Species profile: Tinodes unicolor

January 18, 2017

Tinodes unicolor (Pictet, 1834)

Tinodes unicolor is one of nine members of the Family Psychomyiidae found in Ireland, and one of five members of the genus Tinodes. It is a species whose larvae can be found in streams, on a substratum of gravel to bedrock, building galleries on rock surfaces in moderate to fast-flowing waters. The species shows a preference for alkaline water.

In terms of feeding ecology, the larvae are predominantly grazers, with some gathering and passive filter feeding.

Defining features of the larvae of Tinodes unicolor include a lack of abdominal gills, labrum comprising a sclerotized plate, lateral plates on the 2nd and 3rd thoracic segments small, anal prolegs with almost no basal membranous section, pronotum lacking a black thickening towards the posterior-lateral corner, anterior section of 1st leg coxopleurite with two vertical black bars, pronotum lacking ovoid yellow markings, and labrum uniformly pale.

Adults of Tinodes unicolor have only been found on the wing in July in Ireland, while in Britain the flight period is described as June to September.

For details of records of Tinodes unicolor, visit the National Biodiversity Data Centre page here.

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.

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: 18/01/2017

 

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