Hello,

in the last few days I have found some Melanomma (I think they are species of Melanomma), but there is one problem : The difference in spore sizes and perithecia features let me think about different species, perhaps different from the common M. pulvis-pyrius. I checked literature but it did not help anyway, i just found some photos of a "M. seminudum" on Zotto's DVD but there are no information about spore size or something.
Well here are the descriptions of the perhaps two different species, just to show you and perhaps you can tell me something about it ;)

Melanomma No 1 found on decorticated Crataegus-twigs, perithecia not embedded.
Spores 18-21x7-8,5 µm. Asci 130-160x10-12 µm. I had not seen any hyphal structures on the outer surface of the perithecia.

Melanomma No 2 found on dead, but hanging, corticated Prunus-spinosa-twig, perithecia nearly completely embedded and sometimes (ever?) with a long neck. On the photo you'll see that the perithecia are sometimes clustered in a stroma or whatever.
Spores 14-19x5-7µm, thick-walled. Asci 50-80x8-10µm, biseriate and bitunicate. Outer surface with long hyphal structures (?).

I just mentioned the differences now, you see the different sizes in spores and asci and especially the perithecia of No 2, which seem to be embedded (unusual for Melanomma-species except M. fuscidulum??).

Well, perhaps someone can give some hints for further literature or how to determine these species ;)

regards,
Kazuya

No 1