Phenacophragma oezeri n. sp. (phylum Foraminifera, family Mayncinidae) is described from the Albian shallow-marine limestones of the Geyik Daği area, Central Taurides, S Turkey. It is characterized by a lenticular, completely involute test with eight to nine wedge-shaped chambers in the last whorl rapidly increased in height and by an areal and small slit-like aperture. It occurs in benthic foraminiferal wackestone/packstone and grainstone microfacies with gastropods, rudists and dasycladalean algae, in association with mainly Protochrysalidina elongata, Pseudonummoloculina aurigerica, Pseudonummoloculina heimi, Mayncina bulgarica, Mesorbitolina gr. texana, Cuneolina sliteri, Cuneolina parva, Akcaya minuta, and Akcaya auruncensis. This new species differs from the type species Phenacophragma assurgens in having a completely involute and lenticular test with less numerous chambers in the last whorl. It can be distinguished from the accompanied Mayncina bulgarica by its more axially compressed lenticular shape and its wedge-shaped (rather than falciform) chambers.