Rediscovery of Chimarra marginata (Linnaeus, 1767) (Philopotamidae, Trichoptera, Insecta) in the Czech Republic after 80 years

Abstract The ecology and distribution of caddisflies is an important topic with regard to the general biodiversity of insects and also the ecological quality of freshwaters. Our recent rediscovery of Chimarra marginata (Linnaeus) in the Czech Republic took place after more than 80 years and is important from a biomonitoring point of view. We present new data from the Ohře River in western Bohemia and give a review of the historical occurrence of this species in the territory of former Czechoslovakia. Ecological preferences are discussed as well as the potential value of the species for bioindication. This report also emphasizes the importance of regular routine sampling to monitor changes in species diversity.