Pyrenula montana is a species of corticolous (bark-dwelling) crustose lichen in the family Pyrenulaceae. Described as a new species in 1997 by André Aptroot, it is found in the Morobe Province of Papua New Guinea. The type specimen was collected by Aptroot from a tree in a mountain forest in the Saruwaged Range in Timbe valley. It has since been recorded in Thailand, its first reported occurrence in the Northern Hemisphere.