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03-11-2024 17:36

B Shelbourne B Shelbourne

• Macro and habitat suggest Hymenoscyphus s.l.,

03-11-2024 07:27

Juuso Äikäs

This tiny (0.2 mm wide) brown cup fungus was growi

02-11-2024 16:34

B Shelbourne B Shelbourne

• Host suggests Sawadaea bicornis or Phyllactini

01-11-2024 14:54

Rot Bojan

Can someone tell me more about this mushroom pleas

31-10-2024 22:25

Karen Poulsen

Hello, On half weathered Betula leaf, I noticed t

31-10-2024 21:42

Karen Poulsen

Hello, On last year's pine needles on the ground

31-10-2024 04:07

Francois Guay Francois Guay

Last week, I found what appears to be an Amicodisc

28-10-2024 17:51

B Shelbourne B Shelbourne

• Macro and habitat suggest Hymenoscyphus s.l.,

24-10-2024 23:07

Patrice TANCHAUD

Bonsoir, récolte réalisée sous hêtres et chê

28-10-2024 23:30

Marc Detollenaere Marc Detollenaere

Dear Forum,I found some small fruit bodies of abou

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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 !