primeval undisturbed mixed forest (Fagus sylvatica, Picea abies, sometimes Abies alba, Acer pseudoplatanus), on the wood of Fagus sylvatica.Spores - 4,2 -5 x 2 - 2,6 µm, ellipsoid, broadly ellipsoid; Asci - 8 spored, truncate, sometimes rarely with a hemisphaerical endings.