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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

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

03-09-2025 21:59

Philippe PELLICIER

La Léchère, Col de la Madeleine, alt 1970m, au s

06-09-2025 21:40

David Chapados David Chapados

Hi, Does somebody know the genus that has those b

07-09-2025 11:34

Zuzana Sochorová (Egertová) Zuzana Sochorová (Egertová)

Hello,I have identified this fungus as Hymenoscyph

02-09-2025 11:34

Thomas Læssøe

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

05-09-2025 09:32

Nicolas VAN VOOREN Nicolas VAN VOOREN

Bonjour, hi everyone,Do you know where the fungari

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Amicodisca sp. ?
Francois Guay, 31-10-2024 04:07
Francois GuayLast week, I found what appears to be an Amicodisca sp. growing on what I believe to be Fagus grandifolia (American beech) or red maple leaves, though I can’t be certain as the leaves are quite decomposed. They reach about 300 microns in diameter. 
Microscopy was done in water and Baral. Any insights on its identification would be appreciated. Thanks!

Take a look at the iNat observations for photos, because I can't seem to find how to upload them here.

Hans-Otto Baral, 31-10-2024 08:15
Hans-Otto Baral
Re : Amicodisca sp. ?
Hello, yes, this is clearly an Amicodisca. A. svrcekii seems close, but that has larger spores with a higher lipid content and grows on wood.

There exists a"Trichodiscus" virescentulus (Mouton) Dennis 1963: 374 on Carpinus leaves  (Ellis & Ellis 1985: 70 have a sample on Acer leaves.

Possibly the same is Incrupila sulphurea.

Lothar Krieglsteiner made a collection and drawing on Fagus leaves in Kehlheim (Bavaria). See my folder on Amicodisca.
Francois Guay, 31-10-2024 16:34
Francois Guay
Re : Amicodisca sp. ?
Thank you, Zotto! It does fit, and there is not much information or observations of it on the internet. I see that IF says the actual name is Dennisiodiscus virescentulus. Is this valid? Or should I call it Trichodiscus virescentulus? I will update the species ID on iNaturalist.
Hans-Otto Baral, 31-10-2024 17:02
Hans-Otto Baral
Re : Amicodisca sp. ?
The genus Dennisiodiscus is a Pyrenopezizaceae, and Trichodiscus is an earlier but invalid name for Dennisiodiscus. So you may use in apostroph "Dennisiodiscus".
Francois Guay, 31-10-2024 17:52
Francois Guay
Re : Amicodisca sp. ?
Perfect, Thank you !
Francois Guay, 31-01-2025 21:21
Francois Guay
Re : Amicodisca sp. ?
Hi Otto, I got the ITS sequence back from this specimen, here is the Mycomap blast link and the inat link.

Mycomap: https://mycomap.com/genetics/blast-search/-r248671/

iNat: https://www.inaturalist.org/observations/248963428
Hans-Otto Baral, 31-01-2025 21:54
Hans-Otto Baral
Re : Amicodisca sp. ?
Very good! I see a certain similarity with Amicodisca virella and A. svrcekii, but different enough to be a species f its own. The growth on leaves is also different from those.

Do you have the sequence? I would like to include it in a tree. Does it have an exact date?
Francois Guay, 31-01-2025 22:08
Francois Guay
Re : Amicodisca sp. ?
Very interesting. Can you give me your email? I will send you the file, thank you

François Guay
Hans-Otto Baral, 01-02-2025 09:33
Hans-Otto Baral
Re : Amicodisca sp. ?
It is in the database of ascofrance also.