Ocellularia albobullata

Ocellularia albobullata is a rare species of corticolous (bark-dwelling) lichen in the family Graphidaceae. It was described in 2011 from specimens collected in Corcovado National Park on Costa Rica's Osa Peninsula. The lichen forms a distinctive chalky white to light-gray crust with a bumpy, blister-like surface and conspicuous fruiting bodies that sit atop the raised bumps. It is known only from the coastal rainforests of southern Costa Rica, where it grows on tree trunks in old-growth...