الملخص

Six Ostracode species belonging to the Trachyleberididae and Xestoleberididae are recorded for first time from Avanah Formation (M.Eocene), Dohuk area, Northern Iraq.These species are: Uroleberis globosa Ducasse 1967, Uroleberis sp., Acanthocythereis (Canthylocythereis) heijranensis sp. nov. Acanthocythereis (Canthylocythereis) sp., Acanthocythereis (Canthylocythereis) alacer Al-Furaih 1992, and Anommatocythereis beserensis sp. nov.