Buellia epifimbriata is a species of lichenicolous (lichen-eating) crustose lichen in the family Caliciaceae.

The type specimen was collected by Sipman and Thomas Raus, northwest of Hagios Georgios (Antiparos, in the Cyclades archipelago).

The habitat consists of outcrops of schistose rock, on top of coastal hills with low-lying shrubs.

Buellia epifimbriata contains norstictic acid, a lichen product that can be detected using thin-layer chromatography.

It occurs in association with its host, which itself grows on the steep faces of exposed volcanic rocks at elevations between 50 and 200 m (160 and 660 ft).