So it was identified with Scheuer (1988), the description fits well.

It was abundantly fruiting on Carex rostrata, in bog hollow (N61,059199° E69,460502°).

Apothecia up to 0,5 mm in diam, circular, bursting through the epidermis with irregular flaps aside, flat, light brownish with brown edge; hymenium surface plane to concave, edge some rised under hymenium, irregularly dentate; apothecia densely convering outer surfaces of the leaves.

Excipulum from textura prismatica - porrecta, hyphae with thickened walls, about 4 mk broad, at areas with abundant brown encrustation, at flanks with scarse free ends, edge from cylindrical cells with obtuse ends, to 50 mk long; asci clavate, with clamp, in upper part conical with flattened dome, pore euamyloid, with 2 large spores or occasionally with 8 underdeveloped small, 83 (77-93,5) x 10 (9-10,5); paraphyses cylindrical, segmented, branched, tip some enlarged, curved, embedded in gel, about 1,5 mk broad in base part, to 4 mk at tips, exceeding the asci for about 15 mk; spores fusoid, some curved, 3-septate, in water with many large and small guttules, 32-37 x 6,2-7,3.