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16-01-2026 00:45

Ethan Crenson

Hi all, On decorticated hardwood from a New York

10-01-2026 20:00

Tom Schrier

Hi all,We found picnidia on Protoparmeliopsis mur

13-01-2026 07:28

Danny Newman Danny Newman

Chlorociboria glauca on indet. decorticate logThe

08-12-2025 17:37

Lothar Krieglsteiner Lothar Krieglsteiner

20.6.25, on branch of Abies infected and thickened

15-01-2026 15:55

Lothar Krieglsteiner Lothar Krieglsteiner

this one is especially interesting for me because

15-01-2026 10:35

Johan Boonefaes Johan Boonefaes

Last week I found this fungus, possibly a hyphomyc

13-01-2026 08:43

Danny Newman Danny Newman

Tricladium varicosporioides on indet. decorticate

07-01-2026 22:22

Danny Newman Danny Newman

Tatraea sp. on indet. hardwood The Swag, Great Sm

13-01-2026 09:10

Danny Newman Danny Newman

Dasyscyphella chrysotexta on indet. decorticate ha

13-01-2026 10:13

Danny Newman Danny Newman

Cordieritidaceae sp. on indet. wood w/ Hypoxylon s

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Black ascomycete.
Josep Torres, 30-05-2025 14:40
Josep TorresHello.
An ascomycete from last May 10th, sprouting on the surface of a barked trunk of Pinus sylvestris on the ground.
Apothecia sprouting in a scattered manner, like grains, between 0.4 and 0.7 mm in diameter.
Hyphae of the exciple with ochre-brown intracellular pigment.
Apparently octosporic asci, which appear bitunicate. I have not been able to clearly observe any uncinules at their bases, and they are practically unreactive to KOH or Melzer's reagent, with measurements of (101.4) 114.2 - 126.1 (129.7) × (16.2) 16.24 - 19.5 (19.9) µm.
The paraphyses are slightly branched, filiform, with few septa and a width of 1.3 to 1.8 µm.
Some asci appear to have what could be considered ascoconidia inside, and the few more or less developed spores I have observed have a moriform appearance, with a slightly pointed end, 3 or 4 transverse septa, and some scattered longitudinal septa. The measurements within the ascus are (14.1) 14.2 - 17.1 (17.9) × (5.9) 6.6 - 6.7 (6.8) µm.

With this appearance and for Pinus sylvestris, the closest I know would be Placynthiella uliginosa, but microscopy does not match at all.
Any feedback from you would be welcome.
Thank you very much in advance.
Best regards.

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Hans-Otto Baral, 30-05-2025 15:42
Hans-Otto Baral
Re : Black ascomycete.
Vexillomyces (earlier Claussenomyces) atrovirens, at least in a wider sense. The muriform ascospores form minute conidia which are ejected in 8 balls.
Josep Torres, 31-05-2025 07:42
Josep Torres
Re : Black ascomycete.
Thanks, Zotto.
I'm lost in my head. I don't understand why I didn't recognize it. It must be my age. I studied Vexillomyces atrovirens a little over a year ago, and back then, you identified it for me. Here's the link to the topic I presented at the time.
https://www.fungipedia.org/setas-informacion-y-consultas/19-microscopia/74335-vexillomyces-atrovirens-pers-baral-quijada-g-marson-microscopia.html#109930
Best regards.