Ascomata pseudothecia, 0.6–1 mm diam (n=20), globose to subglobose, immersed in the upper bark, slightly to distinctly elevating the bark, often in groups, always surrounded by a black stromatic zone vertically extending through the entire bark, without a dark clypeus. Ostioles central to excentric, 200–300 μm long, 200–280 μm wide, whitish in section. Asci (285–)315–360(–380) × (40–)43–53 (–57) μm (n=31), fusiform to cylindrical, short-stalked, the apex rounded to truncate with a large but inconspicuous apical structure (ring), containing 8 biseriate ascospores. Ascospores (54–)65–76(–89) × (16.5–)18–21(–22.5) μm, l/w=(2.7–)3.3–4.1(–5.0) (n=204), ellipsoidal to cylindrical, dark brown, ± smooth, 3-septate, the septa distinctly thickened especially at the outer wall, end cells narrowly rounded to subacute, surrounded by a gelatinous sheath, the sheath wide especially in young ascospores and divided at the primary septum.
Description derived from Voglmayr & Jaklitsch (2010).