Lichenopeltella santessonii

Lichenopeltella santessonii is a species of lichenicolous fungus (a fungus that grows on lichens) belonging to the class Dothideomycetes. It forms small, dark fruiting bodies on various lichen species, primarily those in the genus Peltigera, and has been documented in several Nordic countries including Finland, Sweden and Iceland. The fungus can be distinguished from related species by its larger spore-producing structures and spores....read more on Wikipedia.