19-10-2025 18:58
Bernard CLESSE
Bonsoir à toutes et tous,Il y a un peu plus de de
19-10-2025 14:10
Camille MertensBonjour à tous.Asco stipité 1mm de texture appar
17-10-2025 18:45
Riet van Oosten
Hello, Found by Laurens van der Linde, Oct. 2025.
23-09-2025 13:31
Thomas Læssøehttps://svampe.databasen.org/observations/10534623
15-10-2025 16:39
Edvin Johannesen
These tiny (0.2-0.6 mm), white, pulvinate apotheci
03-10-2025 13:44
Riet van Oosten
Hello, Found by Laurens van der Linde on Populus
13-10-2025 19:05
Louis DENYBonjour forumSur tronc décortiqué de feuillu x,
11-10-2025 20:27
Marcel Heyligen
Found on a barked branch, 14 mm in diameter, of Ro
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.
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
Hans-Otto Baral,
29-01-2024 20:26
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
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
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.