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19-02-2025 19:25

Margot en Geert Vullings

On a fallen Fagus branch we found these bumps, som

19-02-2025 18:59

Margot en Geert Vullings

On a dead twig of Carpinus we saw these black spot

18-02-2025 18:11

Blasco Rafael Blasco Rafael

Hola, he recogido esta Orbilia en madera indetermi

14-02-2025 20:15

Tomaz Vucko Tomaz Vucko

Hello! Another species found in the same place as

16-02-2025 22:51

Yanick BOULANGER

BonsoirVoici un Lophodermium sur aiguilles de pin

13-02-2025 17:40

Blasco Rafael Blasco Rafael

Hola, he recogido esta muestra sobre madera de Ret

15-02-2025 12:21

Lennert Gees

Hello!I've found this species on birddung, but I s

15-02-2025 15:16

Jorian Eijkelboom Jorian Eijkelboom

On 6 february 2025 i stumbled upon a leafspot on a

14-02-2025 23:15

Tomaz Vucko Tomaz Vucko

Hy! Last one for today.How would you identify thi

14-02-2025 18:31

Francois Guay Francois Guay

Here’s an interesting unidentified ascomycete I

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On Fagus branch
Margot en Geert Vullings, 19-02-2025 19:25
On a fallen Fagus branch we found these bumps, sometimes black broken through, under which black perithecia are visible, without a black ring around the stroma.
The perithecia have a neck (not clearly visible in the photos) that is about as long as the bulb and lie just under the bark in the horizontal plane, usually with 3-5 together .
The spores are brown with 3 septs and show large guttulles, usually one in each segment.

Measured in water: 30.2 - 35.8 (39.6) × (10.3) 10.32 - 11.5 (11.8) µm; Qe = 3

The ascus tops show no reaction in Melzers and Congo red.

We found Prosthecium ellipsosporum, which could fit some spore size and also does not have a black rim around the stroma, only this one has been described on Carpinus and these spores have appendages.
Maybe there are other options?
Thanks in advance, Margot&Geert
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