30-03-2026 12:03
William Slosse
Hello all,On 27/03/26, in Kraaiveld in Wingene (Be
30-03-2026 09:53
Yanick BOULANGERBonjourVoici des petites fructifications poilues s
25-03-2026 10:35
Hulda Caroline HolteHello,I collected this species growing on a dead b
27-03-2026 10:47
Ã…ge OterhalsI have tentatively identified this Stictis to S. f
28-03-2026 07:55
Marc Detollenaere
Hello everybody,Yesterday I found a number of whit
26-03-2026 15:31
Ã…ke Widgren
Hello,I found this one in October last year, on r
27-03-2026 15:23
Gernot FriebesHi,this Trichopezizella deviates from typical T. b
27-03-2026 15:08
Gernot FriebesHi,I'm looking for help with this coelomycete on C
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
