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14-02-2025 23:15

Tomaz Vucko Tomaz Vucko

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

14-02-2025 21:55

Alan Smith

hello there, this host is a dead stem of Chamerion

14-02-2025 20:15

Tomaz Vucko Tomaz Vucko

Hello! Another species found in the same place as

14-02-2025 19:15

Tomaz Vucko Tomaz Vucko

Hello!I am trying to identify some of the unidenti

14-02-2025 18:31

Francois Guay Francois Guay

Here’s an interesting unidentified ascomycete I

14-02-2025 16:00

Lothar Krieglsteiner Lothar Krieglsteiner

during a workshop on corticiaceous fungi this was

13-02-2025 07:41

Vasileios Kaounas Vasileios Kaounas

first time I encounter it. I didn't expect to see

14-02-2025 12:57

Gernot Friebes

Hello,we are looking for ideas regarding this pyre

14-02-2025 00:22

Jorian Eijkelboom Jorian Eijkelboom

On 6 february 2025 i stumbled upon a leafspot on P

13-02-2025 22:39

Yanick BOULANGER

BonsoirPetits périthèces noirs d'environ 0.5 mm

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Endoxyla s.l.?
Stefan Blaser, 10-12-2024 16:40
Hello everybody,

Any help on this one would be much appreciated:

Ecology: decorticated hardwood, likely Acer pseudoplatanus

Macro:

Perithecia in groups of variable size immersed in the wood. The surface area around the emerging ostioles is blackened. Ostioles are minutely umbilicate. The wood surrounding the perithecia is not conspicuously discoloured and there is no black line in the wood. Perithecial diameter 0.3-0.6 mm, necks 0.2-0.6 mm.
Micro:
Spores centrally septate, greenish brown, smooth, with a large guttule in each cell and a rather well visible germ Pore on one side, 11-14.5 x 5.0-5.6 (-6.0) µm. Asci 110-140 x 6-7 µm with an inconspicuous but visible apical apparatus that shows no iodine reactions.

Best wishes and many thanks,

Stefan
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Jacques Fournier, 10-12-2024 17:04
Jacques Fournier
Re : Endoxyla s.l.?
Hi Stefan,
I think everything in your excellent images matches with Pseudovalsaria ferruginea.
For differences with Endoxyla you can refer to
Untereiner et al Mycologia, 105(3), 2013, pp. 564–588. DOI: 10.3852/12-326

All the best,
Jacques

Stefan Blaser, 10-12-2024 17:36
Re : Endoxyla s.l.?
Many thanks, Jacques!

I should have known the species, but the nearly lacking stroma confused me too much.

The other collection looked like this...
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Jacques Fournier, 10-12-2024 17:51
Jacques Fournier
Re : Endoxyla s.l.?
the first collection is more typical. The other stroma likely became superficial by disintegration of the surrounding strongly rotten wood. Tricky!