Hi,
I have collected this ascomycete in a constantly wet and rather cold locality in the Czech Republic, on a twig of a deciduous tree, still with some bark.
Using the key to Mollisia by Andreas Gminder, I´m coming to point 18 in the subkey "wood, bark". Then, the best possibility is M. albogrisea, although the apothecia in my collection cannot be described as white.

Key characters: Ascospores (9.1) 9.7 - 11.3 (12.1) × (2.3) 2.5 - 2.7 (2.9) µm, Q = 3.4-4.6, Me = 10.3 × 2.6 µm; Qe = 4, OCL = 0-1, 1-celled.
Asci (62.1) 67.2-70.7 (75.1) × (6.9)7-7.6 µm, IKI bb, H+.
Subhymenium built of hyaline hyphae.
Very distinct yellow reaction in 5% KOH.

Do you agree with my identification?

I have read a discussion here at ascofrance, and if I understand it well, Mollisia albogrisea was a nom. prov., but the species was later described as Phaeomollisia piceae and then combined to Phialocephala piceae.
Zuzana