Description: Thallus crustose, poorly evident, completely immersed in the thalli of Miriquidica nigroleprosa. Apothecia zeorine, sparse, 0.2-0.5 mm across, with a rust-red to orange-red, flat to convex, rough disc, and a slighlty raised, sometimes greyish-orange proper margin. Proper exciple relatively thick, with algae in lower part, I+ blue: epithecium brownish orange, K+ red, C+ purple in section; hymenium colourless, 50-70 µm high; paraphyses simple or sparingly branched, the apical cells only slightly swollen; hypothecium colourless. Asci (6-)8-spored, clavate, Teloschistes-type. Ascospores 1-septate, polarilocular, hyaline, broadly ellipsoid, 10-12 x 5-6 µm, the septum 2.5-4 µm thick, or subglobose, c. 10 µm wide, the septum 2.5-3.5 µm thick. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-; apothecia K+ red, C+ purple in section. Chemistry: apothecia with chlorinated anthraquinones.
Note: exclusively parasite on thalli of the silicicolous Miriquidica nigroleprosa, usually from the high montane to the lower alpine belt; widespread in the European parts of the Holarctic, including the Alps, but rare; not reported from Italy, to be looked for in the Alps.