Description: Thallus inapparent, not lichenized, forming discoloured patches sometimes delimited by a black line, developing inside the soralia of Flavoparmelia caperata and Cladonia-species. Apothecia arthonioid, immarginate, blackish, punctiform, 0.05-0.1 mm across, immersed in the soralia of the host, solitary or aggregated in groups, with a rough disc covered with medium to dark brown, aseptate, cylindrical hairs with acute apices, measuring 9-37 x 3-4.7 μm. Proper exciple poorly developed, not evident; hymenium colourless to slightly yellowish; paraphysoids branched and anastomosing; hypothecium colourless to very pale brown. Asci 8-spored, broadly clavate to subglobose, semi-fissitunicate, with a large, non-amyloid apical dome, and a distinct ocular chamber, without an amyloid ring-structure in tholus, Arthonia-type. Ascospores 1-septate, hyaline to pale brown when overmature, ellipsoid, 9-15 x 3.5-6 μm. Photobiont absent. Spot tests: K-, C-, KC-, P-. Chemistry: without lichen substances.
Note: known from several European countries and from the Canary Islands, this lichenicolous fungus grows on Cladonia spp. and on the soralia of Flavoparmelia caperata.