Species profile: Ceraclea dissimilis

January 6, 2017

Ceraclea dissimilis (Stephens, 1836)

Ceraclea dissimilis is one of 24 members of the Family Leptoceridae found in Ireland, and one of six members of the genus Ceraclea. It is a species whose larvae can be found in rivers, large streams and occasionally lakes, on a substratum of rocks, as well as submerged tree roots, preferring moderate currents. The curved case of Ceraclea dissimilis is made of sand grains and has an overhanging dorsal lip. The species has no preference in terms of water pH, and can tolerate brackish water.

In temperate areas, Ceraclea dissimilis has a univoltine (one generation per year) reproductive cycle, and lives for up to one year. In terms of feeding ecology, the larvae is split between shredding and gathering.

Defining features of the larvae of Ceraclea dissimilis include a mesonotum with dark, curved posterior-lateral projections, mandibles no more than twice as long as wide, a quadrangular ventral apotome (though small larvae may have a squat, rounded triangle-shaped apotome), mesoventer lacking setae, metaventer with two or more setae on each side, dorsum of 9th abdominal segment with two groups of three short setae, and anal proleg claws with two accessory hooks.

The adults of Ceraclea dissimilis can be found on the wing from June to September.

For details of records of Ceraclea dissimilis, 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: 06/01/2017

 

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