Caddisfly (Insecta: Trichoptera) fauna of Kupa and Cabranka rivers and their tributaries, Gorski kotar, W Croatia

Adult caddisflies were collected monthly from October 2008 to October 2009 at 25 sites along the course of the rivers Kupa and cabranka, and at various habitats in their tributaries. Altogether 38 species were recorded. Regarding the seasonal composition of caddisfly fauna, the highest number of species was recorded in the spring months, followed by the summer period. The occurrence of the most abundant species was mainly in accordance with their typical flight periods. Three species, Rhyacophila palmeni, Wormaldia copiosa and Tinodes rostocki, are new to the caddisfly fauna of Croatia. The current study represents an important contribution to the knowledge of caddisfly fauna of the Gorski kotar region, but also of Croatia in general.