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12-11-2025 09:25

Viktorie Halasu Viktorie Halasu

Hello, I need help with a pale terrestric Pseudom

11-11-2025 20:16

Bohan Jia

Hi, lastly I have found these tiny yellow decayin

09-11-2025 13:20

Josep Torres Josep Torres

Hello.A tiny ascomycete, appearing as erupting gra

08-11-2025 12:10

Elisabeth Stöckli

Bonjour, Trouvé sur tiges mortes de Rubus (ronce

08-11-2025 00:29

Francois Guay Francois Guay

I found this species in Quebec, Canada, on herbace

04-11-2025 14:53

Josep Torres Josep Torres

Hello.Very small, globose, mucronate perithecia, b

08-11-2025 09:15

Michel Hairaud Michel Hairaud

Bonjour, Pouvez vous m'aider à identifier ce Mol

06-11-2025 16:50

Rot Bojan

Hello! Yesterday I found a fungus on or near a nee

05-11-2025 11:33

Pierre Repellin

Bonjpur,J'ai trouvé, sur une hampe florale d'Alli

04-11-2025 09:07

Josep Torres Josep Torres

Hello.A suspected Hymenoscyphus sprouting on a thi

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Pyrenos on Quercus leaf
Juuso Äikäs, 20-06-2022 07:56
I found some tiny black pyrenos growing on a fallen, decaying Quercus leaf. 

The 2-celled spores measure 8.3 - 9 × 3.5 - 4.1 µm. IKI negative.

Does anyone know what this is? Probably something quite common. Venturiaceae?
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Spooren Marco, 20-06-2022 11:35
Spooren Marco
Re : Pyrenos on Quercus leaf
Hello,

What do you think about "Mycosphserella punctiformis "?If there was no name change there ?

Best,

Marco
Juuso Äikäs, 20-06-2022 13:21
Re : Pyrenos on Quercus leaf
Thanks for the answer -- that does seem like a good suggestion.

The spores are a bit wide with this one, though. But if measured from the septum, the width is 2.7 - 3.2 µm, which might fit better. I'm not sure which measurement style is preferred in this case (center vs. max width).
Spooren Marco, 20-06-2022 15:49
Spooren Marco
Re : Pyrenos on Quercus leaf
Dear,

According to Corlett, annotated list names in Mycosphaerell, your measures are reasonable.There is a study in Mycosphaerella by Andre Aptroot, but I not use that one.

Best,

Marco