Species profile: Oligotricha striata

January 20, 2016

Oligotricha striata (Linnaeus, 1758)

Oligotricha striata is one of six members of the Family Phryganeidae found in Ireland, and the only representative of the genus. It is a species whose larvae can be found in the still waters of pools and ditches, particularly those with acid peaty water and Sphagnum mosses. The species shows a preference for acid waters and can occur in brackish waters.

Oligotricha striata has a univoltine reproductive cycle (one generation per year) in temperate regions and lives less than one year. Its feeding ecology is mainly predatory, with some shredding of fallen leaves and plant material, and gathering of fine particulate organic matter (FPOM).

Characteristic features of the larva of Oligotricha striata include the largely unsclerotized mesodorsum and metadorsum, the presence of lateral and dorsal protuberances on the 1st abdominal segment, almost parallel parietal bands running anterior to posterior on the head and continuous with lines on the abdominal segments.

Adults of Oligotricha striata can be found on the wing from July to August.

There are currently no records of Oligotricha striata on the National Biodiversity Data Centre website. The species has not been recorded in Ireland since 1969.

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.

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

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 31/05/2016

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