Accès membres

Mot de passe perdu? S'inscrire

13-09-2025 14:10

Wim de Groot

We found this hymenoscyphus on rubus fruticulosis.

13-09-2025 15:43

Edmond POINTE Edmond POINTE

Bonjour Christian,J'ai trouvé deux spores ressemb

11-09-2025 16:57

Jason Karakehian Jason Karakehian

Our revision of Marthamycetales (Leotiomycetes) is

13-09-2025 14:01

Thomas Flammer

dark brown apothecia, splitIKI-Spores biguttulate

10-09-2025 23:53

Marcel Heyligen Marcel Heyligen

Found on Robinia pseudoacasia together with Diapor

10-09-2025 17:18

Blasco Rafael Blasco Rafael

Hola, encontre este estiercol de vaca estos apotec

02-09-2025 11:34

Thomas Læssøe

https://svampe.databasen.org/observations/10527903

07-09-2025 08:19

Josep Torres Josep Torres

Hello.Tiny pinkish discomycetes, photographed and

09-09-2025 12:07

Edmond POINTE Edmond POINTE

Bonjour amis mycologues,Trouvé sur moquette de ch

08-09-2025 19:07

ruiz Jose

Hola me pasan esta recolecta en madera de fraxinus

« < 1 2 3 4 5 > »
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
  • message #78063
  • message #78063
  • message #78063
  • message #78063
  • message #78063
  • message #78063
  • message #78063
  • message #78063
  • message #78063
  • message #78063
  • message #78063
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.