Small Neogene basins within the Dinarides were never invaded by marine transgressions during their evolution. The fresh-water sedimentation, endemic fauna and their position between the Adriatic region and the Pannonian Basin System explain why these basins have not been considered as parts of the Mediterranean or Central Paratethys realm. The correlation of sediments and fauna of these fresh-water basins with the Pannonian Basin System and Adriatic region suggests that Dinaridic fresh-water basins may be considered as a part of the Central Paratethys. This consideration locates the southwestern boundary of Central Paratethys within the High Karst Belt.