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09-08-2020 15:33

Eduard Osieck

Can somebody provide a copy of GÖRKE, C. & H

09-08-2020 22:18

Lothar Krieglsteiner Lothar Krieglsteiner

... the spores of this find (today, in the Eifel,

08-08-2020 20:54

Antonio Couceiro

Ascoma de 5cm, creciendo entre raices de Prunus la

09-08-2020 23:56

Garcia Susana

Hola, He recogido estos apotecios sobre una rama

09-08-2020 07:55

Lothar Krieglsteiner Lothar Krieglsteiner

... maybe Molinia, in an acid bog (near Narthecium

09-08-2020 14:20

Castillo Joseba Castillo Joseba

De esta mañana en el himenio de una Daedaleopsis

09-08-2020 07:33

Lothar Krieglsteiner Lothar Krieglsteiner

... exactly Filipendula ulmaria, in the Eifel (Ger

09-08-2020 15:22

Eduard Osieck

This long papillate, bitunicate asco with muriform

09-08-2020 07:49

Lothar Krieglsteiner Lothar Krieglsteiner

... 8.8.20, in the Eifel (Germany), on the same lo

07-08-2020 00:14

Garcia Susana

Hola, He recogido este hongo creciendo sobre un t

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Calospora arausiaca?
Enrique Rubio, 12-04-2013 20:29
Enrique RubioHi to everibody


This fungus, collected on thin branches of Quercus robur, seems to be Calospora arausiaca (Fabre) Sacc. but do you know what's the actual status of this fungus?
In Whemeyer's Revision of Pseudovalsa....he says that could be only an inmature form of Pseudovalsa umbonata (actually Prosthecium pyriforme Jaklitsch & Voglmayr).
Close to the fruitbodys I have found acervuli and brownish conidia of perhaps their anamorphic state. Do you know if this conidia belong to the sexual state that I have found?
Could this fungus be an inmature state of Pseudovalsa longipes? 


Many thanks again
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Björn Wergen, 12-04-2013 21:27
Björn Wergen
Re : Calospora arausiaca?
Hi Enrique,

quite interesting finding, I think this is C. arausiaca, but I do not know anything about the anamorph.

regards,
björn
Hans-Otto Baral, 12-04-2013 21:59
Hans-Otto Baral
Re : Calospora arausiaca?
I know these conidia as Helminthosporium velutinum. Is it the anamorph of Letendraea helminthicola or only the host of the Letendraea (see Boudier pl. 580)? Is it  the anamorph of Chaetosphaeria as the IF pretends?

The Ana-Teleo database gives instead four further genera as teleomorph of Helminthosporium.

Zotto
Chris Yeates, 12-04-2013 23:24
Chris Yeates
Re : Calospora arausiaca?
With respect to Zotto; in my opinion this is not Helminthosporium (see image); Enrique specifically mentions acervuli and I think these are conidia of a Coryneum (Diaporthales) and therefore quite possibly a Pseudovalsa anamorph.
amitiés
Chris
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Hans-Otto Baral, 12-04-2013 23:33
Hans-Otto Baral
Re : Calospora arausiaca?
Yes, you are right Chris, I was surprised about the very strong similarity, the identical distosepta, and also the striate structure in the wall of the conidia. They look perfectly the same. When they are actually formed inside acervuli they cannot be the same.
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Chris Yeates, 12-04-2013 23:36
Chris Yeates
Re : Calospora arausiaca?
Hello Enrique - this may help - if you would like to see images of any particular species let me know
best wishes
Chris
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Jaklitsch Walter, 12-04-2013 23:49
Re : Calospora arausiaca?
Pseudovalsa longipes + Coryneum anamorph
Cheers, Walter

By the way, Enrique, you seem to mix up 2 things:
Pseudovalsa umbonata (Quercus!) is quite different from Prosthecium pyriforme (Acer!). P. umbonata has usually well-defined dark stromata, similar to P. lanciformis (Betula). P. longipes or e.g. P. modonia (Castanea) have weakly developed stromata. P. modonia has 1-septate spores but is still a Pseudovalsa. Important is the Coryneum anamorph. I did not believe it, but cultured from both ascospores and conidia. Sequences were identical !
P. longipes is variable, but has typically 3-5 septate ascospores. It seems to develop slowly and you find often immature asci. This species may co-occur with P. umbonata and often the Coryneum states (or teleomorph of one, anamorph of the other species) are mixed on the same twigs. Usually P. umbonata is more common than P. longipes, at least in Austria.

Enrique Rubio, 14-04-2013 12:35
Enrique Rubio
Re : Calospora arausiaca?
Thanks a lot to all!


So, Calospora arausiaca is a phantom species, only an inmature state of Pseudovalsa longipes? 
Has somebody images of mature ascospores of Pseudovalsa longipes?


Thanks in advance
Jaklitsch Walter, 14-04-2013 17:54
Re : Calospora arausiaca?
well, we simply do not know what Calospora arausiaca is. Fabre described it as Pseudovalsa with (1-)3 septate hyaline spores. It could be an immature stage of P. longipes (or P. umbonata??), but in both cases it is a later synonym. Neither Berlese illustrated it, nor did Wehmeyer receive type material, therefore it is likely that there is no type. We currently do not work on Pseudovalsa, i.e. we did not try to trace it.
Best wishes, Walter
Enrique Rubio, 14-04-2013 18:01
Enrique Rubio
Re : Calospora arausiaca?
Thanks, Walter!
chinthani senanayake, 30-09-2014 13:10
Re : Calospora arausiaca?
Hello Sir,
Do you have the pure culture of  Calospora arausiaca. I have collected a fungi looks same with this. if you have the culture, I can study further to resolve this.
thanks lot
chinthani
Enrique Rubio, 30-09-2014 13:16
Enrique Rubio
Re : Calospora arausiaca?

HI chinthani


I'm sorry but I didn't preserve, nor cultured, this fungus


 


Regards

chinthani senanayake, 30-09-2014 15:25
Re : Calospora arausiaca?
Thanks lot Sir, 
Did you deposit the specimen somewhere and is it posible to loan and examine.
regards
chinthani
Enrique Rubio, 30-09-2014 17:36
Enrique Rubio
Re : Calospora arausiaca?
No. Sorry. I didn't keep this material