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Faunistic composition of aquatic dance flies (Diptera, Empididae: Clinocerinae ; Hemerodrominae) of the river Cetina

The research of aquatic dance flies fauna on the river Cetina was conducted during May, June, July, August and September 2005 and during March and April 2006. The samples were collected with an aspirator and entomological net on 9 different locations through the whole flow of the river Cetina and on the springs of three tributaries, spring Sveti Spas, spring of river Ruda and spring of river Grab. The purpose of the research was to determine the diversity of the aquatic dance flies (Diptera, Empididae: Clinocerinae, Hemerodromiinae) and to determine which of the researched locations has the biggest diversity of aquatic dance flies. In two subfamilies 20 species of aquatic dance flies were recorded from 5 different genera, 3 of which belong to the subfamily Clinocerinae (Clinocera, Wiedemannia, Dolichocephala) and 2 to the subfamily Hemerodromiinae (Hemerodromia, Chelifera). Location with the biggest diversity is location Radmanove mlinice, near the mouth of the river Cetina, 10 species were recorded, 9 species from 3 genera of the subfamily Clinocerinae (Clinocera, Wiedemannia, Dolichocephala) and 1 species from the genus Hemerodromia of the subfamily Hemerodromiinae. Species Wiedemannia (Wiedemannia) bistigma was not recorded on Balkan peninsula for 108 years (Strobl, 1898), that is why this is a very significant record, as well as the findings of species Wiedemannia (Philolutra) kacanskae, which is the first finding outside Bosnia, until now this species was only known from two locations in the middle Bosnia (Horvat, 1993). 11 species were not yet recorded in Croatian fauna and therefore are important and new findings for Croatia.

Empididae; fauna; Cetina; Croatia

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