The dinoflagellate genus Corythodinium (Stein) Loeblich Jr. & Loeblich III and one species belonging to this genus, Corythodinium tesselatum (Stein) Loeblich Jr. & Loeblich III, are reported for the first time from the coastal waters of Turkey (northeastern Mediterranean). | New record of a dinoflagellate species Corythodinium tesselatum (Stein) Loeblich Jr. & Loeblich III from Turkish coastal waters of the north-eastern mediterranean sea