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30-06-2025 12:09

Edvin Johannesen Edvin Johannesen

This tiny, rather "rough" erumpent asco was found

30-06-2025 16:56

Lydia Koelmans

Please can anyone tell me the species name of the

30-06-2025 14:45

Götz Palfner Götz Palfner

This is a quite common species on Nothofagus wood

30-06-2025 06:57

Ethan Crenson

Hi all, Another find by a friend yesterday in Bro

30-06-2025 19:05

ALAIN BOUVIER

Bonjour à toutes et à tousJe cherche à lire l'a

25-06-2025 16:56

Philippe PELLICIER

Bonjour, pensez-vous que S. ceijpii soit le nom co

29-06-2025 18:11

Ethan Crenson

Hello all, A friend found this disco yesterday in

28-06-2025 17:10

Peter Welt Peter Welt

I'm looking for: RANALLI, M.E., GAMUNDÍ, I.J. 19

28-06-2025 16:00

Josep Torres Josep Torres

Hello.A tiny fungus shaped like globose black grai

27-06-2025 14:09

Åge Oterhals

I found this pyrenomycetous fungi in mountain area

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Octospora rubens ?
Beñat Jeannerot, 24-04-2010 15:03
Beñat JeannerotBonjour à tous,

Une récolte faite dans mon jardin, sur la terre nue mêlée de mousses (Pottia ?). Petits groupes d'apothécies de moins de 0,2 cm, orangé, ne se touchant pas. Semble être liée aux mousses mais...

Micro : Spores un peu en calisson, lisses, hyalines, une grande guttule, 16.4-19.3 x 9.1-10.7 µm, X= 18 x 9.9 µm, Q=1.82.
Asques x 16-18 µm
Paraphyses contenant quelques gouttelettes orangées isolées, semblant un peu courbées vers le sommet (caractère pas toujours observé), clavées.

Avec la clé de Michel C. & Gilbert M., j'arrive sur Octospora rubens.
Qu'en pensez-vous ?
Merci d'avance,
Beñat
  • message #11229
Beñat Jeannerot, 24-04-2010 15:03
Beñat Jeannerot
Re:Octospora rubens ?
Spores
  • message #11230
Beñat Jeannerot, 24-04-2010 15:03
Beñat Jeannerot
Re:Octospora rubens ?
Paraphyses
  • message #11231
Richard Korf, 24-04-2010 16:09
Re:Octospora rubens ?
Did you check ascus reaction in Lugol's or Melzers?

Dick
Hans-Otto Baral, 24-04-2010 18:01
Hans-Otto Baral
Re:Octospora rubens ?
The oil drops are important in Octospora. I see them very faintly in the dead spores of your photos. Did you find it presently? Why not live photos? I remember I had problems with O. rubens, a collection still not clearly identifiied.

Zotto
Beñat Jeannerot, 24-04-2010 18:44
Beñat Jeannerot
Re:Octospora rubens ?
Hi Dick and Zotto,

To Dick : Melzer reaction of asci : J-
To Zotto : Why do you mean spores are dead ? Because I have collected specimens and I threat it directly with cotton blue (10 minutes) and under oil immersion. So, live spores photos...
I don't know if I made an error ??

Beñat
Beñat Jeannerot, 24-04-2010 19:03
Beñat Jeannerot
Re:Octospora rubens ?
Re,

I just go find a specimen and I have attached a photo of spores in tap water.
Thanks for your help,

Beñat
  • message #11236
Hans-Otto Baral, 24-04-2010 21:04
Hans-Otto Baral
Re:Octospora rubens ?
Yes, that looks better! Clearly, if you place ascos in CB ( with lactophenol etc.) the elements die. I assume your photos have the same scale. If so the spores show a distinct shrinkage.

My first idea when I see the spores is O. axillaris var. dennisii Itzerott. This variety is on the DVD (HB 1375, 2514), at least at that time I was sure with the identity. The oil drops are a bit more toward one end. First I thought the spores of your find are too narrow. But did you measure them also in water? Please do that, I fear that they will then be larger.

The small associated moss in my old finds could be a Pottiaceae too.

Dieter Benkert reexamined in 2002 HB 1375 and 2514, and his comment to 2514 was: O. cf. crosslandii with Pottia & Bryum (1375 he did not comment). O. crosslandii I actually never found with certainty.

Zotto
  • message #11238
Beñat Jeannerot, 24-04-2010 21:35
Beñat Jeannerot
Re:Octospora rubens ?
Hi Zotto,

Thanks for your note. Ok for spores in lactophenol are dead. I know that but I think Scutellinia. And works on Scutellinia are often with measurements made in the CB (for ornementation). The variation in measurements may depend on personal habits. Personally, I measure everything in the CB for not having problems. A good discussion in perspective...:)
I just measure spores in water (n=30) : 17.1-20.3 x 9.6-11.3 µm.
And I just receive a mail from Raùl Tena Lahoz, a spanish friend which are specialized and interested by genus Octospora and Lamprospora and he suggests to me the same issue that you at the end of your message : Octospora crosslandii is certainly a good idea for this collection.
I think you certainly both right.
Many thanks again,

Beñat

Hans-Otto Baral, 24-04-2010 21:42
Hans-Otto Baral
Re:Octospora rubens ?
O.k., your spores are still a bit smaller and the LB a bit more central than mine, so perhaps my finds are a different species, or not, who knows.

Zotto
Beñat Jeannerot, 24-04-2010 22:29
Beñat Jeannerot
Re:Octospora rubens ?
No, no, no, Zotto, I'm not sure of anything ...
I know nothing about these genus, I've just found in the garden ...
Personally, I affirm nothing ... far be it from me ...
Excuse me if I have seemed presumptuous,
Very amically,

Beñat
Gilbert MOYNE, 25-04-2010 18:59
Re:Octospora rubens ?
Bonjour Beñat
Cette forme plus ovoïde des spores correspond en effet mieux à O. crosslandii.
O. rubens a les spores plus régulièrement elliptiques et la goutte reste centrale.
Elles sont aussi en général plus petites (16-18)
Gilbert

Beñat Jeannerot, 25-04-2010 21:30
Beñat Jeannerot
Re:Octospora rubens ?
Merci beaucoup Gilbert.
Je vois un peu mieux O. crosslandii effectivement par rapport aux planches de votre article.

Beñat