Chrysotoxum cautum

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Chrysotoxum cautum
Chrysotoxum cautum Richard Bartz.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Diptera
Family: Syrphidae
Genus: Chrysotoxum
Species:
C. cautum
Binomial name
Chrysotoxum cautum
(Harris, 1776)
Synonyms
  • Chrysotoxum fasciolatum Curtis, 1837
  • Chrysotoxum marginatu Curtis, 1837
  • Musca cautum Harris, 1776

Chrysotoxum cautum is a species of Palearctic hoverfly of the genus Chrysotoxum. The larvae are thought to feed on root aphids. Adults are usually found on the edges of woodland or scrub or along hedgerows where they visit a wide range of flowers, usually in small numbers. [1]

Contents

Identification

C. Cautum has a wing length of 10–13mm. It has an orange stigma, apical antennomere as long as antennomeres 1 and 2 together, a relatively flat abdomen, exceptionally large genitalia, and they reach over the hind margin of sternite 4. [lower-alpha 1]

Biology

C. cautum is a Palearctic species. It has been found in southern Britain, continental Europe and as far as the Altai Mountains and Mongolia.

C. cautum can be found in deciduous forests and scrub, unimproved and lightly grazed grassland, open areas in forest or scrub on well-drained sites. [6]

The hoverfly visits flowers such as white umbellifers; yellow composites, Allium ursinum, Caltha, Cornus, Crataegus, Euphorbia, Geranium, Plantago, Ranunculus, Rhamnus catharticus, Rubus and Sorbus aucuparia. [7] The species' flight period is between May to July (April in southern Europe).

Notes

  1. ↑ Keys and accounts:
    • Coe R.L. (1953) Syrphidae [2]
    • Van Veen, M. (2004) Hoverflies of Northwest Europe [3]
    • Van der Goot,V.S. (1981) De zweefvliegen van Noordwest - Europa en Europees Rusland, in het bijzonder van de Benelux [4]
    • Bei-Bienko, G.Y. & Steyskal, G.C. (1988) Keys to USSR insects. Diptera [5]

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References

  1. ↑ Stubbs, Alan E.; Falk, Steven J. (1983). British Hoverflies: An Illustrated Identification Guide. British Entomological & Natural History Society. pp. 253, xvpp.
  2. ↑ Coe, R.L. (1953) Diptera: Syrphidae. Handbks.ident.Br.insects, 10(1): 1-98. R.ent.Soc.London.pdf Archived 2018-10-04 at the Wayback Machine
  3. ↑ Van Veen, M. (2004) Hoverflies of Northwest Europe: identification keys to the Syrphidae. 256pp. KNNV Publishing, Utrecht.
  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. (1988a) 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. ↑ Speight, M.C.D. (2011). "Species accounts of European Syrphidae (Diptera)" (PDF). Syrph the Net, the database of European Syrphidae. 65: 285pp.
  7. ↑ de Buck, N. (1990) Bloembezoek en bestuivingsecologie van Zweefvliegen (Diptera, Syrphidae) in het bijzonder voor België. Doc.Trav. IRSNB, no.60, 1-167.
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