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28-02-2026 11:54

Alain GARDIENNET Alain GARDIENNET

Hi forum,Is anyone aware if the 1936 edition of Si

28-02-2026 14:43

Alain GARDIENNET Alain GARDIENNET

A new refrence desired :Svanidze, T.V. (1984) Novy

27-02-2026 17:51

Michel Hairaud Michel Hairaud

Bonjour, Quelqu'un peut il me donner un conseil p

28-02-2026 15:52

Spooren Marco Spooren Marco

Who has an idea ? I have no coupes made for conid

28-02-2026 11:05

Yanick BOULANGER

Bonjour à tousLe 24/02/2026 à Montmacq, devant m

29-11-2024 21:47

Yanick BOULANGER

BonjourJ'avais un deuxième échantillon moins mat

27-02-2026 16:17

Mathias Hass Mathias Hass

Hi, Found this on Betula, rather fresh fallen twi

27-02-2026 12:56

Åge Oterhals

Found on fallen cones of Pinus sylvestris in midle

27-02-2026 11:21

Yannick Mourgues Yannick Mourgues

Hi to all. Here is a specie that can may be relat

26-02-2026 22:06

Malcolm  Greaves Malcolm Greaves

Can someone explain the features that split Geoscy

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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.