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13-09-2025 14:10

Wim de Groot

We found this hymenoscyphus on rubus fruticulosis.

13-09-2025 15:43

Edmond POINTE Edmond POINTE

Bonjour Christian,J'ai trouvé deux spores ressemb

11-09-2025 16:57

Jason Karakehian Jason Karakehian

Our revision of Marthamycetales (Leotiomycetes) is

13-09-2025 14:01

Thomas Flammer

dark brown apothecia, splitIKI-Spores biguttulate

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

02-09-2025 11:34

Thomas Læssøe

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

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

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Pyrenomycetes?
Mirek Gryc, 24-02-2020 20:05
Hi
Unfortunately, but my knowledge is too scanty about them to name this collection (
1) I don't see any gelatinous cover on the spores.
2) I also didn't notice germ slit.
3) KOH negative.
4) Substrate unknown (not excluded Populus sp.)?

I measured only mature spores (brown)
(8.9) 9.1 - 10.2 (10.4) × (3.9) 4.1 - 4.6 (4.7) µm
Q = (1.9) 2.1 - 2.3 (2.4); N = 11
Me = 9.6 × 4.4 µm; Qe = 2.2


10.23 4.44
  9.93 4.44
  9.11 4.07
  9.25 4.74
  9.78 4.61
  9.34 3.94
  9.28 4.46
  9.67 4.37
10.38 4.45
  9.52 4.16
  8.90 4.34


Thank you in advance for your help.
Mirek

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Josep Torres, 24-02-2020 21:31
Josep Torres
Re : Pyrenomycetes?
Hola Mirek, estas esporas me recuerdan a Nemania, hasta algunas veces puede ser alguna variedad de Nemania serpens , aunque las medidas de las esporas se quedan un poco cortas. Esto sería importante conocer las medidas del dispositivo apical.
Dejo un abrazo del género:

http://pyrenomycetes.free.fr/nemania/keydir/dichotomickey.htm

Saludos cordiales.
Mirek Gryc, 25-02-2020 10:06
Re : Pyrenomycetes?
Hi Josep
Thanks to you, I narrowed down the circle of suspects. At first I hesitated between Nemania and Hypoxylon.
Nemania serpens was initially rejected from the circle of suspects, although the macro was very similar. The dimensions of the apical apparatus in this genre are too large.
In my:
Me = 2.7 × 1.8 µm; Qe = 1.5

2.60 1.92
2.67 1.78
2.68 1.99
2.59 1.65
2.85 1.78


I considered Nemania atropurpurea. However, I have comments on the color of the spores. I would rather consider them light brown, whereas N. atropurpurea should be dark brown ??


I looked at all the possibilities and came to the conclusion that N. serpens is probably the most suitable for my collection.
However, taking into account the fact that the dimensions of my collection, despite being within the limits of this species, are however close to their limit values, therefore I should consider mine as:
Nemenia serpens sensu lato !?


I also measured the spores in KOH and they come out a bit bigger ??


I also measured the thickness of the spore wall. It turns out that they have> 0.5um which according to Czech Mykol can be a decisive feature in distinguishing these species. Nemania atropurpurea should have thinner.


Thank you and best regards
Mirek

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Jacques Fournier, 25-02-2020 19:07
Jacques Fournier
Re : Pyrenomycetes?
Hello Mirek and Josep,

this cannot be N. serpens owing to the euamyloid apical apparatus.

It does not fit well either N. atropurpurea, whose ascospores are darker brown and have a short but conspicuous germ slit.

I would place this fungus around N. colliculosa if the perithecial size fits, but a small-spored form.

Nemania species in the serpens group are often difficult to sort out and additional characters like texture (more or less carbonaceous), diameter of perithecia, colour of entostroma are required.

A good marker is that N. colliculosa is less carbonaceous than N. serpens and N. atropurpurea.

I advise you to read the monograph by Granmo et al. (1999) Sommerfeltia 27. Sorry, I don't have it as a pdf file.

Good luck!

Jacques
Mirek Gryc, 25-02-2020 19:35
Re : Pyrenomycetes?
Hi Jacques
Thank you very much for valuable suggestions.
This is my first Nemania collection which I microscoped so please forgive me for not providing all the features needed for identification. Beginnings are difficult and especially in such a difficult kind.
A comparison with N. serpens and N. atropurpurea at present is not possible. I don't have fruiting bodies for these species, but in time I'll try to make up for these shortcomings.
I downloaded the monograph on Granmo et al. (1999). if someone was also interested, it is available at:
https://www.researchgate.net/publication/259034689_The_genus_Nemania_sl_Xylariaceae_in_Norden

Regards
Mirek

Mirek Gryc, 22-04-2020 19:20
Re : Pyrenomycetes?
Welcome back.
I had some time to look more at Nemania.
Unfortunately, but I could not determine the species of this Nemania.
Perithecia too big (see photo). The feature set does not match any of the species described in "The genius Nemania".

I haven't found N. atropurpurea yet, but I've had the opportunity to compare fruiting bodies with N. serpens several times.
Regards
Mirek

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