24-03-2026 21:37
Elisabeth StöckliBonsoir,Sur bois (tronc) très pourri de conifère
25-03-2026 10:35
Hulda Caroline HolteHello,I collected this species growing on a dead b
26-03-2026 15:31
Åke Widgren
Hello,I found this one in October last year, on r
25-03-2026 22:23
Marc Detollenaere
Dear Forum,On a debarked stem of Tilia, we found s
24-03-2026 15:44
Åge OterhalsI hope someone can confirm the name of this collec
25-03-2026 20:53
François BartholomeeusenDear forum members,On 23 March 2026, I found sever
23-03-2026 20:16
Miguel Ángel Ribes
Good eveningI'm unable to identify this Coprotus o
25-03-2026 15:06
Bernard CLESSE
Bonjour à toutes et tous,Pourriez-vous me confirm
hairy discomycete on living Acer
Khomenko Igor,
17-04-2021 15:01
Hi, I'm having trouble identifying this hairy discomycete. I observed it the first time in Dec 2019 on the bark of living Acer and yesterday I found it again on multiple tries, just on bare bark. I thought it may be some long-spored Lachnum sp., but now, because of the shape of paraphyses, I don't think so.
Pictures from 2021- https://inaturalist.org/observations/74176696
Pictures from 2019- https://inaturalist.org/observations/36890974
Asci 8-spored, croziers(+), IKI+b, 118-130x10-13um.
Ascospores very long cylindrical 55-64(90)x2.8-3.7um (observed only in asci);
Hairs hyaline, cylindrical, smooth.
Paraphyses are cylindrical, sometimes forked.
Thanks,
Igor
Stip Helleman,
17-04-2021 20:49
Re : hairy discomycete on living Acer
Hallo Igor,
I don't know the species but I would put it In Arachnopeziza based on hymenial characters and hairs, perhaps some inconspicious basal subiculum is present?
cheers,
Stip
Kosonen Timo,
18-04-2021 15:33
Re : hairy discomycete on living Acer
Hello,
I agree with Stip - Arachnopeziza should not be excluded at least. The egg yellow colour & with very little subiculum is an unfamiliar combination to me. You could try the Korf (1953) key, but not sure at all what you'll end up with.
The coiled hairs are fascinating as well. Dont see that so often either.
I'd be happy to take a closer look if you feel like sending a sample / duplicate to Europe.
bw
Timo
Hans-Otto Baral,
18-04-2021 16:17
Re : hairy discomycete on living Acer
First impression is a Capitotricha - but seems excluded by smooth hairs and apparently no crystals, also non-lanceolate paraphyses.
Lachnellula pseudofarinacea has such spores and apparently smooth hairs, but is on conifers and has amyloid asci. Nevertheless, Lachnellula would be my choice, in the meantime it comprises also species on angiosperms, though this seems an exception.
Khomenko Igor,
18-04-2021 17:09
Re : hairy discomycete on living Acer
Thank you for everyone's contribution. I do see the resemblance with Arachnopeziza in paraphyses and asci. I wouldn't even consider Lachnellula because of the host and paraphyses, but I'm an amateur.
I have a specimen and I can get more if I need it. Kosonen, if you still want it I can mail it to you.
I have a specimen and I can get more if I need it. Kosonen, if you still want it I can mail it to you.
Thanks,
Igor
Hans-Otto Baral,
18-04-2021 18:11
Re : hairy discomycete on living Acer
I think the paraphyses are typical of some Lachnellula and smooth bhairs occur in one (ellisiana). And we have a Lachnellula on angiosperm, genetically proved. But it is only a suggestion.
Hans-Otto Baral,
19-04-2021 12:11
Re : hairy discomycete on living Acer
Hi again
Arian Carter gave me today the great tip that it must be Parachnopeziza miniopsis. He wasn't able to answer on Ascofrance himself, and he has personal collections too.
This species is actually described with an orange disc (Hosoya 2004, paper attached) and curled hairs. Yesterday I did not look at the second collection so I did not see such hairs. I hope the two samples belong to the same species, although this seems reasonable.
Since there is no sequence of this species in GenBank, it would be great to obtain one from the new samples.
Zotto
Hosoya-2004-Claussenomyces-atrovirens-Parachnopeziza-miniopsis-Mollisia-rosae-0001.pdf
Kosonen Timo,
19-04-2021 12:15
Re : hairy discomycete on living Acer
What a lovely match! Finally some light to Parachnopeziza? I'll prepare the lab! :-)
T
T
Khomenko Igor,
19-04-2021 18:19
Re : hairy discomycete on living Acer
Thank you Zotto and Arian for identifying the fungi and for the paper. It fits perfectly.
Kosonen, I can mail it, the specimen is small and already partially dried and I'm sure it is pretty xerotolerant. It is much easier for me to send in a dehydrated state. Will it work for you?
Kosonen, I can mail it, the specimen is small and already partially dried and I'm sure it is pretty xerotolerant. It is much easier for me to send in a dehydrated state. Will it work for you?
Kosonen Timo,
19-04-2021 19:32
Re : hairy discomycete on living Acer
Dry is ok. 20-30 apothecia is a good number so that there is enough to make a good voucher specimen and some for DNA extraction. Or if there's less, I'll just try to manage. It seems it is possible to recollect so no worries.
Timo
Stip Helleman,
19-04-2021 20:05
Re : hairy discomycete on living Acer
Great! that is a nice happy ending!
Stip
Khomenko Igor,
20-04-2021 23:49
Re : hairy discomycete on living Acer
I collected more material today, so now I have enough. I'm going to mail it in the next few days.
Thanks for the help,
Igor