A lichen recently described from the British Isles (Orange 2009). It is clearly distinguishable from similar species of the genus by its occurrence on periodically inundated rocks and stones, where it is lichenicolous on Staurothele fissa. In the Czech Republic it has so far been found only on andesite and spilite rocks in the Berounka River, under the Týřovické skály Rocks and Čertova skála (Vondrák, unpubl.), where the host is also abundant. Stony and rocky shores, suitable for P. cinereoatratum, are rare in the Czech Republic, and therefore the species is probably rare.
Literature:Orange A. (2009): Two parasitic species of Placopyrenium (Verrucariaceae) from freshwater habitats in north-west Europe. – Lichenologist 41: 131–139.taxonomic classification:
All records: 2, confirmed 2. One click on a selected square displays particular record(s), including their source(s).