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10-08-2022 15:45

Pierre-Yves Julien

Récolte le 31/07/2022 – Ozoir-la-Ferrière (77)

04-07-2022 18:45

Enrique Rubio Enrique Rubio

I can find no suitable answer for this white Bryos

11-08-2022 08:16

Josep Torres Josep Torres

Hola.Un muy diminuto Pirenomyceto sobre un tronco

11-08-2022 00:45

Stefan Jakobsson

On a thin deciduous stick (Salix/Alnus/Betula) on

10-08-2022 09:11

Josep Torres Josep Torres

Hola.Un Piremomyceto recogido este pasado domingo

10-08-2022 18:45

François Bartholomeeusen

Good evening all, On 5 August 2022, a friend gave

09-08-2022 20:06

Stephen Mifsud Stephen Mifsud

I have found an interesting aspergillus on flowers

06-08-2022 22:20

Marcus Yeo

I found this ascomycete today on dead leaves of Er

16-07-2022 17:01

Zetti Mario

Hi, I am doing some work with microfungi and durin

02-08-2022 17:48

Pierre-Yves Julien

Récolte le 31/07/2022 – Ozoir-la-Ferrière (77)

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Hyaloscypha herbarum?
Zuzana Sochorová (Egertová), 09-11-2021 15:06
Zuzana Sochorová (Egertová)Hello,
I have here an ascomycete collected in Moravia, in elevation 220 m a.s.l., on strongly decayed stem of a broad-leaved tree (dominant species in the place are Populus tremula, Betula pendula and Alnus glutinosa). 
Ascospores hyaline, sometimes septate, (7.6) 9.7 - 12.1 (13.7) × (2.4) 2.7 - 3.1 (3.4) µm
Q = (2.5) 3.2 - 4.3 (5.4, Me = 10.7 × 2.9 µm; Qe = 3.7
Asci without croziers, IKI+, MLZ+, (49.3) 53.5 - 64.3 (73.7) × (7.1) 7.7 - 8.5 (8.9) µm
Q = (6.3) 6.33 - 8.4 (9.5), Me = 59 × 8.1 µm; Qe = 7.3.
Hairs are smooth.

Using Seppo Huhtinen´s key, I came to Hyaloscypha herbarum, although the asci are longer. Also the pattern of lipid bodies is different than I can see in Enrique Rubio´s photos.
Can somebody confirm H. herbarum or suggest a better option?
Thank you, Zuzana
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Zuzana Sochorová (Egertová), 09-11-2021 15:08
Zuzana Sochorová (Egertová)
Re : Hyaloscypha herbarum
more
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Hans-Otto Baral, 09-11-2021 20:28
Hans-Otto Baral
Re : Hyaloscypha herbarum?
Hi Zuzana

could you please provide a photo of the hairs? What I see in section looks more like a Cistella, but it is too small.

Zotto
Zuzana Sochorová (Egertová), 09-11-2021 21:33
Zuzana Sochorová (Egertová)
Re : Hyaloscypha herbarum?
Hi Zotto,
thanks, I cannot take photos today, hopefully tomorrow.
I must admit that I haven´t observed many hairs, they are rather inconspicuous.
But I can see in Raitviir 2004 that almost all species of Cistella have asci arising from croziers.
The only one with simple septa is C. grumosa (on fallen leaves of Acer) + in a few species it´s not indicated whether they have croziers. In my collection I am sure they are lacking.
Zuzana
Hans-Otto Baral, 09-11-2021 21:55
Hans-Otto Baral
Re : Hyaloscypha herbarum?
I agree, actually all on wood that I know have croziers. Anyway it would be good to see the shape and size of the hairs.
Zuzana Sochorová (Egertová), 10-11-2021 19:24
Zuzana Sochorová (Egertová)
Re : Hyaloscypha herbarum?
Now I have checked another part of the collection and the margin of apothecia look smooth. The margin is formed by elongated, smooth cells.
In the part from yesterday, there is another microscopic fungus growing on the wood between apothecia and also on them, and what I considered hairs were apparently belonged to this fungus.
Therefore, I must be in a wrong genus. Attached photos of paraphyses (hyaline, without VBs, not broadened at apex) and the margin.
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Hans-Otto Baral, 10-11-2021 21:14
Hans-Otto Baral
Re : Hyaloscypha herbarum?
Indeed, this makes it really difficult. Although Hyaloscypha may occur without hairs (former Parorbiliopsis), such even a little clavate hairs remind me more of Cistella.

Intriguing I find the allantoid spores. But as you say, Cistella without croziers seems impossible.

Zotto
Zuzana Sochorová (Egertová), 11-11-2021 19:53
Zuzana Sochorová (Egertová)
Re : Hyaloscypha herbarum?
Hmm, I felt already in the field I should better pretend I cannot see this fungus :-) Anyway, thank you for your help.