The Larva of Drusus nigrescens Meyer-Dur, 1875 (Trichoptera : Limnephilidae : Drusinae) with notes on its ecology, genetic differentiation and systematic position

The paper presents a description of the hitherto unknown larva of Drusus nigrescens Meyer-Dur, 1875. Information on the morphological and genetic identification of this species is given, and the most important diagnostic features are illustrated. Its systematic position within the genus Drusus is affirmed and some zoogeographical and ecological notes are added.