Dear forum,
I found this small discomycete on a very rotten small decorticated, deciduous branch on the ground in mixed forest with Betula, Sorbus and Ilex outside Bergen at the Norwegian west coast. I believe it is Dematioscypha olivacea, and hope someone can confirm this based on the enclosed description and photos.
Disc 0.3 mm diam., grey-brown, surrounded by dark hyphomycete. Microscopy based on water mount of fresh material found in September 2025: Hairs hyaline, thin-walled, cylindric, straight, blunt, 3-septate, 63-83 x 2,3-3,0 µm. Minor amount of light-colored exudate may be observed on the upper part of some of the hairs, however, hard to confirm with certainty. Based on the macro-photo, the hairs look glued together into larger units. Asci 37-44 x 4,1-5,4 µm, cylindric, without croziers based on my interpretation. Sp. 6,6-7,7 x 2,1-2,6 µm; Q=2,7-3,3.
None of the Dematioschypha species has been found in Norway so far. The lack of larger amounts of exudate makes it difficult to follow the key in Raitviir's monograph from 2004.

Best regards,
Åge