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03-02-2013 19:50

Nina Filippova

Good time), I've compared this specimen with the

15-02-2026 04:32

Tomaz Vucko Tomaz Vucko

One more specimen that is giving me some descent a

17-02-2026 17:26

Nicolas Suberbielle Nicolas Suberbielle

Bonjour à tous, Je recherche cette publication :

08-12-2025 17:37

Lothar Krieglsteiner Lothar Krieglsteiner

20.6.25, on branch of Abies infected and thickened

17-02-2026 09:41

Maren Kamke Maren Kamke

Good morning, I found a Diaporthe species on Samb

17-02-2026 13:41

Isabelle Charissou

Bonjour, est-ce que quelqu'un pourrait me fournir

16-02-2026 18:34

Thierry Blondelle Thierry Blondelle

Bonjour,La micro de cet anamorphe de Hercospora su

16-02-2026 21:25

Andreas Millinger Andreas Millinger

Good evening,failed to find an idea for this fungu

16-02-2026 17:14

Joanne Taylor

Last week we published the following paper where w

16-02-2026 16:53

Isabelle Charissou

Bonjour, quelqu'un pourrait-il me transmettre un

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Helotiales on Betula leaf
Juuso Äikäs, 03-11-2024 07:27
This tiny (0.2 mm wide) brown cup fungus was growing on a decaying Betula leaf.

Asci 8-spored, IKI+(b). The asci have prominent basal protuberances, but seem to lack proper croziers.


There were some cylindrical cells without contents that might be paraphyses or marginal cells.


The excipulum seems to be of textura porrecta.


Spores:


9.6 - 11.89 (11.9) × (2.5) 2.53 - 3.28 (3.3) µm
Q = 3 - 4.1 ; N = 5
Me = 10.2 × 2.8 µm ; Qe = 3.6


 

Hans-Otto Baral, 03-11-2024 07:50
Hans-Otto Baral
Re : Helotiales on Betula leaf
I imagined Hyaloscypha fuscostipitata but that has definitely smaller spores and particularly strongly tapering hairs, also a dark base. And you are right: the ascus protuberance does not fuse. What seems to be paraphyses is not clearly alive, are you sure that the fungus has no VBs?
Juuso Äikäs, 03-11-2024 08:38
Re : Helotiales on Betula leaf
Thanks, I'm not entirely sure about VBs -- maybe the fruitbody wasn't in the best condition. Wish I had some extra material. There was some brown pigment on the outside, maybe from crushed cells?
  • message #80578
Hans-Otto Baral, 03-11-2024 08:56
Hans-Otto Baral
Re : Helotiales on Betula leaf
There are globose bodies with that colour which could point to multiguttulate VBs, but not sure.