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23-12-2024 14:37

Josep Torres Josep Torres

Hello.Some tiny globose black ascomata found on De

23-12-2024 18:18

Rot Bojan

Hello!I've been working with this small fungus for

23-12-2024 22:59

Lucian Clanet Lucian Clanet

Hello,I'm trying to find information about the Hyp

21-12-2024 12:45

Marc Detollenaere Marc Detollenaere

Dear Forum,On naked wood of Fagus, I found some ha

24-12-2024 09:02

Charles Aron Charles Aron

Hi All, Recently I found this orange Disco growin

23-12-2024 12:10

Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous m'aider à

22-12-2024 21:42

Bometon Javier Bometon Javier

Habitat en el suelo, con presencia de Calluna mult

17-12-2024 12:33

Lothar Krieglsteiner Lothar Krieglsteiner

this fluffy anamorph was repeatedly found on decid

22-12-2024 10:19

Simon Gurtner Simon Gurtner

Hello,can anyone help me identify this small ascom

22-12-2024 10:53

Bernard CLESSE Bernard CLESSE

Pourriez-vous me confirmer ma détermination de ce

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Yellowish apothecias on Sorbus
Thomas Flammer, 07-07-2024 10:07
I am struggeling with some tiny yellowish apothecias I found on bark of Sorbus.
1. how can i differentiate Mollisia from Pyrenopeziza? What is microscopically the difference?
2. I searched the Internet, since I do not have any literature about Mollisia and Pyrenopeziza, except using asco-sonnenberg. Any hint is welcome.
Thanks, I hope this is an appropriate question in this high-profile forum.
Regards
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Hans-Otto Baral, 07-07-2024 10:21
Hans-Otto Baral
Re : Yellowish apothecias on Sorbus
I am not sure about the family of this fungus. Important is to study the excipulum, best in a section, but also squash mount may be helpful.

Is it hyaline or brown? Is it of globose cells or elongate?
Thomas Flammer, 07-07-2024 11:19
Re : Yellowish apothecias on Sorbus
Thanks a lot, I have added a squash image.
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Hans-Otto Baral, 07-07-2024 11:42
Hans-Otto Baral
Re : Yellowish apothecias on Sorbus
Very pale, but cells roundish.

On your first micro I see one paraphsyis. It lacks the refractive content of a Mollisia, so that group can safely be excluded.

How large are the apos, 0.3 mm?

Such "characterless" fungi are difficult to classify.
Ingo Wagner, 07-07-2024 15:32
Ingo Wagner
Re : Yellowish apothecias on Sorbus
Hello Thomas!

You can try to better represent the elements from the marginal area and the paraphyses.

Greetings
Ingo Wagner
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Thomas Flammer, 07-07-2024 20:10
Re : Yellowish apothecias on Sorbus
Tx Ingo, attached the suggested picture.
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Hans-Otto Baral, 07-07-2024 21:43
Hans-Otto Baral
Re : Yellowish apothecias on Sorbus
Woww, this changes all. Now the paraphyses contain long, strongly refractive vacuoles and the excipulum is more brownish.

The spores look lke having a few minute drops near each end.

I fear I do not know. A bit similar is Chlorosplenium chlora but that is up to 1-2 mm large.
Lothar Krieglsteiner, 10-07-2024 09:35
Lothar Krieglsteiner
Re : Yellowish apothecias on Sorbus
"It lacks the refractive content of a Mollisia, so that group can safely be excluded." ... and why not a Mollisia now? Refractive vacuolar bodies and dark globulosa?
Hans-Otto Baral, 11-07-2024 20:26
Hans-Otto Baral
Re : Yellowish apothecias on Sorbus
Hi Lotharm Chlorosplenium mighg be difficult to delimit from Mollisia s.l., so with te VBs it can actually be one, despite the minute apos. A light brown (not dark) excipulum is possible in the genus.