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18-07-2025 23:03

Josep Torres Josep Torres

Hello.Fruitings between 51 and 130 microns in tota

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Bernard Declercq Bernard Declercq

Hello,I have trouble distinguishing above mention

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Michel Hairaud Michel Hairaud

Bonjour, Voici une espèce de  (?) Hyaloscyphace

15-07-2025 13:27

Angel Pintos Angel Pintos

Hello, does anyone have access to the following ar

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Riet van Oosten Riet van Oosten

Hello, Nearby the find of Calycina claroflava on

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Gernot Friebes

Hi,I wanted to share this collection on Rubus idae

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Gernot Friebes

Hi,do you think this collection could be R. ulmari

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Acanthostigma cf. scopulum from Fagus wood
Alex Akulov, 18-07-2011 21:51
Alex AkulovDear Friends

Today, during the review of other specimens from the Carpathians, I found Acanthostigma sp. sample (unfortunately, slightly immature). I think it can be Acanthostigma scopulum Peck.


I am never seen this species earlier, therefore I can not be sure.


Do you familiar with this species?


Grateful before,
Alex
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Gernot Friebes, 18-07-2011 22:00
Re : Acanthostigma cf. scopulum from Fagus wood
Hi Alex,

I don't think this is Acanthostigma. To me, your find resembles more to a Tubeufia.

Best wishes,

Gernot
Alex Akulov, 18-07-2011 22:18
Alex Akulov
Re : Acanthostigma cf. scopulum from Fagus wood

Thank you.


I contacted about this species with Andrew Miller. Till now we have not come for a unique solution of this question. Our first thought was that it is Tubeufia aurantiella, but the degree of development of setaes favors Acanthostigma.


Alex

Alex Akulov, 18-07-2011 22:45
Alex Akulov
Re : Acanthostigma cf. scopulum from Fagus wood

In various sources information about Acanthostigma (=Tubeufia) scopulum: the size and presence of septa in setaes, as well as pseudothecia colour, size of asci and ascospores for this species are different.


In Kodsueb, R. et al, Mycologia, 2004, 96(3): 667


Acanthostigma scopulum (Cooke & Peck) Peck, Bull. New York State Mus. 1:22 (1887) (figs. 1-6) 


Ascomata 145-250 µm diam, superficial, globose, solitary or gregarious, dark brown to black, membranous, ostiolate, with setae; setae (56-)80-90(-99) µm long, 4-6 µm wide at base, 1.5-2 µm wide at apex, dark brown, 1-2-septate, thick-walled, straight. Asci (64-)90-120(-130) x 8-10 µm (av. = 103 x 9.2 µm, n = 20), 8-spored, cylindric-clavate, bitunicate, short stalked, pseudoparaphyses. Ascospores (66-)70-85(-90) x 3-3.5(-4) µm (av. = 78 x 3.4 µm, n = 30), fasciculate, long-fusiform to cylindrical-fusiform, hyaline, straight or slightly curved, (5-)9-12-septate, smooth-walled, guttulate, lacking appendages and sheaths.
 
Substratum. - Wood submerged in streams, decaying wood (Fagus sylvatica, Pinus sp. and Tsuga sp.)

Known distribution. - Australia, Europe, Hong Kong and U.S.A.


In Barr apical setaes are non septate.

  • message #15901
Alex Akulov, 19-07-2011 10:04
Alex Akulov
Re : Acanthostigma cf. scopulum from Fagus wood

I have some news!


Now I receive the letter about my sample from Kevin Hyde (one of the world experts in Acanthostigma).


He wrote: 


Dear Alex
Yes I think so (Acanthostigma scopulum) although these taxa (Acanthostigma scopulum and Tubeufia aurantiella) do not split into Tubeufia and Acanthostigma when we do molecular work.
If you want to send me some dried material I will try to isolate it and sequence it
Best wishes
Kevin