Astrothelium subinterjectum

Astrothelium subinterjectum is a species of lichen-forming fungus in the family Trypetheliaceae. The lichen forms an olive-green crust on tree bark with an uneven surface texture. Its reproductive structures are grouped together in rounded to irregular clusters that are covered by greenish tissue and share common openings surrounded by whitish zones. These clusters fluoresce yellow to orange-yellow under ultraviolet light while the surrounding lichen body does not. The species is found in gallery forests within Cerrado landscapes of Brazil, where it has been recorded from São Paulo, Acre, and Mato Grosso states....read more on Wikipedia.