]
Distribution
Palearctic North Norway to Belgium. Ireland East through North Europe and Central Europe. North Italy. European Russia to the Russian Far East, Siberia and Mongolia. [8][9]
Biology
Habitat: Quercus forest (beside springs, flushes and brooks). Alnus and Salix habitats carr, fen and margins of raised bogs.[10] Flowers visited include Anemone nemorosa, Bellis, Caltha, Cardamine, Malus sylvestris, Menyanthes, Prunus spinosa, Ranunculus, Salix, [11] The flight period is mid April to mid May.The larva is associated with springs and wet flushes.
References
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