Chimarra marginata (Linnaeus, 1767)

Chimarra marginata is one of five members of the Family Philopotamidae found in Ireland, and the only member of the genus Chimarra. It is a species whose larvae can be found in larger streams and rivers than the other species in the family, with a substratum preference ranging from coarse gravel to boulders and bedrock.

This species feeds via passive filter feeding, spinning net to catch particulate organic matter.

Notable features of the larvae of Chimarra marginata include presence of a white, membranous structure with a brush-like anterior margin rather than a sclerotized, plate-like labrum that is typical of caddisfly larvae. The species is separated other species in the family by the presence of a deep U-shaped notch in the fronto-clypeus (anterior margin of the head capsule).

Adults of Chimarra marginata can be found on the wing from June to October.

Records for Chimarra marginata on the National Biodiversity Data Centre mapping system can be found here.

References

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.

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.

Prof. Hans Malicky. Chimarra marginata (Linnaeus, 1767). Accessed through: Fauna Europaea at http://www.faunaeur.org/full_results.php?id=411063 on 03/11/2014.

Last updated: 31/05/2016

Glossosoma conformis Neboiss, 1963

Glossosoma conformis is one of five members of the Family Glossosomatidae found in Ireland, and one of two members of the genus Glossosoma, along with Glossosoma boltoni. It is a species whose larvae can be found in streams and rivers with a substratum preference ranging from coarse gravel to boulders and bedrock. Glossosoma conformis has a case made of sand grains held together by silk, but spaces remain between the grains that allow oxygenated water to pass through. The species has no preference with regard to pH of the water.

In temperate areas, Glossosoma conformis has a flexible reproductive cycle and lives for up to one year. In terms of feeding, this species is largely a grazer/scraper, though some gathering/collecting is evident.

Notable features of the larvae of Glossosoma conformis include the passing similarity to uncased species in that they lack case-bearing protuberances on the first abdominal segment and also have elongate lateral sclerites on the anal prolegs. The species is separated from the genus Agapetus by the presence of no more than seven setae along the anterior margin of each side of the pronotum and the absence of median sclerites on the mesodorsum and metadorsum. Separating it from Glossosoma boltoni is by a number of features including the presence of an inconspicuous, pale posterior-lateral seta on the 8th abdominal segment, rather than a dark, conspicuous seta, while the band of pigmentation at the posterior margin of the pronotum, closest to the median suture, is entirely black or the area of brown, posterior to the dark band, is of a lighter shade than that anterior to the dark band.

Adults of Glossosoma conformis can be found on the wing from May to August.

Currently there are no records for Glossosoma conformis 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.

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

Glossosoma boltoni Curtis, 1834

Glossosoma boltoni is one of five members of the Family Glossosomatidae found in Ireland, and one of two members of the genus Glossosoma, along with Glossosoma conformis. It is a species whose larvae can be found in large streams and rivers with a substratum preference ranging from coarse gravel to boulders and bedrock. Glossosoma boltoni has a case made of sand grains held together by silk, but spaces remain between the grains that allow oxygenated water to pass through. The species has no preference with regard to pH of the water.

In temperate areas, Glossosoma boltoni has a flexible reproductive cycle, with a bivoltine (two generations per year) noted, and lives for up to one year. In terms of feeding, this species is largely a grazer/scraper, though some gathering/collecting is evident.

Notable features of the larvae of Glossosoma boltoni include the passing similarity to uncased species in that they lack case-bearing protuberances on the first abdominal segment and also have elongate lateral sclerites on the anal prolegs. The species is separated from the genus Agapetus by the presence of no more than seven setae along the anterior margin of each side of the pronotum and the absence of median sclerites on the mesodorsum and metadorsum. Separating it from Glossosoma conformis is by a number of features including the presence of a dark, conspicuous posterior-lateral seta on the 8th abdominal segment, rather than an inconspicuous, pale seta, while the band of pigmentation at the posterior margin of the pronotum, closest to the median suture, is never entirely black, with brown coloration, similar to the colour of the pronotum anterior to the dark band, particularly notable towards the rear and also towards the median suture.

Adults of Glossosoma boltoni can be found on the wing from (March) April to October.

Records of Glossosoma boltoni on the National Biodiversity Data Centre mapping system can be found 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: 31/05/2016

Agapetus ochripes Curtis, 1834

Agapetus ochripes is one of five members of the Family Glossosomatidae found in Ireland, and one of three members of the genus Agapetus, along with Agapetus fuscipes and Agapetus delicatulus. It is a species whose larvae can be found in rivers. Its substratum preference ranges from coarse gravel to boulders and bedrock. Agapetus ochripes has a case made of sand grains held together by silk, but spaces remain between the grains that allow oxygenated water to pass through. The species has no preference with regard to pH of water.

In temperate areas, Agapetus ochripes has a flexible reproductive cycle and lives for up to one year. In terms of feeding, this species is largely a grazer/scraper, though some gathering/collecting is evident.

Notable features of the larvae of Agapetus ochripes include the passing similarity to uncased species in that they lack case-bearing protuberances on the first abdominal segment and also have elongate lateral sclerites on the anal prolegs. The species is separated from the genus Glossosoma by the presence of more than seven setae along the anterior margin of each side of the pronotum and the presence of median sclerites on the mesodorsum and metadorsum. Separating it from other species of the genus is by the presence of an inconspicuous, pale posterior-lateral seta on the 8th abdominal segment, rather than a dark, conspicuous seta, by the form of the lateral mark on the pronotum, which is short, and the metadorsal sclerite that is intermediate in size between the other two species.

Adults of Agapetus ochripes can be found on the wing from April to September.

Currently there are no records of Agapetus ochripes 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.

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