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30-05-2026 21:12

Lachnellula sur mélèze
Philippe PELLICIER

Sur branche de mélèze (Larix) près de la neige,

25-05-2026 16:35

Anamorphe d'Hypomyces aurantius ? sous saule cendré (Salix cinerea)
Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,J'ai trouvé récemment,

29-05-2026 15:35

Fusarium sur Robinier
daniel FERRE

Bonjour à tous,Je voudrais votre aide pour cette

28-05-2026 16:15

Literature request: Caloscypha fulgens f. caesioalba
James Mitchell

Hello,Does anyone have the original publication of

28-05-2026 11:06

Stictidaceae (?) on Typha latifolia - short-spored, I+ - Denmark
Thomas Læssøe

https://svampe.databasen.org/observations/10596750

23-05-2026 11:44

Coprophilous pyrenomycete wild boar dung
Charles Grapinet Charles Grapinet

Hello, I am having trouble identifying this copro

25-05-2026 16:44

Ascomata under epidermis Carex
François Bartholomeeusen

Hi forum members,During an excursion organised by

26-05-2026 21:25

small ascomycetes on Quercus sp.
Dirk Gerstner

Hello everyone, I'm completely stumped by this li

26-05-2026 22:44

Incrucipulum capitatum ?
Ethan Crenson

Hi all, I think I have Incrucipulum capitatum her

22-05-2026 14:44

minute Saccobolus from cow-dung (moist chamber from Portugal)
Lothar Krieglsteiner Lothar Krieglsteiner

in unripe condition citrine yellow, then soon fadi

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Rhizodiscina lignyota ?
Ethan Crenson, 13-02-2023 17:30
Hello all,

I collected this two days ago on bare hardwood in New York City.  I was expecting to bring home the much more common Patellaria crassispora, but this is obviously not that. Can anyone confirm this is Rhizodiscina lignyota, or if not, point me in the right direction?  I have a vague idea that R. lignyota is fairly common in some places, but I have never found it in my neighborhood.

Spores are brown, one septate, smooth, 9-10.5 x 3.7-4µm

Asci bitunicate, clavate, very faintly IKI+ staining blue over much of the upper surface, 44-56 x 9-10µm

Paraphyses septate, slightly constricted at the septa, up to 4.3µm wide at the tips.

Excipulum textura angularis

Thanks in advance,

Ethan
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Hans-Otto Baral, 13-02-2023 18:51
Hans-Otto Baral
Re : Rhizodiscina lignyota ?
I see no objection to your ID. Abundant brown anchoring hyphae should be there, which gave rise to the name Rhizodiscina. The species is really common.
Ethan Crenson, 13-02-2023 18:57
Re : Rhizodiscina lignyota ?
Thank you, Zotto!  in my experience, here in the Northeastern US, it isn't all that common.  I have found the very similar Patellaria crassispora and (occasionally) P. atrata at least 70 times (I checked my records), but I have never seen Rhizodiscina until now. 

I will look for the anchoring hyphae for extra credit.