Species profile: Hydroptila vectis

August 28, 2019

Hydroptila vectis Curtis, 1834

Hydroptila vectis is one of 28 members of the Family Hydroptilidae found in Ireland, and one of 13 members of the genus Hydroptila. It is a species whose larvae can be found in streams on a substratum of algae. Hydroptila vectis has a case made of sand grains, which is laterally compressed. Only the final instar has a case, and is very different from the earlier instars.

The larvae of most Hydroptilid species are not described. Notable features of the larvae of the genus Hydroptila include a laterally flattened abdomen, which lacks dorsal and ventral ovoid processes, a laterally compressed case made of sand grains (or in one case algal filaments), no sclerotized median point on the labrum, 2nd & 3rd legs at most 1.5 times longer the 1st legs and gill filaments on the anal proleg, the claws of which also have accessory hooks.

Adults of Hydroptila vectis can be found on the wing from June to September.

There are currently no distribution records available for Hydroptila vectis in Ireland through the National Biodiversity Data Centre mapping system.

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. (2019) Hydroptila vectis Curtis, 1834, new to Ireland and the first Irish adult of Tricholeiochiton fagesii (Guinard, 1879) (Trichoptera: Hydroptilidae). Entomologist’s Monthly Magazine 155: 163–167.

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: 01/11/2019

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