Revision of the genus Caucasocressa from the eastern Pontic Region (Gastropoda: Hygromiidae)

The genus Caucasocressa is revised. Ten Caucasocressa species are known from north-east Turkey and south-west Georgia. Five new species are described. For every taxon the shell is described and illustrated and the variability of the genitalia (as far as known) is shown. All synonyms are listed. The distribution is summarized and all locality records are listed. The distribution of the species is illustrated on a UTM grid-map.