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11-12-2019 23:29

Juuso Äikäs

I found these in a Picea abies dominated forest in

11-12-2019 22:21

BERNARD CLESSE BERNARD CLESSE

Bonsoir à toutes et tous,Pourriez-vous me confirm

08-12-2019 11:01

Gilbert MOYNE

Bonjour, Un petit champignon que m'a remis Andgel

13-12-2019 20:42

Götz Palfner Götz Palfner

Bonjour tous,Sorry, but as my French is crap, I wi

13-12-2019 16:20

Chris Yeates Chris Yeates

Bonjour tous this is an area I feel rather ignora

12-12-2019 23:42

Maren Kamke Maren Kamke

Hello together, can someone provide me with this

12-12-2019 18:36

Roland Labbé

Bonjours ! Voici un Trichoderma (Hypocrea) inconn

07-12-2019 22:22

Rubén Martínez-Gil Rubén Martínez-Gil

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

11-12-2019 23:25

Ethan Crenson

Hello all,This was found by a friend in New York C

09-01-2015 12:57

Alan Rockefeller Alan Rockefeller

I found this in a semitropical area of Queretaro,

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Phaeosphaeria epicalamia??
Mlcoch Patrik, 11-03-2017 18:30
Mlcoch PatrikHello to everyone,
Can be this Phaeosphaeria epicalamia? Pseudothecium subglobose, subepidermide, 500 um wide, 210 um high, ostiole conic, 112 um wide. Ascus cylindrical, 70 - 100 x 7,5 - 12,2 um. Ascospore biseriate, 5 - 6 (rare 7) septate, brown, fusoid, third cell largest, (23,5)24 - 27 x 5 - 6,5 um, Q=4,6.
On dead steams of the Calamagrostis sp.

Please about determinate, Thank you.
Patrik Ml?och

  • message #47834
Peter Thompson, 12-03-2017 00:11
Re : Phaeosphaeria epicalamia??
Hello Patrik,

It seems that the entry in the Ascofrance database shows Phaeosphaeria epicalamia as having 5-septate spores with the second cell swollen, so this is different from yours.

I think that the spores which you illustrate with more than 5 septa are in poor condition and may have developed one or two more septa because of becoming over mature.

If the spores of your sample are mostly 5-septate, the Ellis & Ellis book Microfungi on Land Plants suggests Phaeosphaeria luctosa as having been recorded on Calamagrostis. The spores of this species closely resemble the spores of your collection, which are in good condition.

I suggest that this would be most likely to be your fungus.

With Best Wishes,
Peter Thompson.
Chris Yeates, 12-03-2017 13:32
Chris Yeates
Re : Phaeosphaeria epicalamia??
Hello Patrik

As pointed out by Peter Thompson Phaeosphaeria epicalamia has the second cell from the apex broadest - see Enrique Rubio's recent addition to the Database; in that it somewhat resembles P. nigrans.

I have run your fungus through the keys in Shoemaker & Babcock's Monograph in Canadian Journal of Botany 67: pp.1500-99, (1989) and it comes out in their subgenus Vagispora. Although your spore measurements are rather on the short side I agree with Peter, I think this is P. luctuosa, which has a wide host range within the Poaceae. Compare with http://www.ascofrance.com/search_recolte/2765 and http://www.ascofrance.com/search_recolte/4327 (zoomable PDF also available with the latter).

Cordialement
Chris
Mlcoch Patrik, 12-03-2017 14:07
Mlcoch Patrik
Re : Phaeosphaeria epicalamia??
Thank you, 
I determinated by Phaeosphaeria (Shoemaker and Babcock) and I more likely looking for between subgenus Sicispora.
Chris Yeates, 12-03-2017 14:29
Chris Yeates
Re : Phaeosphaeria epicalamia??
Yes, that can be a difficult separation. The confusion can arise by what they mean by the "first septum". I have always taken it to mean the first septum to develop as the spores mature. A useful guide is that this is usually the most constricted one.
Mlcoch Patrik, 12-03-2017 17:08
Mlcoch Patrik
Re : Phaeosphaeria epicalamia??
O.K. Thank you for clarification Chris.