LICHENOLOGIST, cilt.44, sa.6, ss.739-741, 2012 (SCI-Expanded)
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.