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27-04-2026 20:52

Lothar Krieglsteiner Lothar Krieglsteiner

Found on hanging tiwg of Olea europaea in dried-ou

27-04-2026 18:48

Tony Moverley

Collected 23rd April 2026, Norfolk, EnglandSwarms

27-04-2026 17:41

Lothar Krieglsteiner Lothar Krieglsteiner

.. Algarve, same leaf than the last post. The con

27-04-2026 18:05

Lothar Krieglsteiner Lothar Krieglsteiner

... still attached at standing tree. The green con

27-04-2026 17:16

Lothar Krieglsteiner Lothar Krieglsteiner

.. Algarve, moist lying.The conidiomata look like

27-04-2026 12:54

Steve Clements

Bonjour. Ce petit champignon blanc résupiné et

27-04-2026 09:59

Pauline. Penna

Bonjour Can anyone advise me on these pycnidia fo

26-04-2026 21:08

William Slosse William Slosse

Several species of Ramularia occur on Rumex that I

22-04-2026 20:54

Enrique Rubio Enrique Rubio

Hi to everybody.This Pyrenopeziza grew in moist le

25-04-2026 11:34

Louis DENY

Bonjour forumdans la clé de Zotto, L. pudicellum

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Aquatic ascomycete.
Josep Torres, 13-06-2025 09:41
Josep TorresHello.
A cerebriform ascomycete sprouting scattered on the surface of a trunk submerged in a clear stream.
Ascomata measuring up to 4 mm long and 2 to 2.5 mm wide, I was particularly struck by how tough and tenacious these ascomata were.
Very thin conidiophores arranged parallel in a palisade-like pattern produce globose conidia with a large lipid droplet inside that occupies three-quarters of the spore.
An amyloid reaction is observed from the base to the middle of the hymenium with Melzer's Reagent.
No apparent reaction to KOH.
Some of the images show clusters of these supposed conidia, which I wouldn't completely rule out asci.
These presumed conidia measured in water:
(3.6) 3.8 - 4.4 (4.7) × (2.9) 3.2 - 3.8 (4) µm
Q = 1 - 1.3 (1.4) ; N = 40
Me = 4.1 × 3.6 µm ; Qe = 1.1
I admit I don't even know where the air is coming from.
Any opinions would be welcome.
Thank you very much in advance.
Best regards.
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Josep Torres, 17-06-2025 14:09
Josep Torres
Re : Aquatic ascomycete.
Any suggestions.......
Josep Torres, 20-07-2025 14:34
Josep Torres
Re : Aquatic ascomycete.
Hello.
In case anyone is interested, the results of the molecular analysis of the ITS gene have determined that it is an anamorph of Ascocoryne sp. Based on the current data available in Genbank, we cannot be more precise.
I'm adding the phylogenetic tree.
Best regards.
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Francois Guay, 22-07-2025 18:39
Francois Guay
Re : Aquatic ascomycete.
Very interesting, thank you for the follow-up!
Hans-Otto Baral, 26-07-2025 09:29
Hans-Otto Baral
Re : Aquatic ascomycete.
Hi Josep
by accident I looked again in your thread. What a shame that I did not realize this being an Ascocoryne! Now the things are clear thanks to your DNA analysis.
I annotated your tree below but could not name all clades because GenBank is presently out of order.
As your sample is identical with OP023244, I conclude that it is also identical with a Polish sample on Salix not in GenBank (BRA CR32406), which had both conidiomata and apothecia, the latter regrettably overmature. It is so far the only case with apothecia within this "laurisilvae-clade".
A. laurisilvae is only known from its anamorph. It looks very much like yours, despite the genetic distance (see below).
Do you have any idea about the substrate? It looks like a deciduous tree. Do you have the wood to check its anatomy?
I would be pleased to receive the collection data, also the sequence and its ab1 file. And it would be great if we could use your photos in our work. Do you have a scale for your pics?

Very strange is the amyloid reaction, we did not see that in any anamorph of Ascocoryne!

Zotto
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Josep Torres, 26-07-2025 17:18
Josep Torres
Re : Aquatic ascomycete.
Hello Zotto.
Thanks for your prompt response.
You already have everything in your email.
Best regards.