Terrestrial snails (Mollusca: Gastropoda terrestria) of Dugi otok (Croatia)

In field research into Dugi otok outside the confines of Telascica Nature Park, and two northern islets (Mali Lagan, Veli Lagan) we found 35 species of terrestrial snails with shells. Of these, 33 species had been recorded in the literature with reference to Dugi otok, including the surrounding southern islets that form part of Telascica Nature Park. Cepaea vindobonensis and Hygromia cinctella are species that have been newly found. Our investigations did not reveal 10 species that are cited in the literature. We considered that two taxa (Delima blanda conspurcata, Cepaea nemoralis) do not live on the island and the islets stated, while the remaining eight taxa (Vallonia costata, Granopupa granum, Truncatellina claustralis, Agathylla lamellosa, Delima edmibrani, Testacella scutulum, Cochlicella acuta, Chilostoma setosa) are held to be certain denizens of Dugi otok, which we did not find because our investigations were not systematic enough or because they do not live outside the area in which they were recorded (Telascica Nature Park). Among the species that attract particular attention are: Delima edmibrani, which is narrowly endemic to Dugi otok; Agathylla lamellosa, of which this is the northernmost finding site; Chondrina spelta ventilatoris, because it is the westernmost finding site; and Testacella scutulum and Paralaoma servilis, because they are found so seldom in Croatian malacofauna. Dugi otok, with the surrounding islets and rocks mentioned, has a total of 43 species, which constitutes, in comparison with other islands of the eastern Adriatic, a relatively rich terrestrial malacofauna.