Species profile: Holocentropus dubius

July 29, 2016

Holocentropus dubius (Rambur, 1842)

Holocentropus dubius is one of eleven members of the Family Polycentropodidae found in Ireland, and one of two of the genus Holocentropus. It is a species whose larvae can be found in ponds, lakes and canals. Its substratum preference is for plants and mosses. It shows a preference acidic water, and can be found in brackish water areas.

Holocentropus dubius lives for up to one year. 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 Holocentropus dubius include a basal membranous section of the anal proleg equal in length to the distal sclerotized section, the tarsus and tibia of the 1st leg of about equal length, right-angled anal claws and no dark bands on the dorsal surface of the head capsule.

Adults of Holocentropus dubius can be found on the wing from May to June.

For distribution records of Holocentropus dubius, visit the National Biodiversity Data Centre page here.

Holocentropus dubius


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.

Last updated: 08/04/2018


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