Species profile: Hydropsyche angustipennis

October 17, 2015

Hydropsyche angustipennis (Pictet, 1834)

Hydropsyche angustipennis is one of nine members of the Family Hydropsychidae found in Ireland, and one of five of the genus Hydropsyche. It is a species whose larvae can be found in rivers and streams, especially at the outflows of lakes and ponds. Its substratum preference ranges from coarse gravel to boulders and bedrock, but includes plant material, in areas with moderate to high current velocities. The species shows a preference for acidic waters.

Hydropsyche angustipennis has a univoltine reproductive cycle (one generation per year) in temperate areas. Its feeding ecology is predominantly passive filter feeding, with some predation and grazing/scraping.

Characteristic features of the larva of Hydropsyche angustipennis include the presence of large, rectangular dorsal plates on all three thoracic segments, tufted gills on the abdominal segments up to and including the 7th segment, the lack of long bristles on the front margin of the pronotum, entirely dark posterior prosternites, and a frontoclypeal pattern of separated aboral and lateral marks.

Adults of Hydropsyche angustipennis can be found on the wing from June to September.

Records of Hydropsyche angustipennis on the National Biodiversity Data Centre website can be found here.

Hydropsyche angustipennis


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

Edington, J.M. and Hildrew, A.G. (1995) A Revised Key to the Caseless Caddis Larvae of the British Isles: with notes on their ecology. Freshwater Biological Association Special Publication No. 53.

O’Connor, J.P. (2015) A Catalogue and Atlas of the Caddisflies (Trichoptera) of Ireland. Occasional Publication of the Irish Biogeographical Society, No. 11.

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.

Last updated: 08/04/2018


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