Stegobolus

About

Stegobolus is a genus of lichen-forming fungi in the family Graphidaceae. Established in 1845 by the French botanist Camille Montagne, the genus contains 16 species distinguished by their unique fruiting structures that initially appear drum-shaped and closed, later bursting open by shedding their roof-like covering. These bark-dwelling lichens are found in humid tropical and warm temperate forests worldwide, where they serve as indicators of undisturbed woodland habitats due to their sensitivity to canopy opening and drought.

Summary from Wikipedia