25-03-2026 10:35
Hulda Caroline HolteHello,I collected this species growing on a dead b
26-03-2026 15:31
Åke Widgren
Hello,I found this one in October last year, on r
25-03-2026 22:23
Marc Detollenaere
Dear Forum,On a debarked stem of Tilia, we found s
24-03-2026 15:44
Åge OterhalsI hope someone can confirm the name of this collec
25-03-2026 20:53
François BartholomeeusenDear forum members,On 23 March 2026, I found sever
23-03-2026 20:16
Miguel Ángel Ribes
Good eveningI'm unable to identify this Coprotus o
25-03-2026 15:06
Bernard CLESSE
Bonjour à toutes et tous,Pourriez-vous me confirm
25-03-2026 13:54
Enrique Rubio
Does anyone know where I could download Paoletti's
Trichopezizella with Helicogonium endoparasite?
Edvin Johannesen,
04-08-2021 23:16
Hi!
I suspect I have a Trichopezizella with a hymenial parasite very similar to what was discussed here:
This one grows on dead Reynoutria japonica stems in Western Norway.
I think the asci (IKI-) have croziers and belong to the parasite (if I'm right in that there is one). The ascospores pinch off conidia at the terminal end. There are loads of conidia, but relatively few primary ascospores. Paraphyses lanceolate. Hairs with yellowish-orange chrystals at the tips. Is it possible to say if this is T. rubroguttata or T. nidulus? Is the parasite (again IF) a Helicogonium?
Opinions greatly appreciated.
Cheers.
Edvin Johannesen,
04-08-2021 23:17
Re : Trichopezizella with Helicogonium endoparasite?
And ascospores and conidia (last two in phase contrast).
All images in water.
Hans-Otto Baral,
05-08-2021 11:16
Re : Trichopezizella with Helicogonium endoparasite?
Yes it is clearly Helicogonium! You can try my key but it will be difficult. I cnanot remember such a host, but not sure.
Edvin Johannesen,
05-08-2021 11:41
Re : Trichopezizella with Helicogonium endoparasite?
Thanks, Zotto. I don't have your key - is it the one in Nova Hedwigia 69: 1-71? When you say you don't remember the host, are you referring to Trichopezizella as host for the Helicogonium or Reynoutria as host for the Trichopezizella? Finally, do you think this is T. rubroguttata or T. nidulus (what are the differences)?
Hans-Otto Baral,
05-08-2021 11:53
Re : Trichopezizella with Helicogonium endoparasite?
I meant the host Trichopezizella.
It is the nova hedwigia paper, yes.
All what is not on Polygonatum is T. rubroguttata, but there exist populations with H+ and H-, maybe two different species.
Edvin Johannesen,
05-08-2021 12:02
Re : Trichopezizella with Helicogonium endoparasite?
Thanks a lot! (Sorry, but what do you mean by H+/H-?)
Hans-Otto Baral,
05-08-2021 12:26
Re : Trichopezizella with Helicogonium endoparasite?
H+ = with croziers (Haken)
Edvin Johannesen,
05-08-2021 12:31
Re : Trichopezizella with Helicogonium endoparasite?
Cheers!