Species profile: Athripsodes bilineatus

September 7, 2016

Athripsodes bilineatus (Linnaeus, 1758)

Athripsodes bilineatus is one of 24 members of the Family Leptoceridae found in Ireland, and one of five members of the genus Athripsodes. It is a species whose larvae can be found in streams, rivers, and lakes, on a substratum of fine gravel to cobble. Athripsodes bilineatus has a curved case made of sand grains. The species has no preference in terms of water pH.

In temperate areas, Athripsodes bilineatus has a univoltine (one generation per year) reproductive cycle, and lives for up to one year. In terms of feeding, this species mainly a shredder, with some gathering and predation.

Defining features of the larvae of Athripsodes bilineatus include a mesonotum with dark, curved posterior-lateral projections, mandibles no more than twice as long as wide, a triangular ventral apotome, no dagger-shaped setae on the anterior face of the 3rd leg trochanter and femur, the ventral edge of the tibia of the 1st leg with only a single strong setae at the distal corner, a subocular ecdysial line that makes a pale gap in the dark posterior ridge of the head capsule and the median pit on the anterior of the labrum separate from the dark mark.

The adults of Athripsodes bilineatus can be found on the wing from May to August (September).

There are currently no records of Athripsodes bilineatus on the National Biodiversity Data Centre mapping system.

References

Barnard, P. and Ross, E. (2012) The Adult Trichoptera (Caddisflies) of Britain and Ireland. RES Handbook Volume 1, Part 17.

Graf, W., Murphy, J., Dahl, J., Zamora-Muñoz, C. and López-Rodríguez, M.J. (2008) Distribution and Ecological Preferences of European Freshwater Species. Volume 1: Trichoptera. Astrid Schmidt-Kloiber & Daniel Hering (eds). Pensoft, Sofia-Moscow.

Wallace, I.D., Wallace, B. and Philipson, G.N. (2003) Keys to the Case-bearing Caddis Larvae of Britain and Ireland. Scientific Publication of the Freshwater Biological Association No. 61.

Last updated: 07/09/2016

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