Species profile: Cyrnus insolutus

July 27, 2016

Cyrnus insolutus McLachlan, 1878

Cyrnus insolutus is one of eleven members of the Family Polycentropodidae found in Ireland, and one of three of the genus Cyrnus. It is a species whose larvae can be found in lakes. Its substratum preference is mainly for plants and mosses. It can be found in brackish water areas.

Its feeding ecology is predominantly predation, with a small amount of passive filter feeding, using tubular nets attached to plants.

Characteristic features of the larva of Cyrnus insolutus include a basal membranous section of the anal proleg equal in length to the distal sclerotized section, the four blunt teeth on the inside of the anal claws, the dorsal surface of the head without a dark band and the light area in the centre of the frontoclypeus not including any spots of the posterior row.

Adults of Cyrnus insolutus can be found on the wing from July to August.

There are currently no records of Cyrnus insolutus on the National Biodiversity Data Centre mapping system. This species in only known in Ireland from Lough Derrygeeha, Co. Clare.

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.

O’Connor, J.P. (2015) A Catalogue and Atlas of the Caddisflies (Trichoptera) of Ireland. Occasional Publication of the Irish Biogeographical Society, No. 11.

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.

Last updated: 27/07/2016

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