Arthonia subfuscicola

Parasitic in the thallus and apothecia of Lecanora carpinea, only recorded from Scotland so far. See http://fungi.myspecies.info/all-fungi/arthonia-subfuscicola, https://www.britishlichensociety.org.uk/lichenicolous-fungi and https://www.britishlichensociety.org.uk/sites/default/files/Arthoniacea…