Hypospilina pustula

On a decaying leaf of Quercus sp. on the ground.

Perithecia under 0.5 mm, blackish with a short neck.

Asci cylindric-clavate to slightly fusiform, up to 75 µm long and 10-15 µm wide, 8-spored, with biseriate to irregular spore arrangement, with a characteristic hexagonal congophilic apical apparatus, inamyloid in Melzer's reagent, and with a strong tendency to detach inside the perithecium.

Ascospores cylindrical to slightly fusiform, with rounded ends, hyaline, moderately thick-walled, mostly with a central septum, with only a very slight constriction at the septum, containing 4 oil or lipid droplets inside (two on each side of the septum).

Herbarium material available: JTP1950/23.