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27-03-2026 15:23

Trichopezizella barbata?
Gernot Friebes

Hi,this Trichopezizella deviates from typical T. b

27-03-2026 15:08

Coelomycete on Cirsium
Gernot Friebes

Hi,I'm looking for help with this coelomycete on C

26-03-2026 15:31

Hymenoscyphus ombrophiliformis?
Ã…ke Widgren Ã…ke Widgren

Hello,I found this one in October last year, on r

27-03-2026 10:47

Stictis cf. friabilis and literature request
Ã…ge Oterhals

I have tentatively identified this Stictis to S. f

25-03-2026 10:35

Encoelia impudicella?
Hulda Caroline Holte

Hello,I collected this species growing on a dead b

24-03-2026 21:37

Helminthosphaeria
Elisabeth Stöckli

Bonsoir,Sur bois (tronc) très pourri de conifère

26-03-2026 12:50

Pseudombrophila
David Chapados David Chapados

Hi,I'm having a hard time figuring which Pseudombr

26-03-2026 11:17

asco in Ulmus
Vasileios Kaounas Vasileios Kaounas

Found 11-03-26, in leaf of Ulmus sp. Diameter 2-4

25-03-2026 22:23

Orbilia with resin deposits
Marc Detollenaere Marc Detollenaere

Dear Forum,On a debarked stem of Tilia, we found s

24-03-2026 15:44

Leptodontidium cf. trabinellum
Ã…ge Oterhals

I hope someone can confirm the name of this collec

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yellow small disco
Masanori Kutsuna, 01-10-2013 10:28
Hello everyone.I found small disco on dead stems.

Disc yellowish, up to 2 mm., stalk whitish, smooth and slender.
Asci 142-160 x 12.8-14.4 microns, IKI+.
Ascospores 40-48.7 x 4.5-5.8 microns.
Paraphyses filled with refractive contents.
Ectal excipulum, parallel, thick-wall, gelatinous hyphae.


Is this a Crocireas?
I couldn't identify by Carpenter's monograph.


Best wishes,
Kutsuna

  • message #25315
  • message #25315
Hans-Otto Baral, 01-10-2013 12:52
Hans-Otto Baral
Re : yellow small disco
Hi Kutsuna

This is certainly a Hymenoscyphus in which the excipular cells are also somewhat gelatinized. Such strongly heteropolar spores are unknown in Crocicreas or Cyathicula.

This find is interesting, it reminds me of the N-American Hymenoscyphus dearnessii, a variant of which is known from Europe, here exclusively on Fallopia (Reynoutria). But the spores are not as big as you say, also they should have bristles at the ends.


Have you more microphotos? Ascus croziers?  In which part of thw wordl did you collect, and what could the substrate be?

Zotto
Masanori Kutsuna, 02-10-2013 01:40
Re : yellow small disco
Dear Zotto

Thank you for your reply.

This disco collected in bush near beech forest, Tottori, Japan, 22.Sept.2012.
Substrate uncertain herbaceous stem, I think Polygonaceae.


I have no more microphotos, but I couldn't observe coriziers and bristles.

Kutsuna   

Hans-Otto Baral, 02-10-2013 10:16
Hans-Otto Baral
Re : yellow small disco
There is a report of a Hymenoscyphus sp. from China, maybe it is this species, though the spores are not as attanuated at the base as in yours.

Yu et al. 2000, Mycotaxon 75: 395-408

This sounds like a new species.

Zotto
Masanori Kutsuna, 02-10-2013 10:23
Re : yellow small disco
Thank you again.

Kutsuna