does nobody have any comment?

The spore ornamentation points to B. areolata, but of course this spore size is weird... No idea.

thanks, Nicolas, for your comment.

Is Boudiera purpurea already excluded?

Hello Lieve,
thank you for your proposal. But:
B. purpurea should have an ornament of spines, not a (strong) reticulum. There spores are larger also. B. purpurea is described here:
https://www.zobodat.at/pdf/Pilzflora-Nordwestoberfrankens_12_0051-0059.pdf
Best regards, Lothar

I regard the net-like ornament as an extra layer above the spines. See attachments, in particular part 2, p. 13 or consult the literature Le Gal (see bibliography)

(or online: https://kvmv.be/publicatie/sporen-11-4; https://kvmv.be/publicatie/sporen-11-3. )
Additionally: I have a letter from van Brummelen (1968) confirming a Flemish find of B. purpurea, but no herbarium material is available.

Hello Lieve,

thank you very much for the intersting files - I did not knwo this publication(s).

Anyway, I find my spores are too small even for B. purpurea - considered that it can have a reticulate "envelope". 

I am also a bit confused by the colour of "your" B. areolata. I found this species (with spores large enough) twice in my life -  once in Lower Franconia (my dissertation) and once in the Black Forest, in a "Hochmoor"; both in Germany. Both fimds had a colour similar to my Portuguese find, dark red brown (moist) to almost black (dry). Maybe like this:
https://www.centrodeestudiosmicologicosasturianos.org/?p=8838
Compared with this your areolata looks very deviating in respect to colour.

Best regards, Lothar

Thank you for your reply. Yes, the fruiting bodies were very young and light in color. Unfortunately, I did not take an additional macro photo after the fruiting bodies had had two weeks to mature.

Good luck with your find.

thank you! Then your pictures show unripe B. areolata? And later the dark color had appeared? This is interesting. In my first find (long ago) I had also first unripe apothecia, but hey were already dark brown.