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16-01-2026 00:45

Ethan Crenson

Hi all, On decorticated hardwood from a New York

08-12-2025 17:37

Lothar Krieglsteiner Lothar Krieglsteiner

20.6.25, on branch of Abies infected and thickened

16-01-2026 11:20

Castillo Joseba Castillo Joseba

Me mandan el material seco de Galicia (España) 

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

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

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likely out of topic - anamorph of Botryobasidium?
Lothar Krieglsteiner, 29-11-2019 12:56
Lothar Krieglsteiner

... collected in the National Park of Eifel, Germany, 13.11.19, on very freshly fallen log of Fagus sylvatica, on the bark (iniatial phase), abundantly growing.


The conidia are very variable in size, about (12)14-18(21)/(7,5)9-13(17) µm, the hyphae are about 14-18 µm broad, at the clavate ends up to 23 µm.


I think of an anamorph of Botryobasidium, but I do not clearly get to a species. Does somebody?


Best regards, Lothar

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Eduard Osieck, 29-11-2019 15:53
Re : likely out of topic - anamorph of Botryobasidium?
Could be “out-of-topic” indeed: this reminds me of the algae Trentepohlia which forms extensive orange mats on tree trunks like Pinus sylvestris.
See for instance: http://www.bioref.lastdragon.org/Chlorophyta/Trentepohlia.html
Eduard
Lothar Krieglsteiner, 29-11-2019 15:56
Lothar Krieglsteiner
Re : likely out of topic - anamorph of Botryobasidium?

Hello Eduard,


thank you for your proposal.


But - I do not believe this. I saw Trentepohlia often, on rocks and on wood also. I am sure this is a fungus.


Best regards, Lothar

Thorben Hülsewig, 29-11-2019 16:24
Re : likely out of topic - anamorph of Botryobasidium?
Hi Lothar,

compare with Nematogonum ferrugineum.

Viele Grüße,
Thorben
Lothar Krieglsteiner, 29-11-2019 16:33
Lothar Krieglsteiner
not out of topic - Nematogonum ferrugineum

Hallo Thorben,


fantastisch - das scheint sehr gut zu passen.


Ich habe mich hier informiert:


http://www.ascofrance.com/forum/13380/asco-sur-fagus


Wenn ich es richtig verstanden habe, handelt es sich um einen Parasiten auf Neonectria-Arten. In der Nähe sah ich N. coccinea (oder was ich dafür halte), insofern passt es vorzüglich, natürlich auch bezüglich der makro- und mikroskopischen Merkmale.


Nochmals danke und herzliche Grüße


Lothar