Arthonia pragensis Horáková, a new lichenicolous fungus (Ascomycetes, Arthoniales) is described from xerothermic area growing on diabase rocks in Prague in the Czech Republic. This is also the first published report of a lichenicolous fungus from the territory of Prague.
Horáková J. (1994): Arthonia pragensis spec. nov. (Ascomycetes, Arthoniales), a new lichenicolous fungus from the Czech Republic. – Czech Mycology 47(2): 139–143.