Bellemerella

About

Bellemerella is a genus of fungi in the family Verrucariaceae. All four species are lichenicolous, meaning they grow parasitically on other lichens. These microscopic fungi appear as tiny black dots on the surface of their lichen hosts, forming small flask-shaped structures that release spores. Each species targets a specific type of lichen, with the four known species attacking different lichen genera such as Trapelia, Acarospora, and Polysporina.

Summary from Wikipedia