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09-11-2025 13:20

Josep Torres Josep Torres

Hello.A tiny ascomycete, appearing as erupting gra

08-11-2025 12:10

Elisabeth Stöckli

Bonjour, Trouvé sur tiges mortes de Rubus (ronce

08-11-2025 00:29

Francois Guay Francois Guay

I found this species in Quebec, Canada, on herbace

04-11-2025 14:53

Josep Torres Josep Torres

Hello.Very small, globose, mucronate perithecia, b

08-11-2025 09:15

Michel Hairaud Michel Hairaud

Bonjour, Pouvez vous m'aider à identifier ce Mol

06-11-2025 16:50

Rot Bojan

Hello! Yesterday I found a fungus on or near a nee

05-11-2025 11:33

Pierre Repellin

Bonjpur,J'ai trouvé, sur une hampe florale d'Alli

04-11-2025 09:07

Josep Torres Josep Torres

Hello.A suspected Hymenoscyphus sprouting on a thi

04-11-2025 12:43

Edvin Johannesen Edvin Johannesen

Hi! One more found on old Populus tremula log in O

03-11-2025 21:34

Edvin Johannesen Edvin Johannesen

These tiny (0.4-0.5 mm diam.), whitish, short-stip

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Enigmatic pyrenomycete
Enrique Rubio, 01-01-2025 13:45
Enrique RubioTHESE BLACKISH ASCOMATA WERE SEMI-IMMERSED IN A HARDWOOD BRANCH (PROBABLY QUERCUS) PARTIALLY BURIED IN THE GROUND, NEXT TO STROMATA OF XYLARIA HYPOXYLON. THE ASCOMATA, UP TO 700 MICRONS LONG, HAVE A BLACKISH PERITHECIAL VENTER IMMERSED UNDER THE WOOD AND A LONG NECK WITH A FIMBRIATED OSTIOLE THAT AGGLUTINATES SPORE BALLS OF DISCHARGED ASCOSPORES.
THE ASCI ARE CYLINDRICAL, WITH A DOUBTFUL OR INCONSPICUOUS APICAL APPARATUS MLZ. NEGATIVE AND THEY HAVE EIGHT OBLIQUELY UNISERIATE ASCOSPORES. THE PARAPHYSES ARE ABUNDANT, IN SOME CASES WITH MONILIFORM SEGMENTS AND THEY EXCEED THE LEVEL OF THE ASCI.
THE MATURE ASCOSPORES ARE BLACISH BROWN, THEY HAVE AT LEAST ONE GERM PORE (RED ARROW), SOMETIMES TRANSVERSE SEPTA, A COMPLEX SYMMETRIY AND PERHAPS A SHORT GERM-SLIT ONLY WELL VISIBLE IN MELZER'S REAGENT (BLUE ARROW).
I CANNOT FIND AN APPROPRIATE GENUS FOR THIS FUNGUS, NOT EVEN WITHIN THE MELANOSPORALES, SO I AM ASKING FOR SOME CLUE TO SOLVE THIS ENIGMA.
I WOULD LIKE TO TAKE THIS OPPORTUNITY TO WISH YOU A HAPPY NEW YEAR.
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Alain GARDIENNET, 03-01-2025 08:17
Alain GARDIENNET
Re : Enigmatic pyrenomycete
Hi Enrique, 
Your fungus should not be too far from Bellojisia rhynchostoma.
Happy new year for you, and forum !
Alain
Thorben Hülsewig, 03-01-2025 10:48
Re : Enigmatic pyrenomycete
Hi Enrique,

Perhaps you have found Corylomyces selenospora.

best regards,
Thorben
Enrique Rubio, 03-01-2025 12:45
Enrique Rubio
Re : Enigmatic pyrenomycete
Some colleagues had initially pointed me towards Corylomyces and later towards Bellojisia. I think this fungus could belong to the latter genus, because by the morphology of the ascomata, the asci with an inconspicuous apical apparatus and the presence of abundant paraphyses. But the spores are quite different from those of J. rynchospora. Unfortunately there is too little material to attempt a culture and sequencing, but I am very grateful for your help.