We present the main characteristics of the ostracod assemblages of the Maeotian and Pontian stages in the Badislava-Topolog area (Getic Depression). The Maeotian ostracods fauna is represented by few species that populated ephemeral aquatic environments. The Pontian ostracod fauna is more diverse with species that developed in stable brackish lakes. This Pontian fauna is characteristic of the Upper Pontian (Bosphorian) stage. Our results indicate that the Maeotian / Pontian boundary in Arges-Topolog region is marked by a hiatus comprising the latest Maeotian, Early and Middle Pontian. This hiatus is probably caused by erosional processes during the Middle Pontian (Portaferrian) sea level drop in the Dacian Basin and local tectonic processes. © 2011, National Research and Development Institute for Marine Geology and Geoecology. All rights reserved.