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21-03-2026 15:13

MYXOMYCETICOLOUS FUNGI
Lepista Zacarias

Hello everyone, Does any one know of any literatu

21-03-2026 22:59

Hysteriaceae ??
Petr Soucek

Good evening, I would appreciate some advice on th

20-03-2026 12:53

Eutypa spec. (?)
Stefan Blaser

Hello everybody, In the field, from distance, my

20-10-2017 09:23

Hymenoscyphus ¿calycinoides?
Garcia Susana

Este otro crecía en el mismo trocito de madera qu

20-03-2026 16:16

Pseudomassaria-like on Cornus alba
Edvin Johannesen Edvin Johannesen

These 0.5 mm diam. acervuli were breaking through

19-03-2026 19:34

Xylariaceae? on Carpinus betulus wood
Filip Fuljer Filip Fuljer

Hello everyone,a few days ago I collected this str

19-03-2026 18:25

Myriosclerotinia curreyana?
William Slosse William Slosse

Good evening everyone, On 18/03/26 I found a few

17-03-2026 10:09

Lasiobelonium corticale ?
François Freléchoux François Freléchoux

Bonjour, Voici la description rapide d'un petit d

19-03-2026 15:58

"Lasiosphaerioid"
Stefan Blaser

Hello everybody, I hope for some hints... Macro:

19-03-2026 17:50

Massarina on Corylus
Enrique Rubio Enrique Rubio

Hi to everybodyThese thiny, blackish pseudothecia

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Rutstroemia? sobre madera
Rubén Martínez-Gil, 17-09-2017 12:05
Rubén Martínez-Gil

Hola a todos.


Subo unas fotos de una Rutstroemia? que encontré ayer sobre ramitas sin identificar, en bosque mixto de F sylvatica-Q pyrenaica, entre otros.


Esporas de 20-23 x 5,3-6,2 micras.


Ascas amiloides, pleurorrincas.


¿Qué les parece?


Gracias por su ayuda.


Rubén

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Hans-Otto Baral, 17-09-2017 13:15
Hans-Otto Baral
Re : Rutstroemia? sobre madera
Great! Rutstroemia for sure, but I do not remember such with navicular spores.

Quercus and Fagus you should be able to distinguish with the wood pores (ring-pored or not).  Did you look at a broken twig?

Zotto
Martin Bemmann, 17-09-2017 13:28
Martin Bemmann
Re : Rutstroemia? sobre madera
Why not R. firma? esp. when Quercus is possibly involved. See White's drawing attached.

Regards
Martin
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Hans-Otto Baral, 17-09-2017 13:33
Hans-Otto Baral
Re : Rutstroemia? sobre madera
You are right, Martin, my impression was that the spore ends are acute, but they are rather obtuse. 

The strange thing is that R. firma usually has curved spores, but I saw also populations with straight spores. These here are completely straight. I wonder if this is all the same.

R. firma was also mixed with R. alnobetulae in earlier times, who knows how many taxa exist.

I suspect that DNA would help....
Zotto
Martin Bemmann, 17-09-2017 13:42
Martin Bemmann
Re : Rutstroemia? sobre madera
The spores in Rubén's collection seem to have a sheath (fig. 6). Is this confirmed for R. firma?
Hans-Otto Baral, 17-09-2017 16:53
Hans-Otto Baral
Re : Rutstroemia? sobre madera
Such sheath has almost every Sclerotiniaceae and Rutstroemiaceae, and not only.
Rubén Martínez-Gil, 18-09-2017 17:52
Rubén Martínez-Gil
Re : Rutstroemia? sobre madera

Gracias por su ayuda, Zotto, Martin.


Subo unas fotos del palito donde las encontré. Mide 5 mm de diámetro. No tengo claro que sea de Quercus o Fagus.


La dejo de momento como R firma.


Saludos


Rubén

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