Mazosia uniseptata

Mazosia uniseptata is a species of foliicolous (leaf-dwelling) lichen in the family Roccellaceae. First described from French Guiana in 2006, it has since been recorded on shaded understory leaves in seasonally dry lowland forest in neighbouring Guyana, extending its known range across the Guianan Shield. The lichen forms a thin, pale green-grey film sparsely clothed in simple hairs and dotted with minute black apothecia (fruiting bodies) that appear faintly translucent when wet. It is readily distinguished from others in its genus by its eight narrowly spindle-shaped ascospores, each divided by a single septum rather than the multiple septa that typify most Mazosia species....read more on Wikipedia.