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11-05-2024 18:08

Possible Mollisia nervicola
B Shelbourne B Shelbourne

• Mollisia on tree leaves: On dead Quercus leave

12-05-2024 11:48

Hypoderma (?) sur Euphorbia hyberna
Michel Hairaud Michel Hairaud

Bonjour , Voici une récolte d'une Rhytismataceae

10-05-2024 17:40

Nitschkia, no! It's a lichen
Anna Klos

Good afternoon, Thursday during an inventory we f

11-05-2024 00:33

asco possibly Encoelia-like, reviving after drying out and rehydrating
Ethan Crenson

I'm not entirely sure that Encoelia-like is the ri

11-05-2024 10:09

Leptostroma pdf?
Luc Bailly Luc Bailly

Hello all, Does anyone have access to this? Thyr

07-05-2024 00:04

tiny black gelatinous ascos
Ethan Crenson

A friend found these black gelatnous cups on a twi

09-05-2024 18:33

Aide
Enrique Rubio Enrique Rubio

Dear friendsDou you have a pdf copy of this paper?

09-05-2024 13:07

Literature request
Thorben Hülsewig

Hi there,i'm looking for following pdf:Morris, E.F

06-05-2024 10:02

Unknown perithecia on Osmunda!
François Bartholomeeusen

Good morning,At the end of an excursion in De Zegg

07-05-2024 19:26

Sur Rubus fruticosa
Louis DENY

Bonsoir forum Sur tige de rubus fruticosus de l'a

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Pale pyrenomycete with Tubeufia like spores
Eduard Osieck, 21-02-2014 16:19
On a small Fraxinus branch under the bark whitish to pale brownish globose ascomata (0,35-0,4 mm) with hyaline spores each filled with about ten strongly refractive drops: 40-54 x 4-5 mu, slighty bend at the ends, 5 septa in Melzer but otherwise only one or two vaguely visible. Asci cylindric, biseriate, unitunicate?, 150-160 x 8 mu, apical ring.

The spores look like those of Tubeufia cerea but it could be compared with characteristic specimens of this species growing on the same branch. In other features quite different: size of ascomata, asci length, apical ring (lacking in Tubeufia?) and spore septation.


No satisfactory outcome with the Tubeufia key of Rossman (1987). And Tubeufia is bitunicate. Tubeufia or other genera to consider? Does somebody know Conioscyphascus (Reblova 2004)?

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Alain GARDIENNET, 21-02-2014 16:42
Alain GARDIENNET
Re : Pale pyrenomycete with Tubeufia like spores

Hi,


See in Diaporthales. Some genus are possible (Pleuroceras, Linospora, ...)


Could yopu show us an ascomata ?


Alain

Eduard Osieck, 21-02-2014 21:57
Re : Pale pyrenomycete with Tubeufia like spores
Hi,

Alain, thanks for your suggestion to make a photo, it forced me to look further.
I have found more ascomata under the bark, some partly immersed in the rotten wood.
They were coloured olive greenish.

More important this time I found several with a papilla (about half the size of the ascoma).
Furthermore the ascomata are soft and start to collapse after 10-15 minutes.

Here is a photo of an ascoma, bad quality but it gives an idea how it looks.

Eduard
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Björn Wergen, 16-03-2014 09:25
Björn Wergen
Re : Pale pyrenomycete with Tubeufia like spores
I have studied this collection and come to Conioscyphascus varius.

regards,
björn
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Jacques Fournier, 16-03-2014 14:54
Jacques Fournier
Re : Pale pyrenomycete with Tubeufia like spores
Hi Eduard, on your photo 5 the ascl apical apparatus looks like blueing at base. Is it true or just my imagination?
Cheers,
Jacques
Björn Wergen, 16-03-2014 15:36
Björn Wergen
Re : Pale pyrenomycete with Tubeufia like spores
Hi Jacques,

the species is IKI-, I have tested it. It only turns red in Congo.

regards,
björn
Alain GARDIENNET, 16-03-2014 15:51
Alain GARDIENNET
Re : Pale pyrenomycete with Tubeufia like spores
Good job Björn !
Björn Wergen, 16-03-2014 15:59
Björn Wergen
Re : Pale pyrenomycete with Tubeufia like spores
Thanks Alain, I like to work with strange pyrenomycetes :P
Alain GARDIENNET, 16-03-2014 16:22
Alain GARDIENNET
Re : Pale pyrenomycete with Tubeufia like spores

Yes, I remarked !


And about strange ascos, I just found Pleospora herbarum on lichen !!! (on Peltigera rufescens), absolutely incredible but it is true.


Alain

Björn Wergen, 16-03-2014 16:38
Björn Wergen
Re : Pale pyrenomycete with Tubeufia like spores
This is undoubtely the variety Pleospora herbarum var. peltigerae :P
Eduard Osieck, 16-03-2014 22:51
Re : Pale pyrenomycete with Tubeufia like spores
Hi all,

I am of course happy that this collection has got a name.
Björn did a very good job, very frustrating to find something with clear features without being able to identify it.
I had considered the genus Conioscyphascus but was much in doubt because the spores look much broader in the drawings of Reblova & Seifert. Also I did not note the rather long neck (see fig. 27).

Jacques, the ascus top was not amyloid as photo 5 suggests.
I will check the original and I will come back on this tomorrow.

EDuard