Order: Pyrenulales       Family: Monoblastiaceae Species: Acrocordia conoidea Growth type crustose. Photos: On limestone. Black Head and Temple Cronan, the Burren, Ireland. BLS meeting April 2009 Smooth or finely granular, pale grey or brownish-grey thallus, often tinged pink. Many large spherical discs, leaving conspicuous pits in thallus. Apices +/- flattened, ostiole projecting. Pycnidia frequent. Chemical reactions negative. Can be abundant on natural hard limestone, also on limestone memorials in old churchyards. Similar: Acrocordia salweyi

Acrocordia conoidea. The Burren. April 2009