On a mat of dried algae/lichens, loosely attached to a herbeceous stem, I found several very small, dirty gray fruiting bodies (diameter 155 to 220 µm), sitting on the substrate.
Asci: club-shaped, thick-walled, 27 x 6.5 µm; reddish-brown in Meltzer and Baral's solution, blue-black in Lugol's solution;
Spore: needle-shaped, stretched, (21.4) 23.6 - 27.2 (27.5) × (1.4) 1.7 - 2.1 µm, no septa, only in IKI 2 septa;
Paraphyses and base asci difficult to observe;
Conidia: filiform, curved, without septa, Me = 31.5 × 1.4 µm (measured with curvature)
Textura: globulosa incrassato-imbuta
Using the key in the publication listed below, I arrive at Bacidina chloroticula.
However, my knowledge of algae/lichens is insufficient to be certain of the identification. Can anyone help me? Many thanks in advance.

François Bartholomeeusen

Ekman, S. (2023) Four new and two resurrected species of Bacidina from Sweden, with notes and a preliminary key to the known Scandinavian species. Nordic Journal of Botany

Translated with DeepL.com (free version)