in the Alps I repeatedly found Brunnipila-specimens for study, so B. palearum, B. brunneola, B. latebricola (on Rhododendron and Vaccinium uliginjosum), B. clandestina (not studied), B. calyculiformis s.str. (on Corylus and Alnus alnobetula) and

a form of B. calyculiformis with smaller spores and ionomidotic apothecia (on Alnus alnobetula, 2 collections)
It could be perhaps the following in Zottos key:
4. Sp. 6-8/2 µm (?mature), H. rather violet in KOH ........ B. ?calyculiformis

But I had no success with pulling KOH through the slide, I had no reaction of the hairs. But as I put an apothecium directly in a drop of KOH it reacted distinctly ionomidotic.

If somebody is interested I can give more pictures and data.

Best regards, Lothar