Gastropoda from Lower Cretaceous Deposits of Nimbolook Area, Eastern Iran

Early Cretaceous gastropods occur on the eastern margin of Lut Block in Eastern Iran. The gastropod assemblage reported herein is from the Nimbolook section located in the west of Qayen. The section mostly includes marls and limestones. It was dated as Aptian owing to the findings of foraminifers, nannofossils and ammonites. The exposure provides a relatively well-preserved gastropod fauna from marls and limestones. New species Oligoptyxis khorasanica sp. nov. from the family Nerineidae is the first find of the genus in the Cretaceous of Iran. Finally, the new genus Purpuripullina , gen. nov. was proposed. It was previously included in the family Ampullinidae.