Ascomata: scattered to crowded, developed in outermost bark layers, soon erumpent and sessile, ±round, not distinctly branched, 0.12-0.5 mm wide, in section 100-150 µm thick disc: below the pruina fox-brown to almost hyaline, flat to convex, often densely covered by reddish or white pruina (if with white pruinose, then reddish pruina restricted to the periphery); below the ascomatal flanks often with dark violaceous, non-crystallized pigment; peripheric hyphal structures: composed of well differenciated, branched and anastomosing hyphae, with cells: 5-7 x 2-4 µm, with chestnut brown tinged outer cell walls; often incrusted by orange red grains epihymenium: ±interspersed with orange red grains and/or hyaline rhombic crystals, 10-20 µm thick; hyphae anastomosing and especially in outer parts branched and interlocking, outer cell walls hyaline (occasionally, when densely pruinose) to brown (often or when pruina reduced); cells 4-6 x 1.5-2 µm hymenium: hyaline to pale yellow, 60-100 µm tall, with closely spaced asci; paraphysoids: well developed and distinct in young ascomata, occasionally collapsed in mature ascomata, branched and anastomosing (especially above the asci), hyphae slightly sinuouse, irregularly thick; cells: 3-8 x 0.5-1 µm; subhymenium: hyaline to yellowish or pale reddish brown, 25-50 µm thick; cells irregularly ±round, 2-5 µm in diam., often without plasmatic content and ±collapsed; pigments amorphous, in and between the cell walls