Mycoacia livida

On decaying wood of Fagus or Picea, with resupinate basidiomes, pale brown, 2–4 mm thick, with a verrucose to odontioid surface bearing short spine-like protuberances, and a greyish-white growing margin.

Monomitic hyphal system, composed exclusively of generative hyphae with thin to moderately thickened walls, 2–3 µm wide, septate and clamped.

Cystidia of leptocystidium type, measuring 40–50 µm long by only 3–3.5 µm wide.

Basidia clavate, 25–30 µm long by 3–4 µm wide, with basal clamps, 4-spored.

Spores ellipsoidal to slightly allantoid, smooth, hyaline, thin-walled, measuring 4–5 µm long by 2–2.5 µm wide, containing oil droplets of varying size inside, inamyloid in Melzer's reagent.