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02-09-2025 11:34

Thomas Læssøe

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

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

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

03-09-2025 21:59

Philippe PELLICIER

La Léchère, Col de la Madeleine, alt 1970m, au s

06-09-2025 21:40

David Chapados David Chapados

Hi, Does somebody know the genus that has those b

07-09-2025 11:34

Zuzana Sochorová (Egertová) Zuzana Sochorová (Egertová)

Hello,I have identified this fungus as Hymenoscyph

05-09-2025 09:32

Nicolas VAN VOOREN Nicolas VAN VOOREN

Bonjour, hi everyone,Do you know where the fungari

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Octospora rubens, Octospora rustica?
Riet van Oosten, 16-02-2020 15:25
Riet van Oosten
Hello,

Just a try :-)

Found by Rene Hoogenboom, Febr. 2020, The Netherlands (coastal area, Noordhollands duinreservaat). The moss species is Ceratodon.

Fruitbody: about 2 mm

Asci, lenght: (194.6-)221.4-226.7 µm

Spore size: 14.7-15.0 x 10.3-10.7 µm

Greetings, Riet
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Charles Aron, 16-02-2020 16:44
Charles Aron
Re : Octospora rubens?

Hi,


I would suggest that you have Octospora rustica-your spore dimensions fit nicely with that species. I have recently collected O. rubens from burnt ground and the spores were 16-19 x 11.5-13 and also the paraphyses tips were a bit more swollen. I've used Microfungi on Land Plants by Ellis and Ellis which may be slightly dated.


Regards,


Charles.

Riet van Oosten, 16-02-2020 17:10
Riet van Oosten
Re : Octospora rubens?
Thank you very much for your reaction Charles!
Marcel Vega, 16-02-2020 19:47
Re : Octospora rubens, Octospora rustica?
Hi dear Riet,
I agree with your determination.
Beside the colour of the apothecia, hence the species name, apos of O. rubens often (but not always) show a distinct margin whereas O. rustica does not. But, more important, on your nice pics of live material one can observe the vacuolar bodies in the paraphyses -a feature paraphyses of O. rustica do not have.
Here's some more info in case you were interested:
https://www.repository.naturalis.nl/document/569807
Cheers,
Marcel
Zuzana Sochorová (Egertová), 16-02-2020 20:28
Zuzana Sochorová (Egertová)
Re : Octospora rubens, Octospora rustica?
Hi Riet, Charles and Marcel, 
yes, the content of paraphyses as well as colour of apothecia fit well Octospora rubens. It's nicely illustrated by Billekens. But what about the structure of ectal excipulum? In this aspect Riet's find is definitely more similar to O. rustica, at least when comparing with the illustrations from the paper mentioned above. 
I also have a find from Olomouc combining paraphyses with VBs + ectal excipulum formed by textura globulosa-angularis. Zuzana 
Riet van Oosten, 16-02-2020 21:04
Riet van Oosten
Re : Octospora rubens, Octospora rustica?
Dear Charles, Marcel and Zuzana
Thank you for your help and information!
Peter Püwert, 16-02-2020 21:10
Peter Püwert
Re : Octospora rubens, Octospora rustica?
Hi, I can't contribute to the structure of the excipulum, but here two very old microfoto and a link to an interest website.

Greetings Peter.

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Riet van Oosten, 16-02-2020 21:26
Riet van Oosten
Re : Octospora rubens, Octospora rustica?
Thank you for the link and your photos Peter! 
With the names of Zuzana and Marcel on the first page!
Charles Aron, 16-02-2020 22:07
Charles Aron
Re : Octospora rubens, Octospora rustica?

Hi',


In the light of all this additional information I would concede that O. rubens is much more likely and that what I had found (apothecia more orange and paraphyses lacking vacuoles) fits much better with O. rustica.


Regards,


Charles.

Riet van Oosten, 17-02-2020 12:29
Riet van Oosten
Re : Octospora rubens, Octospora rustica?
Hi,
Thanks again for all your help and info!
If there are no objections I'll name this find Octospora rubens.
Greetings,
Riet