Chaetopteryx villosa (Fabricius, 1798)

Chaetopteryx villosa is one of 39 members of the Family Limnephilidae found in Ireland, and the sole member of the genus Chaetopteryx. It is a species whose larvae can be found in rivers, streams and small upland lakes. Its substratum preference includes particulate organic matter, and stony material from gravel to boulders, in slow-flowing and standing water. Chaetopteryx villosa has a case that can be made entirely of plant fragments, but often incorporates coarse sand. The larvae have a preference for acidic water.

In temperate areas, Chaetopteryx villosa generally has a univoltine (one generation per year) reproductive cycle, but this may extend to two years. The feeding ecology of its larvae is predominantly shredding, with some grazing, gathering and predation.

Characteristic features of the larva of Chaetopteryx villosa include a prosternal horn, dorsal protuberance on the 1st abdominal segment, antenna midway between the eye and the anterior head margin, gills with only single filaments, two anterior-median sclerites on the metadorsum, mandibles with teeth along the edges, no setae proximal to the large primary seta on the femurs of the 2nd and 3rd legs, 1st abdominal protuberance lacking anterior setae, but with a large posterior sclerite with 1-3 holes, and anterior intermediate setae of 9th abdominal sclerite shorter than the central intermediate setae. Further separation from Potamophylax rotundipennis depends on head-width and other features.

Adults of Chaetopteryx villosa can be found on the wing from September to October (December).

For details of distribution records of Chaetopteryx villosa in Ireland available through the National Biodiversity Data Centre mapping system, click 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: 15/07/2017

Limnephilus incisus Curtis, 1834

Limnephilus incisus is one of 39 members of the Family Limnephilidae found in Ireland, and one of 23 members of the genus Limnephilus. It is a species whose larvae can be found in pools, lakes and slow-flowing ditches, which may shrink or dry out in summer. Limnephilus incisus has a straight case made from abutted or overlapping pieces of plant material. Its larvae show a preference for neutral to alkaline waters.

The feeding ecology of the larvae of Limnephilus incisus is predominantly shredding, with some predation and grazing.

The larvae of Limnephilus incisus cannot be reliably separated from the larvae of Limnephilus affinis, so adult material is required.

Adults of Limnephilus incisus can be found on the wing from May to September, with a summer diapause.

For details of published records of Limnephilus incisus, 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 14/07/2017

Limnephilus affinis Curtis, 1834

Limnephilus affinis is one of 39 members of the Family Limnephilidae found in Ireland, and one of 23 members of the genus Limnephilus. It is a species whose larvae can be found in pools, lakes and slow-flowing ditches, as well as brackish habitats such as saltmarsh pools and lagoons. Limnephilus affinis has a straight case made from abutted or overlapping pieces of plant material, or may be slightly curved where sand grains are incorporated. Its larvae can occur in brackish water.

The feeding ecology of the larvae of Limnephilus affinis is predominantly shredding, with some predation and grazing.

The larvae of Limnephilus affinis cannot be reliably separated from the larvae of Limnephilus incisus, so adult material is required.

Adults of Limnephilus affinis can be found on the wing from April to October, with a summer diapause.

For details of published records of Limnephilus affinis, 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 13/07/2017

Limnephilus flavicornis (Fabricius, 1787)

Limnephilus flavicornis is one of 39 members of the Family Limnephilidae found in Ireland, and one of 23 members of the genus Limnephilus. It is a species whose larvae can be found in lakes, ponds and pools. Its substratum preference includes plant material, particulate organic matter, sand and gravel, in standing and slow-flowing water. Limnephilus flavicornis has a case made from thin sections of plant material arranged tangentially. Its larvae can occur in brackish water and shows no preference for pH.

In temperate areas, Limnephilus flavicornis has a univoltine (one generation per year) reproductive cycle. The feeding ecology of its larvae is predominantly shredding, with some predation and grazing.

Characteristic features of the larva of Limnephilus flavicornis 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, both 1st leg femur ventral setae pale, anterior third of pronotum darker than the remaining two-thirds, and the proventer with lateral sternites separate from the prosternite, which is well-defined and has an area darker than the lateral sternites.

Adults of Limnephilus flavicornis can be found on the wing from May to November, with a summer diapause.

For details of published records of Limnephilus flavicornis, 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 12/07/2017

Limnephilus stigma Curtis, 1834

Limnephilus stigma is one of 39 members of the Family Limnephilidae found in Ireland, and one of 23 members of the genus Limnephilus. It is a species whose larvae can be found in ponds and marshes. Its substratum preference includes plant material, particulate organic matter, mud and sand, in standing water. Limnephilus stigma has a distinctive case made from sections of blades of grass. Its larvae can occur in brackish water and shows no preference for pH.

The feeding ecology of the larvae of Limnephilus stigma is predominantly shredding, with some predation and grazing.

Characteristic features of the larva of Limnephilus stigma 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, both 1st leg femur ventral setae pale, anterior third of pronotum darker than the remaining two-thirds, and the proventer with dark lateral sternites separate from the much paler  and poorly defined prosternite.

Adults of Limnephilus stigma can be found on the wing from May to October, with a summer diapause.

For details of published records of Limnephilus stigma, 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 11/07/2017

Limnephilus marmoratus Curtis, 1834

Limnephilus marmoratus is one of 39 members of the Family Limnephilidae found in Ireland, and one of 23 members of the genus Limnephilus. It is a species whose larvae can be found in a wide range of habitats including rivers, lakes, ponds, bog pools and ditches. Its substratum preference includes plant material, particulate organic matter, mud and sand, in standing or, occasionally, slow-flowing water. Limnephilus marmoratus has a case made of plant fragments. Its larvae can occur in brackish water.

In temperate areas, Limnephilus marmoratus has a univoltine (one generation per year) reproductive cycle. The feeding ecology of its larvae is predominantly shredding, with some predation and grazing.

Characteristic features of the larva of Limnephilus marmoratus 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, both 1st leg femur ventral setae pale, anterior third of pronotum darker than the remaining two-thirds, proventer  with lateral sternites fused with prosternite, additional setae present on femoral faces of 2nd and 3rd legs and no gills on the 8th abdominal segment.

Adults of Limnephilus marmoratus can be found on the wing from June to October, with a summer diapause.

For details of published records of Limnephilus marmoratus, 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 10/07/2017

Trichostegia minor (Curtis, 1834)

Trichostegia minor is one of seven 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 temporary pools and ditches in woods and fens. Its substratum preference includes coarse and fine particulate organic matter and plants/leaf litter and its case is constructed from pieces of dead leaves arranged longitudinally. The larvae are found in still waters and have no preferences for pH.

Trichostegia minor has a univoltine reproductive cycle (one generation per year) in temperate regions and lives less than one year. Its feeding ecology is spread across predation, grazing, shredding of fallen leaves and plant material, and gathering of fine particulate organic matter (FPOM).

Characteristic features of the larva of Trichostegia minor include the largely unsclerotized mesodorsum and metadorsum, the absence of a dorsal protuberance on the 1st abdominal segment, and parietal and fronto-clypeal bands that are broad and contiguous for much of their length.

Adults of Trichostegia minor can be found on the wing in the period June to July.

This species was confirmed for the Irish list in 2017 (O’Connor & McNaughton, 2017). As yet there are no records of Trichostegia minor 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. and McNaughton, C. (2017) The caddisfly Trichostegia minor (Curtis, 1834) (Trichoptera: Phryganeidae) confirmed as an Irish species. Entomologist’s Record and Journal of Variation 129: 147-150.

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 10/07/2017