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08-07-2024 23:34

Scutellinia umbrarum?
Villalonga Paco

Small Scutellinia growing in garden soil (calcareo

19-07-2024 11:08

Scutellinia nigrohirtula complex 090724
Miguel Ãngel Ribes Miguel Ángel Ribes

Good morningThis Scutellinia from July 9 grew at 1

19-07-2024 10:24

Scutellinia
Kozak Robert

Date: 2024.07.16Loess gorges, on soil with a lot o

04-12-2020 18:23

Marcelleina?
Mirek Gryc

Hello allA friend sent me two collections of small

17-07-2024 11:33

literature request
Angel Pintos Angel Pintos

Hello, anybody body has:Pande A. and Rao, V.G. (1

16-07-2024 18:32

Bryophilous disco on Liochlaena
Andgelo Mombert Andgelo Mombert

Bonsoir, Un discomycète sur Liochlaena lanceolat

17-07-2024 22:37

Another search
Peter Welt Peter Welt

Who can help? Arx, J.A. von. 1973. Ostiolate and

17-07-2024 16:29

Unknown on snail
Andgelo Mombert Andgelo Mombert

Hello,A colleague found an unknown fungus on the s

17-07-2024 10:53

Le Gal M (1959)
Hans-Otto Baral Hans-Otto Baral

I have a question about the scaling of illustratio

17-07-2024 08:35

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Peter Welt Peter Welt

Who can help? Malloch, D.; Hubart, J.-M. 1987. An

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White discomycete on Alnus wood
Stefan Jakobsson, 21-01-2023 00:10
On a dead branch attached to a standing Alnus (?)glutinosa there were some 0.3-0.5 mm wide white apos on decorticared wood. The margin and flanks are covered with smooth more or less uncinate hairs. The spores are 5.7-8.5 × 2.1-2.7 µm and the asci 41-50 × 5.8-7.0 µm. Asci seem to have croziers and the iodine reaction is negtive also after KOH pretreatment. The paraphyses have a long VB in the apical cell.

I tried to match this with e.g. Calycina hyalinula but the hairs don't fit in. The temperature in southern Finland had been mostly above freezing point for a week when this was collected yesterday. Are there better suggestions?

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Lothar Krieglsteiner, 21-01-2023 09:05
Lothar Krieglsteiner
Re : White discomycete on Alnus wood
perhaps have a look in the genus Hmatocanthoscypha?
Best regards, Lothar
Stefan Jakobsson, 21-01-2023 10:39
Re : White discomycete on Alnus wood
The hairs, of course, bring Hamatocanthoscypha to mind. But VBs in Hamatocanthoscypha? I found nothing suitable on hardwood.
Lothar Krieglsteiner, 21-01-2023 10:54
Lothar Krieglsteiner
Re : White discomycete on Alnus wood
you are right, I overlooked the vacuolar bodies. Then Calycellina perhaps ?
Hans-Otto Baral, 21-01-2023 17:50
Hans-Otto Baral
Re : White discomycete on Alnus wood
I was also thinking about the VBs but I believe Hamatocanthoscypha is a good choice. What about H. straminella? Look in my folder, it is IKI-, but I thought it should be yellow. For sulphureocintina this is so and also straminella was described as "straminea vel subaurea".
Stefan Jakobsson, 21-01-2023 18:29
Re : White discomycete on Alnus wood
At least last time I collected H. straminella on Alnus three years ago it was very clearly yellow. Then it was growing under a piece of wood against the ground in darkness, so the lack of light does not explain the difference.
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Hans-Otto Baral, 21-01-2023 20:45
Hans-Otto Baral
Re : White discomycete on Alnus wood
Ah you know it, and it was inamyloid, yes? The hairs contain here distinctly rfefractive VBs, not yellow, but I suppose the yellow VBs in the paraphyses were also refractive.

Surely this is something very similar.
Stefan Jakobsson, 21-01-2023 21:44
Re : White discomycete on Alnus wood
It was inamyloid but probably I did not test with pretreatment. Unfortunately I did not save the photos, but the notes say that hairs and paraphyses were more clearly yellow under the microscope than what the photos show.
Hans-Otto Baral, 21-01-2023 23:00
Hans-Otto Baral
Re : White discomycete on Alnus wood
If you use Lugol you must not pretreat with KOH.
Stefan Jakobsson, 22-01-2023 00:27
Re : White discomycete on Alnus wood
Always lugol!