Species profile: Oecetis notata

January 14, 2017

Oecetis notata( Rambur, 1842)

Oecetis notata is one of 24 members of the Family Leptoceridae found in Ireland, and one of five member of the genus Oecetis. It is a species whose larvae can be found in rivers, on a substratum of gravel to boulders, occurring in moderate flows. Oecetis notata has a dorso-ventrally flattened case made of moss leaves. The species has no preference in relation to the pH of the water.

In temperate areas, Oecetis notata has a univoltine (one generation per year) reproductive cycle, and lives for up to one year. In terms of feeding ecology, the larvae are predators.

Defining features of the larvae of Oecetis notata include antennae at least six times longer than wide, a mesonotum without dark, curved posterior-lateral projections, mandibles at least three times as long as wide, with a single cutting edge, labrum with numerous setae on the dorsal surface, mesoventer without setae, metaventer with 1-6 setae, head and thoracic sclerites pale, lacking coloured muscle attachment points, 3rd leg with two long setal fringes to enable swimming, and protrochantin with more than one long, dark seta.

The adults of Oecetis notata can be found on the wing in June to August.

For details of records of Oecetis notata, visit the National Biodiversity Data Centre page here.

Oecetis notata


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: 09/04/2018



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