The new species Placopyrenium bullatum is described from limestone in Turkey. It is characterized by the immersed ascomata, the areolate and bullate thallus, the often blackened exciple and the 1-septate ascospores. It resembles P. iranicum, but differs by the 1-septate ascospores, the dark exciple and the black mottled medulla. Ig˘dır, lichen, new species, Placidiopsis, taxonomy