Mycoacia nothofagi

On deciduous wood, preferably beech (Fagus), with a completely resupinate fruiting body, cream-coloured with a whitish growing margin, with spines (aculei) 2–8 mm long by 0.2–0.3 mm wide.

Monomitic hyphal system, with generative hyphae only, moderately thick-walled, hyaline, 4–6 µm wide, septate and with clamp connections at the septa.

Cystidia fusiform lamprocystidia, measuring 30–70 µm long by 5–7 µm wide, very thick-walled, with the upper part densely encrusted with hyaline crystals that dissolve in KOH.

Basidia clavate, 19–28 µm long by 4–6.5 µm wide, with basal clamps, 4-spored.

Spores subcylindrical to ellipsoidal, smooth, hyaline, thin-walled, measuring 5–7 µm long by 2.5–3.4 µm wide, containing small oil droplets inside, inamyloid in Melzer's reagent.

Herbarium material available: JTP2638/25.