Octosporella erythrostigma  

Mycelium partially external, with hyphae (4–) 5–8 μm diam., hyaline and thick-walled. Appressoria (10–)14–20(–25) × (8.5–)10–17 (–20) μm, elliptical to almost circular in outline, wall apically up to 4 μm thick, with a central pale spot and a typically curved, 1- or 2-celled stalk.
Anamorph: not known.
Teleomorph: ascomata apothecia, very strongly cupulate and appearing perithecial, (200–)240–330 (–400) × (130–)170–250(–300) μm, ovoid (rarely almost cylindrical or spherical), orange-red, densely setose in the upper part. Setae to 70(–90) μm long and basally 5–8(–9) μm wide, uncoloured, straight or slightly curved, thick-walled, the lumina reduced or missing. Peridium 13–22(–25) μm thick with cells (10–)15–25(–30) μm diam., irregularly shaped, thick-walled, with yellowish droplets of varying size, mostly hidden by the setae. Interascal tissue of rarely branched paraphyses 2–3(–4) μm diam., not anastomosed, containing numerous yellowish droplets. Asci (70–)80–100(–115) × 15–20 μm, clavate, short-stalked, thin-walled and not fissitunicate, the apex rounded, without apical structures, not blueing in iodine, mostly 8-spored but with up to four not developing in some asci. Ascospores irregularly biseriate, (23–)27–33(–37) × (6–) 7–9(–10) μm, narrowly ellipsoidal, often slightly asymmetric, hyaline, in most cases with three yellowish oil droplets, the biggest one in the middle of the spore, the spore wall at both ends thickened, with a slightly cyanophilic epispore and a filamentous appendage at one end, 2–8 (–23) × ca 1 μm in size.