Species profile: Phryganea grandis

February 7, 2016

Phryganea grandis Linnaeus, 1758

Phryganea grandis is one of eight members of the Family Phryganeidae found in Ireland, and one of two representatives of the genus. It is a species whose larvae can be found in ponds, lakes, canals and slow-moving rivers. Its substratum preference includes woody debris, coarse and fine particulate organic matter, plants and mud. The species shows a preference for acid waters and can occur in brackish waters.

Phryganea grandis has a univoltine reproductive cycle (one generation per year) in temperate regions and lives less than one year. Its feeding ecology is mainly predatory, with some shredding of fallen leaves and plant material, gathering of fine particulate organic matter (FPOM), and grazing.

Characteristic features of the larva of Phryganea grandis include the largely unsclerotized mesodorsum and metadorsum, the presence of lateral and dorsal protuberances on the 1st abdominal segment, parietal bands converging around the back of the head and extending forward as far as the mandibles, the absence of a prosternite, and the coxal combs of the 1st and second legs arranged in four or more irregular longitudinal rows.

Adults of Phryganea grandis can be found on the wing from May to September.

Records of Phryganea grandis on the National Biodiversity Data Centre website can be found here.

Phryganea grandis


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: 05/06/2018


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s

%d bloggers like this: