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08-12-2019 20:38

PASCAL DUBOC

cupules <2mm à centre gris bleuté, face exter

08-12-2019 11:01

Gilbert MOYNE

Bonjour, Un petit champignon que m'a remis Andgel

07-12-2019 18:45

Laurens van der Linde Laurens van der Linde

Hallo i found the P atrovinosa with a slime specie

07-12-2019 22:22

Rubén Martínez-Gil Rubén Martínez-Gil

Hola a todos. Subo unas fotos de un asco que hemo

06-12-2019 19:49

Edvin Johannesen Edvin Johannesen

Hi! Tiny, black, oblong stromata with pure white

27-11-2019 16:54

Rasmus Riis-Hansen Rasmus Riis-Hansen

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

05-12-2019 09:06

Valencia Lopez Francisco Javier

Hola amigosEstoy buscando este trabajo de la Errot

05-12-2019 19:35

Ibai Olariaga Ibarguren

Dear colleagues, I was wondering if anyone could

19-11-2019 18:05

Lothar Krieglsteiner Lothar Krieglsteiner

... under a twig of deciduous tree (likely Quercus

29-06-2011 22:52

Luc Bailly Luc Bailly

Encore trois ascos de la réserve naturelle domani

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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