First record of Amphorellopsis tetragona ( Protozoa: Ciliophora: Tintinnina)

Amphorellopsis tetragona was reported for the first time from the Sea of Marmara and contributed to the regional check-list of the plankton species of Turkish seas. The specimen was collected on 17 October 2008 from surface neritic waters with a depth of 30m in the research area. The primary hydrographic parameters, temperature 17 oC, salinity 27 ppt and dissolved oxygen 5 mg l -1 , were recorded at the sampling station.