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21-11-2025 11:52

Jean-Luc Ranger

Bonjour à tous, on voit toujours 2 espèces areni

21-11-2025 10:56

Christopher Engelhardt Christopher Engelhardt

Very small (~0,5 mm) white ascos, found yesterday

21-11-2025 10:50

Mirek Gryc

Hello Please help me identify this little asco.It

21-11-2025 10:47

François Freléchoux François Freléchoux

Bonjour,Peut-être Mollisia palustris ?Trouvée su

29-06-2016 18:06

Elisabeth Stöckli

Bonjour,Trouvé sur branches mortes cortiquées de

14-11-2025 16:26

Marian Jagers Marian Jagers

Hello everyone, On dead wood of Cytisus scoparius

17-11-2025 21:46

Philippe PELLICIER

Bonjour,Récolté sur bois pourrissant de feuillu

20-11-2025 14:14

Mick Peerdeman

Found on the leaves of 'Juglans regia' in the Neth

20-11-2025 13:07

Mick Peerdeman

In January i found these black markings on the dea

20-11-2025 12:38

Mick Peerdeman

Dear all,Last week i stumbled upon a leaf of ilex

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Setose coelomycete on leaves of Rosa rugosa
Matthias Reul, 03-05-2025 12:43
Matthias ReulHi together,

Maybe someone has an idea about this one. It's a setose coelomycete that grew on the lower Surface of dead leaves of Rosa rugosa, directly at the coast of Northern Germany, found by Torsten Richter. In the vicinity, Breviappendix rosae could be found, but on differernt leaves. I'm not sure whether there could be a connection between these two.
Some data:
Conidiomata up to 430 µm accross
Setae: 90 - 180 × 6 - 8.3 µm
Conidia:
(7.5) 8.1 - 9.8 (10.3) × (1.8) 1.82 - 2.2 (2.3) µm
Q = (3.6) 4.3 - 5.1 (5.4) ; N = 20
Me = 9.1 × 2.0 µm ; Qe = 4.6
There do not seem to be any appendages on the conidia. Further, I could not observe conidiogenous cells or the conidiogenesis, what surely does not faciliate determination, but I even don't have any idea so far. If neccessary, I could try to get more details. Any hints are welcome.


Thanks in advance,
Matthias 

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Thorben Hülsewig, 03-05-2025 20:53
Re : Setose coelomycete on leaves of Rosa rugosa
Hi Matthias,

very interesting.
You can compare with Dinemasporium asetulum.
But this species is report from africa.

best regards,
Thorben
Thorben Hülsewig, 03-05-2025 21:56
Re : Setose coelomycete on leaves of Rosa rugosa
Now i found a better option.
Compare with Chaetomella oblonga.
This species is described on leaves of Rosa and the micro features fits well.
But conidiogenous cells are present.
Matthias Reul, 04-05-2025 10:57
Matthias Reul
Re : Setose coelomycete on leaves of Rosa rugosa
Hallo Thorben.

vielen Dank, das passt perfekt. 
Ich hab nochmal am Exsikkat nachuntersucht, Konidienträger gibt es natürlich, dazu war das erste Präparat nur nicht gut genug. Jetzt hab ich sie gefunden, auch die passen für deinen Vorschlag.
Anbei noch ein paar Bilder.

Viele Grüße
Matthias
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