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06-12-2019 19:49

Edvin Johannesen Edvin Johannesen

Hi! Tiny, black, oblong stromata with pure white

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Hi,I hope you can help med with this disc found a

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Lothar Krieglsteiner Lothar Krieglsteiner

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They grew on plant debris soaked in faeces togethe

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Pyreno on Rubus
Enrique Rubio, 25-09-2015 21:14
Enrique Rubio

Hi to averybody

Maybe you know this pyreno that makes very inconspicuous uniperitheciate inmersed perithecia on Rubus canes. Perhaps it has so peculiar microscopical data that make easy the identification?

Asci IKI and Melzer negative

Thanks in advance

  • message #38103
  • message #38103
  • message #38103
Hans-Otto Baral, 25-09-2015 22:54
Hans-Otto Baral
Re : Pyreno on Rubus
Hi Enrique

I have a plate of yours named Annulusmagnus (Annulatascus) triseptatus, 10.V.2009.

maybe something like this?

Martin Bemmann, 25-09-2015 23:23
Martin Bemmann
Re : Pyreno on Rubus
Hi Zotto and Enrique,

I had the same idea, but the apical aparatus in congo was not conspicuous enough to me. In Annulusmagnus it is very congophilous.
 Was it in moist or aquatic environment, Enrique?

Enrique Rubio, 26-09-2015 01:44
Enrique Rubio
Re : Pyreno on Rubus

Hi to both

It's sound strange because the cane is not in aquatic environnment and the ascospores seem to be smaller   (16–37 x 5–10 (Campbell & Shearer, 2004), and 24-32 x 8-10 for my own collections). But nevertheless they are similar enough...and the apical apparatus too.

The fungus was collected far from the water.


Hans-Otto Baral, 26-09-2015 08:57
Hans-Otto Baral
Re : Pyreno on Rubus
Your spore size is not smaller. I don't understand how it is possible to give such a wide range as Campbell & Shearer do. From their scale I arrive at ca. 23-28 x 6.5-8.5 µm.

Maybe Alain or Jacques can cmment on this sample. Do the perithecia have an elongate ostiolum?

Martin Bemmann, 26-09-2015 11:50
Martin Bemmann
Re : Pyreno on Rubus
The "16" at Campell&Shearer could be a typo for "26".
My own collections have a spore size range of 26-34x7-9 µm and 31-37x9-12 µm. So there is variation.

Alain GARDIENNET, 27-09-2015 15:57
Re : Pyreno on Rubus

Hi friends,

Zotto has well recognized microscopical features of A. triseptatus. And Martin is right with ascospores size. But terrestrial habit is very strange for a such species.

Have you more informations about this fungus ? I would like to see a vertical section of perithecia.


Enrique Rubio, 27-09-2015 17:10
Enrique Rubio
Re : Pyreno on Rubus

Hi Alain

Sorry but I don't have more information about this fungus. The perithecia were found by chance inmersed on a Rubus cane together with these other, but I did not keep this material.

Jacques Fournier, 28-09-2015 14:35
Jacques Fournier
Re : Pyreno on Rubus
sorry Enrique,
I missed your post.
Most likely a member of Annulatascaceae, indeed, microscopically fitting well this family, the short twisted stipe is typical of Annulusmagnus and Annulatascus. Based on your information the ascomata are deviating in gross morphology from what we know from aquatic habitats.
I see no reason why terrestrial counterparts of Annulusmagnus would not exist.
This fungus would be worth being re-collected and sequenced. If someone is interested...
Enrique Rubio, 28-09-2015 15:22
Enrique Rubio
Re : Pyreno on Rubus

HI Jacques

I'll try it!

Thanks a lot to all