Well, I always thought that my collections were Octospora meslinii because of what appears in the key of Caillet & Moyne in "Clé du determination du genre Octospora et des genres voisins". There they call it Octospora melina var. meslinii, but in my opinion Octospora melina has shorter spores with a very different shape so I prefer to call it Octospora meslinii. The data figured in Caillet & Moyne´s key fit good with my collection though no there is no info about spore guttulation.

I will try to answer your question, Kazama, about oil drops in spores. I think it is an important character that sometimes can help to define a species. But it is also possible that in some species it is somewhat variable and then not so important. It is as the host, some species are linked to a specific host, but other species have a wider range of hosts. In the species that I found here in my area, which I call Octospora meslinii (always on Tortula subulata), I have three different sites where I found it. In site 1, spores have one big oil drop or one big plus a little one (never so big as the main one). And in site 2 and 3 (about 80km far away from site 1) mostly all spores have only one oil drop, rarely two. The three collections share the moss, colour (poorly orange), abundant anchoring hyphae, ornament pattern and spore measures (site 3 has a slightly different morphology (maybe because of matureless). So as you see I have a variation in my finds, but never seen spores with two nearly equal oils drops as seen in your spores. If I compare it to your find, spore guttulation pattern is very different, also the host, and mine reach a higher width up to 10-12 µm, so who knows if it is the same species. Maybe only molecular studies can find a difference? I don´t know.

By the way I´m really interested in knowing Benkert´s opinion about your collection.

But I never seen Le Gal´s description or that of Svreck & Kubicka, so maybe I am wrong and mine isn´t Octospora meslinii?

Somebody has the original description of Madame Le Gal as Humaria meslinii in "Un Humaria nouveau et un Lamprospora nord-américain récoltés en France" in volume 4 of "Revue de Mycologie", pag. 133-139, specially pag. 133.

And this article of Svrcek & Kubicka?: "Deuxième contribution à la connaissance des Discomycètes operculés de la region de l´étang "Dvoriste" en Sud-Bohême" in volume 17 of "Ceská Mykologie", pag. 61-70, and specially pag. 67 where they transferHumaria meslinii Le Gal to Octospora meslinii (Le Gal) Svrcek & Kubicka.

Thanks in advance,
Raúl