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Larval description, molecular and ecological features of Drusus bosnicus (Klapálek, 1898) (Trichoptera: Limnephilidae) with note of distribution

In the Balkan Peninsula (Albania, Bosnia and Herzegovina, Bulgaria, Croatia, Macedonia, Montenegro, Serbia) 38 species from the genus Drusus were recorded so far, a genus distributed over Europe, Asia Minor and the Caucasus. Except the widespread Drusus discolor and Drusus biguttatus, all other species are endemics. Drusus species usually inhabit springs and crenal sections of mountain streams and rivers with low water temperatures. Allopatric inland distribution and isolation of populations are reasons for rapid evolutionary processes of speciation and the high diversity in the genus Drusus, thereby creating the high number of endemic species with very small areas of distribution. One of the most interesting group from genus Drusus is the bosnicus group with numerous endemic species described from the Balkan Peninsula. All species of the bosnicus group share some morphological features like the shape of male genitalia, the dark coloration of adults and daily activity patterns. The first species described at the end of the XIX century from this group is Drusus bosnicus Klapálek, 1898, its locus typicus being the spring of the River Bosna situated in the town of Sarajevo. So far, larvae of 5 species from the bosnicus group from the Balkan Peninsula were described: Drusus klapaleki, D. medianus, D. radovanovici, D. ramae, and D. septentrionis. In this study we present morphological features of the last instar larvae of Drusus bosnicus, combined with molecular and ecological notes and data on the distribution of this species. We also present the most important diagnostic features enabling the separation of larvae of D. bosnicus from larvae of the other European Drusinae species.

Drusine; larval description; ecology; distribution

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