Cheilosia impressa

Cheilosia impressa is a Palearctic species of hoverfly. Like most members of its genus C. impressa is a rather small, dark insect and identification can be problematic.[1][2]

Cheilosia impressa
female
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Insecta
Order:
Diptera
Family:
Syrphidae
Subfamily:
Eristalinae
Tribe:
Rhingiini
Genus:
Cheilosia
Species:
C. impressa
Binomial name
Cheilosia impressa
Loew, 1840

Description

External images For terms see Morphology of Diptera

Wing length 5·75–8 mm. A broadly built species. Thorax coarsely punctate, shining, undusted. Legs black Wing base yellow. Coxa 1 with a hornlike projection at the base of the outer side. Facial knob rounded. Part of the impressa species group. The larva is figured by Schmid (1999) [3][4] [5][6]

Distribution

Present in most of Europe and in the East Palearctic ecozone.[7] East to Siberia.[8]

Biology

Habitat: Deciduous forest, wetland, open areas in deciduous forest, montane, unimproved grassland, grassland up to above 2,000m in the alpine zone, fen. Flowers visited include white Umbelliferae, Compositae. Cirsium, Euphorbia, Filipendula, Geranium, Mentha, Prunus, Ranunculus, Rubus. Flight period is May to July and August to September.[9][10]

gollark: Yes, most.
gollark: * would prevent some of it
gollark: It's not really enforcable.
gollark: Asking for assistance on eggs, I mean.
gollark: Isn't it opt-in?

References
  1. Stubbs, Alan E.; Falk, Steven J. (1983). British Hoverflies: An Illustrated Identification Guide. British Entomological & Natural History Society. p. 251, xvpp.
  2. Van Veen, M.P. (2004). Hoverflies of Northwest Europe, Identification Keys to the Syrphidae (hardback). Utrecht: KNNV Publishing. p. 254. ISBN 90-5011-199-8.
  3. Schmid, U. (1999) Die Larve von Cheilosia impressa (Diptera: Syrphidae). Volucella 4: 113-119.
  4. Van 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.
  5. 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. ISBN 81-205-0080-6.
  6. Coe, R.L. (1953) Diptera: Syrphidae. Handbks.ident.Br.insects, 10(1): 1-98. R.ent.Soc.London. pdf
  7. Fauna europaea
  8. Peck, L.V. (1988) Syrphidae. In: Soos, A. & Papp, L. (eds.) Catalogue of Palaearctic Diptera, 8: 11-230. Akad.Kiado, Budapest.
  9. de Buck, N. (1990) Bloembezoek en bestuivingsecologie van Zweefvliegen (Diptera, Syrphidae) in het bijzonder voor België. Doc.Trav. IRSNB, no.60, 1-167.
  10. Speight, M.C.D. (2011). "Species accounts of European Syrphidae (Diptera)" (PDF). Syrph the Net, the database of European Syrphidae. 65: 285pp.
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