An inconspicuous lichen with a whitish thallus and pruinose apothecia that contain arthonioic acid (C+ red). The species ecologically resembles Chrysothrix candelaris or Dendrographa decolorans by growing on rough bark, most often on oaks, in natural open lowland forests. However, it may occur also on worked timber. The lichen is currently very rare in central Europe. In the Czech Republic, it was found at two localities near Teplice (Anders 1922) in the past and recently in two old floodplain forest reservations Ranšpurk and Cahnov-Soutok in south Moravia.
Literature: Anders J. (1922): Die Flechten Nordböhmens. III. Nachtrag. – Hedwigia 63: 269–322.
taxonomic classification:Ascomycota → Arthoniomycetes → Arthoniales → Arthoniaceae → Pachnolepia
most frequented synonyms:Arthonia pruinataRed List (Liška & Palice 2010):CR – critically endangered
Red List (Malíček 2023):C1 – critically endangered
Occurrence in the Czech Republic
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