Glyphotaelius pellucidus (Retzius, 1783)

Glyphotaelius pellucidus is one of 40 members of the Family Limnephilidae found in Ireland, and the sole member of the genus Glyphotaelius. It is a species whose larvae can be found in rivers, streams, lakes, ponds, marshes and ditches, with fallen deciduous leaves. Its substratum preference includes particulate organic matter and plant material, in standing or slow-flowing water. Glyphotaelius pellucidus has a rather distinctive case made with disks cut from leaves on the dorsal and ventral surfaces.

In boreal areas, Glyphotaelius pellucidus has a multivoltine (more than three generations per year) reproductive cycle, and lives for up to one year. The feeding ecology of the larvae is predominantly shredding, with some predation and grazing.

Characteristic features of the larva of Glyphotaelius pellucidus include a prosternal horn, dorsal protuberance on the 1st abdominal segment, antenna midway between the eye and the anterior head margin, some gills with three or more filaments, anterior or posterior face of at least one femur of the 2nd and 3rd legs with one or more additional setae, two strong setae on the ventral edge of the femur of the 2nd leg, 1st leg femur proximal seta pale, contrasting with the dark distal seta, while the dorsal and/or posterior faces lack additional setae.

Adults of Glyphotaelius pellucidus can be found on the wing from May to October.

For details of published records of Glyphotaelius pellucidus, visit the National Biodiversity Data Centre page here.

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: 15/12/2017

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