29-07-2013 21:48
Maren Kamke
Hello everybody,a Pyrenopeziza on Malva with lagen
12-07-2013 09:21
Joop van der Lee
Perithecia 0.48-0.58x0.41-0.46 mm, neck covered wi
25-07-2013 18:49
Enrique Rubio
Dear friendsUnder a melanized thin, blackish, clyp
29-07-2013 11:34
Elisabeth StöckliBonjour,Trouvé au bord d'un ruisseau sur du bois
26-07-2013 23:49
Esquivel-Rios EduardoHola Todos.Encontre este ascomiceto en la vaina fo
28-07-2013 17:26
Salvador TelloHola a todos.Hace unos días encontré este hongo
28-07-2013 16:05
Zuzana Sochorová (Egertová)
Dear friends,I need an advice again.This Geopora g
27-07-2013 22:58
Esquivel-Rios EduardoHola Todos.Encontre esta Xylaria en un tronco muer
on a trouvé cet Orbilia sur le bois de bouleau. Les petits et grands ascocarpes, tous les deux, avaient les mêmes caractéristiques microscopiques.
Hi,
We found this Orbilia growing with Mollisia-type ascos on a birch log. Both the glassy-looking small ascocarps and the larger opaque ones had the same microscopy. The ascocarps were small (up to 0.65 mm) and large (up to 2.2 mm).
Paraphyses had swollen heads up to 3.5 um wide.
Asci were 35-45 x 3-4.
In my books I was unable to find a bright yellow Orbilia with spores of these dimensions ie 7-8.5 x 2-2.5.
Steve
Hello Steve,
I think you give pictures of two different discomycetes. The spores you measured are not from an Orbilia (maybe a Hymenoscyphus or Bisporella, as the macrofotos look like), but the next picture with the asci is. In this asci I see minute roundish spores, and I think this is what was earlier determined as Orbilia coccinella (s.l.). Zotto surely knows more, but this for the moment.
Regards from Lothar
I even think it is O. xanthostigma with reniform warted spores
Zotto
Zotto was right - the small one is Orbilia xanthostigma - and so is the large yellow one. Over 10 days they have both developed mature knobbly reniform spores. It's a very big Orbilia at 2.2 mm!
The spores which confused me were from the nearby Mollisia type asco.
That was a real mystery,
Thanks,
Steve
