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Mot de passe perdu? S'inscrire

17-09-2025 16:14

Philippe PELLICIER

Apothécies enterrées, fermées au début puis s'

17-09-2025 10:50

Heather Merrylees

Hi there!I am hoping for any advice on the identif

11-09-2025 16:57

Jason Karakehian Jason Karakehian

Our revision of Marthamycetales (Leotiomycetes) is

16-09-2025 12:53

Philippe PELLICIER

Pézizes de 1-4 mm, brun grisâtres, sur les capsu

03-09-2025 12:44

Enrique Rubio Enrique Rubio

Hi to somebody.I would like to know your opinion o

15-09-2025 14:40

Nicolas VAN VOOREN Nicolas VAN VOOREN

Hello.I'm searching for a digital copy of the seco

14-09-2025 22:16

Philippe PELLICIER

Apothécies petites jusquà 3 mm, oranges, avec de

13-09-2025 14:01

Thomas Flammer

dark brown apothecia, splitIKI-Spores biguttulate

10-09-2025 17:18

Blasco Rafael Blasco Rafael

Hola, encontre este estiercol de vaca estos apotec

13-09-2025 14:10

Wim de Groot

We found this hymenoscyphus on rubus fruticulosis.

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Trichopezizella with Helicogonium endoparasite?
Edvin Johannesen, 04-08-2021 23:16
Edvin Johannesen
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.
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Edvin Johannesen, 04-08-2021 23:17
Edvin Johannesen
Re : Trichopezizella with Helicogonium endoparasite?
And ascospores and conidia (last two in phase contrast).

All images in water.
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Hans-Otto Baral, 05-08-2021 11:16
Hans-Otto Baral
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
Edvin Johannesen
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
Hans-Otto Baral
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
Edvin Johannesen
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
Hans-Otto Baral
Re : Trichopezizella with Helicogonium endoparasite?
H+ = with croziers (Haken)
Edvin Johannesen, 05-08-2021 12:31
Edvin Johannesen
Re : Trichopezizella with Helicogonium endoparasite?
Cheers!