Hydatophylax infumatus (McLachlan, 1865)

Hydatophylax infumatus is one of 40 members of the Family Limnephilidae found in Ireland, and the sole member of the genus Hydatophylax. It is a species whose larvae can be found in rivers, streams and occasionally lakes. Its substratum preference is for particulate organic matter and woody debris, in slow-flowing and standing water. Hydatophylax infumatus has a case made from plant fragments in early instars and dead wood in instar V. The larvae have a preference for acidic water.

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

Characteristic features of the larva of Hydatophylax infumatus 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 and a single anterior-median sclerite on the metadorsum (central area of sclerite may be pale).

Adults of Hydatophylax infumatus have only been found on the wing in Ireland during August, based on a single record, while in Britain the flight period is described as June to July.

For details of distribution records of Hydatophylax infumatus in Ireland available through the National Biodiversity Data Centre mapping system, click here.

Hydatophylax infumatus


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: 09/04/2018