title: Description of the larval stage ofDrusus mixtus(Pictet, 1834) (Trichoptera: Limnephilidae: Drusinae) with notes on its ecology and zoogeography.
abstract: In the Swiss Jura adults ofDrusus mixtusand unknown Drusinae larvae which could not be identified with existing keys were sampled. Based on ripe pupae, the unknown larvae were identified asD. mixtus. The association was confirmed by specimen rearing in aquaria. Based on morphology, larvae ofDrusus mixtuskey out together withD. croaticusin existing keys.D. mixtusis separated from the latter species by the shape of the anteromedian metanotal sclerites which are broadly triangular, whereas inD. croaticusthe sclerites are almost parallel-sided, resembling a stretched rectangle. In addition, the two species are geographically well separated:D. croaticusis restricted to the confines of Croatia and Slovenia, whereasD. mixtusis only present in Switzerland and eastern France. With this present paper, all Central European Drusinae species exceptDrusus chapmaniMcL, 1901 (France, Switzerland) andD. noricusMalicky, 1981, an endemic from the Saualpe (Carinthia, Austria), are known in the larval stage.
authors.affiliation: Department of Limnology, University of Vienna, Austria.
authors.forename: Johann
authors.initials: J
authors.lastname: Waringer
authors.affiliation: Institute of Hydrobiology and Aquatic Ecology Management, University of Natural Resources and Applied Life Sciences, Vienna, Austria.
authors.forename: Wolfram
authors.initials: W
authors.lastname: Graf
authors.affiliation: Augustenstraße 42, Rostock, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Pitsch
authors.affiliation: Biodiversity and Climate Research Centre (LOEWE BiK-F), Frankfurt a.M., Germany.
authors.forename: Steffen U
authors.initials: SU
authors.lastname: Pauls
authors.affiliation: Department of Biology, Faculty of Science, University of Zagreb, Zagreb, Croatia.
authors.forename: Ana
authors.initials: A
authors.lastname: Previšić
authors.affiliation: Department of Biology, Faculty of Science, University of Zagreb, Zagreb, Croatia.
authors.forename: Mladen
authors.initials: M
authors.lastname: Kučinić
keywords: Drusus mixtus; Trichoptera; description; distribution; ecology; fifth instar larva; identification