Ibisia marginata

Ibisia marginata, the black-legged water-snipefly, is a species of ibis flies belonging to the family Athericidae, a small family very similar to the Rhagionidae (snipe flies).[1]

Ibisia marginata
Ibisia marginata. Male
Female
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Insecta
Order:
Diptera
Family:
Athericidae
Genus:
Ibisia
Species:
I. marginata
Binomial name
Ibisia marginata
(Fabricius, 1781)
Synonyms
  • Bibio marginata Fabricius, 1781
  • Ibisia atherix (Donovan, 1813)
  • Musca atherix Donovan, 1813

Distribution

This species is present in most of Europe (Albania, Austria, Belgium, Bosnia and Herzegovina, British Islands, Bulgaria, Croatia, Czech Republic, Denmark, France, Germany, Hungary, Ireland, Italy, Poland, Portugal, Romania, Slovakia, Spain, Switzerland and The Netherlands).[2]

Description

The body is quite slender, eyes are rounded and well separated, antennae are trisegmented, costae are extended around the whole wings, and the abdomen has several dark and clear stripes. The legs are entirely black (hence the common name).

Biology

Adults can be found from May to Augusty. Adult females gather in large clumps and lay egg masses on tree branches or under bridges over flowing waters. In such a way, the first-stage larvae will fall into the water, where they start their lives. The larvae are aquatic and saprophagous. They show 6-8 abdominal segments.[3]

Habitat

These ibis flis are usually found alongside shallow rivers and streams, especially in hilly areas., where the larvae develop as predators.[4]

Further reading
  • Stubbs, A. and Drake, M - British Soldierflies and Their Allies: A Field Guide to the Larger British Brachycera, pp. 512 - British Entomological and Natural History Society
  • A. Minelli – La fauna in Italia – Touring Editore
  • Di Paul S. Giller, Björn Malmqvist - The biology of streams and rivers – Oxford University Press

References
  1. L. Watson and M.J. Dallwitz Insects of Britain and Ireland: the families of Diptera
  2. Fauna Europaea
  3. A. Sundermann, S. Lohse, L.A. Beck, P. Haase Key to the larval stages of aquatic true flies (Diptera), based on the operational taxa list for running waters in Germany
  4. Steven Falk Ibisia marginata
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