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The larva of Drusus vespertinus Marinković-Gospodnetić 1976 (Trichoptera: Limnephilidae)

In this poster presentation, the fifth instar larva of Drusus vespertinus Marinković-Gospodnetić 1976 is described and illustrated. As most Drusinae, D. vespertinus is a cold-water tolerant species distributed in springs and crenal sections of the streams. It is one of seven species endemic to the Dinaric region that belong to the bosnicus group. All these species are range-restricted endemics, closely related and highly similar in adult and larval morphology. However, larvae of the majority of them have hitherto remained undescribed. Hence, here we give the most important diagnostic features that enable separation of D. vespertinus larva from larvae of the other species from the bosnicus group, but also from the other Drusinae. Overall, larva of D. vespertinus is distinguished from the other Drusinae by the presence of spinules (small spines) in the area around the eyes, by specific shape of pronotum and the presence of small white setae on dorsal surface of pronotum.

Drusinae; description; distribution; Balkan Peninsula

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