A monograph on the new Miocene gastropod species in the Cairo-Suez district, Egypt

The marine Miocene Gharra Formation in three separate sections along the Cairo-Suez road is generally rich in molluscan remains. The formation, with its four constituent members-the Geneifa Chalky Limestone, the Hommath Sandy Limestone, the Sadat Reefal Limestone and the Agrud Sandstone Members (top to bottom)-has been studied for its fossil gastropod content. Ninety-seven new Miocene gastropod species have been identified, ninety-four of which belong to the subclass Prosobranchiata, two to the subclass Opisthobranchiata and one to the subclass Pulmonata. The range of each of these new species is considered and their respective ages interpreted in the light of previous micropaleontological and microstratigraphical analyses.