British Insects: the families of Caddis flies (Trichoptera)

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L. Watson and M. J. Dallwitz

Glossosomatidae Ulmer

Adults. Antennae much shorter than the fore-wings to about as long as the fore-wings; stout, or slender. Ocelli present. Maxillary palps 5 segmented. The maxillary palps of males 5 segmented.

The fore-wings 5–10 mm long; with a discoidal cell; apical forks 5 (all present). The hind-wings similar in width to the fore-wings; with a discoidal cell, or without a discoidal cell; apical forks 3 (only 2, 3 and 5 in Agapetus), or 4 (1, 2, 3 and 5).

Front tibia 2 spurred. Middle tibia 4 spurred. Hind tibia 4 spurred.

Larvae. The larvae constructing and living in transportable cases (or at least, bearing them: the cases in the form of simple saddles made of small stones, covering only the middle portion of the body); campodeoid. The mesonotum sclerotized (Agapetus), or entirely membranous. The metanotum sclerotized (Agapetus), or entirely membranous; in Agapetus, divided longitudinally into two sclerites. Abdominal segment 1 without retractable papillae. The larva with the terminal abdominal prolegs free of one another.

British representation. 6 species. Genera: Agapetus, Glossosoma.

Illustrations. • Agapetus and Glossosoma: wing venation and tibial spurs. • Agapetus fuscipes: larva and case.


To view the illustrations with detailed captions, go to the interactive key. This also offers full and partial descriptions, diagnostic descriptions, differences and similarities between taxa, lists of taxa exhibiting or lacking specified attributes, and distributions of character states within any set of taxa.

Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 2003 onwards. British insects: the families of Caddis flies (Trichoptera). Version: 29th December 2011. http://delta-intkey.com’.

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