Systematic Description Ostracods Fauna from the Lower Tar Member(Zimam Formation) Northern Ghadamis Basin

Ostracods are widely used for geological studies due to their small size, widely distributed, and have had rapidly evolving lineage, so that we have studied these creatures from Zimam Formation (Lower Tar Member) exposed on the southern edge of the Ghadamis Basin in order to systematic accounts of Upper Cretaceous ostracods.
Twenty seven samples were collected and processed from outcrop section north of Al Qaryat Al Sharqhia which belongs to the Lower Tar Member. Lithologically consists of marl, Clay, limestone, and dolomitic limestone with gypsum in parts.
Eighteen species recorded belong to fourteen genera, four species has wide geological distribution in North Africa and the Middle East, one new species proposed (Cytherelloidea dabai) and the remaining species left under open nomenclature, although they shows similarities to earlier described fauna which reported from North Africa and the Middle East.
The ostracods species recording from the Lower Tar Member indicate deep to shallow marine environments.