Gyalectidium laciniatum

About

Gyalectidium laciniatum is a species of lichen in the family Gomphillaceae. It is a leaf-dwelling lichen known from Central and South America, including Costa Rica, Bolivia, and Brazil. The species is characterized by its distinctive irregularly fringed or cut reproductive structures that arise from crescent-shaped whitish crystalline bulges on the thallus surface, giving it an intermediate appearance between related species with simpler and more elaborate scale forms.

Summary from Wikipedia