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17-04-2026 19:16

Enrique Rubio Enrique Rubio

Hi to everybodyI would appreciate any assistance r

14-04-2026 05:32

Ethan Crenson

Hi all, A few weeks back a friend pointed out som

17-04-2026 15:14

Bruno Coué Bruno Coué

Bonjour.Récoltes du 16/04/2026, sur feuilles mort

12-04-2026 15:52

Gernot Friebes

Hi,I'm looking for help with this anamorph collect

14-04-2026 21:52

Gernot Friebes

Hi,found on dead leaves of Carex elata. Conidia: 4

16-04-2026 22:09

Buckwheat Pete

Hello, I'd like to ask about this older specimen:

15-04-2026 19:33

Fátima Durán Manzaneque

Hi!! I need help, I found this Ascomycete but I d

14-04-2026 20:31

Gernot Friebes

Hi,can this be Psilachnum lateritioalbum on Phragm

12-04-2026 17:56

Hardware Tony Hardware Tony

Found on dead stems in February earlier this year

12-04-2026 12:22

William Slosse William Slosse

In a dune grassland in Oostduinkerke (Belgium), on

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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