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13-10-2025 19:05

Blanc sur tronc décortiqué
Louis DENY

Bonjour forumSur tronc décortiqué de feuillu x,

17-02-2013 21:11

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Peter Welt Peter Welt

Jamoni, P.G. 1998. Un nuovo discomicete coprofilo

11-10-2025 20:27

On Robinia pseudoacasia
Marcel Heyligen Marcel Heyligen

Found on a barked branch, 14 mm in diameter, of Ro

11-10-2025 14:20

Chromelosporium
Jean-Luc Ranger

bonjour à tous, Je ne vois pas comment l'on peut

09-10-2025 22:14

Hymenoscphyus or Bryoscyphus? Yellow cup / white stipe
S. Rebecca

We just had the Bavarian Mycology Conference in Au

10-10-2025 00:49

Amicodisca svrcekii ?
Ethan Crenson

Hello all, This was found last weekend on a hardw

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Lophiostoma
David Chapados David Chapados

Hi, Could anyone help me with this Lophiostoma? 

04-10-2025 02:13

Hymenoscyphus with a reddish stipe
Francois Guay Francois Guay

Hi everyone,   I found this Hymenoscyphus growi

03-10-2025 22:17

White asco on Fagus grandifolia leaf
Francois Guay Francois Guay

Hi everyone,   I found this white, star-shaped

03-10-2025 22:03

Unknown asco found in a root hole
Francois Guay Francois Guay

Hi everyone, I found this weird asco growing on wo

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Very small global ascomycete, hyalin, smooth spores. Any ideas?
S. Rebecca, 22-08-2021 15:19
I found this tiny ascomycete in a bank of earth close to a stream in the Austrian Alps where I live (1200m). I have been asking around, but do not have any good leads yet. I was able to collect about 8 specimens and they do have a smell but hard to describe. Maybe a little like metal? I hope someone recognizes something.

Due to the spores being translucent, I thought maybe Orbilia, but someone said absolutely not Orbilia. Possibly something related to hypogae?

The specimens have a hole in them.
J- (Lugol)
Spore size 18-22µm
Ascus = 8 spores
Each spore has a hull or sack and you can see them split.

I can add microscopic features if you tell me what to look for. 
Thanks, -Rebecca
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Gernot Friebes, 22-08-2021 15:44
Re : Very small global ascomycete, hyalin, smooth spores. Any ideas?
Dear Rebecca,

as I have posted in a different forum a short while ago, this looks like Stephensia (Hydnocystis) bombycina (compare to https://www.nahuby.sk/obrazok_detail.php?obrazok_id=588562).

Best wishes,
Gernot
S. Rebecca, 22-08-2021 15:51
Re : Very small global ascomycete, hyalin, smooth spores. Any ideas?
Thank you so much Gernot! The soul can rest. :-)
Adam Polhorský, 22-08-2021 16:37
Re : Very small global ascomycete, hyalin, smooth spores. Any ideas?
Hi Gernot, Rebecca

Some time has passed since that find. I now think, I might have not identified it correctly.

Stephensia colomboi might be better name for our collections. S./H. bombycina is a larger, hypogeic species, whereas colomboi is smaller, often only partially buried. Both seem to have an unpleasant odour.

A.
Gernot Friebes, 22-08-2021 17:17
Re : Very small global ascomycete, hyalin, smooth spores. Any ideas?
Thanks for this hint, Adam. I don't have the original description of S. colomboi but I compared with Sarasini et al. (Funghi Ipogei Lariani), where it is mentioned that S. colomboi should have an "insignificant" odour, wheres S. bombycina is said to smell much more intensely (like fried onions or boiled cabbage). Macroscopically this collection shows more similarities with S. colomboi, so I concur with you that this is likely the better name.

Best wishes,
Gernot