Orthonevra geniculata is a species of hoverfly found in the Palearctic.
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.Maibach, A., Goeldlin de Tiefenau, P. & Speight, M.C.D. (1994) Limites génériques et caractéristiques taxonomiques de plusieurs genres de la Tribu des Chrysogasterini (Diptera: Syrphidae) 1.Diagnoses génériques et description de Riponnensia gen.nov. Ann. Soc. Entomol. Fr. (N.S.), 30: 217-247. See references for determination.Van Veen, M. (2004) Hoverflies of Northwest Europe: identification keys to the Syrphidae. 256pp. KNNV Publishing, Utrecht.addendumVan der Goot, V.S. (1981) De zweefvliegen van Noordwest - Europa en Europees Rusland, in het bijzonder van de Benelux. KNNV, Uitgave no.32: 275pp. Amsterdam.Bei-Bienko, G.Y. & Steyskal, G.C. (1988) Keys to the Insects of the European Part of the USSR, Volume V: Diptera and Siphonaptera, Part I. Amerind Publishing Co., New Delhi. .Coe, R.L. (1953) Diptera: Syrphidae. Handbks.ident.Br.insects, 10(1): 1-98. R.ent.Soc.London. pdf
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. Fauna EuropaeaPeck, L.V. (1988) Syrphidae. In: Soos, A. & Papp, L. (eds.) Catalogue of Palaearctic Diptera, 8: 11-230. Akad.Kiado, Budapest.
Biology Habitat: Quercus forest (beside springs, flushes and brooks). Alnus and Salix habitats carr, fen and margins of raised bogs. Flowers visited include Anemone nemorosa, Bellis, Caltha, Cardamine, Malus sylvestris, Menyanthes, Prunus spinosa, Ranunculus, Salix, de Buck, N. (1990) Bloembezoek en bestuivingsecologie van Zweefvliegen (Diptera, Syrphidae) in het bijzonder voor België. Doc.Trav. IRSNB, no.60, 1-167. The flight period is mid April to mid May.The larva is associated with springs and wet flushes.
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