Dear all,
herewith another pyreno collected on decayed deciduous wood:
Perithecia scattered to gregarious, venter immersed, 0.35-0.5 mm diam., 0.3-0.35 mm high, blackish, surrounded by sparse mycelium, with a mostly central, straight to slightly flexuous neck, not sulcate, 150-350 µm long by 100 µm diam.Asci with truncate apex and rounded basal end, 29-37x6 µm, biseriately 8-spored, with inconspicuous IKI- apical annulus. Ascospores ellipsoid, mostly inequilateral, or reniform, 6.5-8x3-4 µm, aseptate, smooth, pale yellowish brown, with two polar guttules 2-2.5 µm diam. and a few small ones.Paraphyses not observed.Perithecial wall leathery, with textura angularis, opaque black. Mycelial hyphae 4-5 µm diam., thick-walled, dark brown.
Your help is welcome.

Cheers,
Bernard