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20-04-2019 01:02

Valencia Lopez Francisco Javier

Hola a todos/asAdjunto fotos de unas supuestas Tri

21-04-2019 21:40

Joop van der Lee

Found on cow dung.Measurements of the perithecia a

21-04-2019 12:06

Castillo Joseba Castillo Joseba

Me mandan el material desde Galicia,  recolectado

20-04-2019 10:47

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me envian esta muestra recolectada en madera de eu

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Bonjour ! Voici un anamorphe inconnu de nous, Sp

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Castillo Joseba Castillo Joseba

Especimen  con apoterios en forma de disco de col

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Malcolm  Greaves Malcolm Greaves

HelloCan someone help with this found on a dead/dy

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Dear forum, On the bark of Larix I found some som

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Ethan Crenson

I find this unknown (to me) asco in the same locat

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Black Asco Embedded in Leaf of Carex riparia
Peter Thompson, 23-03-2019 16:06
Hello Everyone,

I have found perithecia of a black ascomycete embedded just under the epidermis of a dead leaf of Carex riparia. The fruit bodies seem to be growing individually and spaced out along the two edges of the leaf. They measure approximately 0.3 mm diameter.

The spores are brownish green, 1-septate and slightly constricted at the septum. Each cell contains large and small guttules. The spore dimensions range from 19.5 to 25 x 6 - 7 um and there is a hyaline, sharply pointed appendage at each end, each measuring 7 um. The spores and their appendages seem to mostly be slightly curved.

The 8-spored asci seem to radiate from a central area. Spores are arranged in one or two rows inside and lugol distinctly blues the ascus tip. 

I have attached images of the fruit bodies in situ, spores, asci and excipulum.

I wonder if anyone has any ideas as to what this might be?

Thank You,
With Best Wishes,
Peter.
  • message #56944
  • message #56944
  • message #56944
  • message #56944
Alain GARDIENNET, 23-03-2019 21:14
Alain GARDIENNET
Re : Black Asco Embedded in Leaf of Carex riparia

Hi Peter,


Compare to Ceriophora palustris please.


Alain

Alain GARDIENNET, 23-03-2019 21:16
Alain GARDIENNET
Re : Black Asco Embedded in Leaf of Carex riparia

If you have a lot of material, I would be happy to look at it.


Alain

Peter Thompson, 23-03-2019 21:29
Re : Black Asco Embedded in Leaf of Carex riparia
Hello Alain,

Thanks for your reply.

I considered Ceriophora palustris, as the closest species in Ellis & Ellis, growing on Carex, but it is not correct. E.g. my sample has 7 um long, tapering and pointed appendages on the ends of the spores, not the shorter, rounded appendages of C. palustris.

I have at least 30 more fruit bodies. If you would like to email your address to me, I will be pleased to post the sample to you.

With Best Wishes,
Peter.
Alain GARDIENNET, 24-03-2019 17:41
Alain GARDIENNET
Re : Black Asco Embedded in Leaf of Carex riparia

14 rue roulette


21260 VERONNES


France


 


Thanks,


Alain

Peter Thompson, 26-03-2019 23:10
Re : Black Asco Embedded in Leaf of Carex riparia
Hello Alain,

Thanks for providing your address.

The sample will be posted to you tomorrow morning.

With Best Wishes,
Peter.