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06-05-2024 08:27

Blasco Rafael

Blasco Rafael

Hola Buenos días.Alguno de ustedes tiene disponib

06-05-2024 10:02

Unknown perithecia on Osmunda!

François Bartholomeeusen

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

05-05-2024 12:55

Sylvie Le Goff

Bonjour Peut on dire que les poils soient vitreux?

05-05-2024 09:59

Anamorph on Carpinus bark

Gernot Friebes

Hello,I failed to identify this anamorph, which gr

19-04-2015 20:20

Literature aide on Pirottaea

Enrique Rubio

Enrique Rubio

Hi again Could you help me with this paper? NANN

30-04-2024 16:22

Could this be Ciborinia pseudobifrons?

François Bartholomeeusen

Dear forum members,On April 25 2024, I found one f

03-05-2024 18:04

Rutstroemia fruticeti?

Riet van Oosten

Riet van Oosten

Hello, Found by Laurens van der Linde on Rubus fr

02-05-2024 20:04

Hypoxylon fuscum

Ã©ric ROMERO

éric ROMERO

Bonjour, Une question à propos de la réaction a

01-05-2024 23:22

long-necked anamorph embedded in wood

Ethan Crenson

Hi all, Found late last week in a New York City p

29-04-2024 21:32

Yellowish asco on Pteridium aquilinum

Robin Isaksson

Robin Isaksson

Hi! Found in Sweden. Ascomata with haris, se

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)?

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

Björn Wergen, 16-03-2014 09:25

BjÃ¶rn Wergen

Re : Pale pyrenomycete with Tubeufia like spores

I have studied this collection and come to Conioscyphascus varius.

regards,
björn

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

BjÃ¶rn 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

BjÃ¶rn 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

BjÃ¶rn 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