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30-06-2025 12:09

Black erumpent on Populus (Ascodichaenaceae?)
Edvin Johannesen Edvin Johannesen

This tiny, rather "rough" erumpent asco was found

30-06-2025 19:05

RECHERCHE ARTICLE
ALAIN BOUVIER

Bonjour à toutes et à tousJe cherche à lire l'a

30-06-2025 14:45

is this a Hymenoscyphus on Nothofagus?
Götz Palfner Götz Palfner

This is a quite common species on Nothofagus wood

30-06-2025 16:56

Septoria on Impatiens glandulifera
Lydia Koelmans

Please can anyone tell me the species name of the

30-06-2025 06:57

Pezizales --Pyronema?
Ethan Crenson

Hi all, Another find by a friend yesterday in Bro

25-06-2025 16:56

Scutellinia cejpii ?
Philippe PELLICIER

Bonjour, pensez-vous que S. ceijpii soit le nom co

29-06-2025 18:11

unknown discomycete from Brooklyn
Ethan Crenson

Hello all, A friend found this disco yesterday in

28-06-2025 17:10

Literature Request
Peter Welt Peter Welt

I'm looking for: RANALLI, M.E., GAMUNDÍ, I.J. 19

28-06-2025 16:00

Salvia leaf parasite
Josep Torres Josep Torres

Hello.A tiny fungus shaped like globose black grai

27-06-2025 14:09

Pyrenomycetous fungi on old stalks of Chamaenerion
Åge Oterhals

I found this pyrenomycetous fungi in mountain area

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Possibly Helotiaceae? White/Off-white discomycete
Ethan Crenson, 29-01-2024 18:16
Hello,

Can anyone help ID this discomycete. White recepticle, with off-white hymenium. 

Spores:
Hyaline, with one or two guttules, small, broadly ellipsoid, but in some cases fusiform, longer spores occasionally allantoid.

2.6-4.4 x 1.3-1.8µm
Me: 3.3 x 1.5µm


Asci:
8 spored, IKI+, biseriate, with croziers
30-33 x 4.7-5.0µm


Ectal excipulum hairs: 2.2-2.6µm wide, encrusted with yellowish refractive lumps.


Medullary excipulum, textura globosa to angularis


Paraphyses 1.8µm wide, cylindrical.

Any suggestions?

Thanks,

Ethan
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Hans-Otto Baral, 29-01-2024 20:26
Hans-Otto Baral
Re : Possibly Helotiaceae? White/Off-white discomycete
This looks much like Hyphodiscus smaragdinus (earlier Hyphodiscus viridipilosus). Known ?only from Europe.
Ethan Crenson, 29-01-2024 20:28
Re : Possibly Helotiaceae? White/Off-white discomycete
Thank you, Zotto!  Another Hyphodiscus!  I seem to find them quite a bit.  I wish I had more material or I would attempt to sequence it.
Hans-Otto Baral, 29-01-2024 21:07
Hans-Otto Baral
Re : Possibly Helotiaceae? White/Off-white discomycete
A European sequence exists but it does not seem to be in GenBank.
Ethan Crenson, 29-01-2024 22:20
Re : Possibly Helotiaceae? White/Off-white discomycete
This appears to be the third species of Hyphodiscus that I have collected in the NYC metropolitan area. Hyphodiscus hymeniophilus in Great Swamp, New Jersey and Hyphodiscus theiodeus on a stick I had brought home from somewhere and left for months in my backyard. I feel I should be able to at least recognize the characteristics that define the genus, but obviously I'm not there yet.
Hans-Otto Baral, 30-01-2024 10:17
Hans-Otto Baral
Re : Possibly Helotiaceae? White/Off-white discomycete
Definition of the genus is not that easy, as often in taxonomy. In summary: Short stipes, warted (often tuberculate) hairs, small ellipsoid to fusoid spores, gelatinised ectal excipulum.

Do you know the paper by Quijada et al. on Hyphodiscaceae? It gives a generic diagnosis and a key to species.
Ethan Crenson, 30-01-2024 16:50
Re : Possibly Helotiaceae? White/Off-white discomycete
Thank you for the synopsis of the genus!  I have the Quijada paper and will study it.