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28-01-2020 08:49

Mirek Gryc

HiA few days ago I found on the branch Quercus, Tr

03-04-2020 14:56

Eduard Osieck

Recently this synnamatous hyphomycete (length 0,2-

03-04-2020 21:31

Guy Buddy

Greetings,I am curious on your opinion if you thin

03-04-2020 20:45

Juuso Äikäs

Yesterday I found some Orbilias growing on a falle

03-04-2020 13:53

Iosif Sandor Iosif Sandor

Hi forum, I guess that these are "lachnum virgini

22-08-2018 17:52

Johan Myhrer

Found these on dead stems of Equisetum fluviatilis

03-04-2020 10:03

Angel Pintos Angel Pintos

hello, anybody can provide the following article?B

28-03-2020 19:45

Muñoz González Guillermo

Bonsoir,Je voudrais connaître votre opinion sur c

01-04-2020 20:11

Mirek Gryc

Hello allIs this situation normal?I do not know th

02-04-2020 20:24

Garcia Susana

Hola, Ascomas inmersos en la corteza de una rama

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Diatrype ?
Mirek Gryc, 28-01-2020 08:49
A few days ago I found on the branch Quercus, Tremella moriformis. Basically fruiting bodies immature and I could not find spores but other characteristics show that this is the species.
As you know, Tremella are parasitic species. And that's what I have a problem with. I would like to determine on which mushroom it parasites, but my knowledge about them is in this case insufficient :(
I was looking among Diatrype. However, the spores do not match any of the species. In fact, 99% of spores have a length slightly below 5µm and their width does not exceed 1µm.
In the picture only a few examples of measurements but in fact I measured a much larger number of spores.
Is it possible that I measure immature spores. I took a sample from the sporocarps or maybe you need to print spores ???
I was not able to observe the reaction to iodine. I tried directly in Lugol and after previous treatment with a KOH sample. In both cases negative.
Thank you in advance for any hints

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Alain GARDIENNET, 28-01-2020 09:24
Re : Diatrype ?

Hi Mirek,

Asci seem multispored. Please see within Diatrypella genus, especially compare to D. quercina.


Mirek Gryc, 28-01-2020 09:46
Re : Diatrype ?
Hi Alain
Oh yes, asci are multispored :)

- so there will be Diatrypella!

Still wondering about the small size of the spores?

Later I will try to calibrate the measurements again, maybe something has changed in the settings?

Thank you and best regards
Mirek Gryc, 28-01-2020 09:48
Re : Diatrype ?
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Eduard Osieck, 28-01-2020 10:16
Re : Diatrype ?
Yes, obviously Diatrypella but the most likely on Quercus D. quercina has often more curved spores which are much larger: 8-12 micron. It could be D. intermedia with spores only 3-5 micron. But see Vasilyeva et al. 1996 (link see www.verspreidingsatlas/0593020 > tab “artikelen (3)” on the right). This species is according to these authors not very well documented.
Alain GARDIENNET, 28-01-2020 11:12
Re : Diatrype ?

Yes, Eduard, you're right. I haven't precisely searched.


Mirek Gryc, 28-01-2020 15:57
Re : Diatrype ?
Thank you both for your help!
However, with my little knowledge about these mushrooms species I can not determine. None of the species described match my.
Diatrypella intermedia should have short asci. In my asci they are long so it's probably also not this species?
I am also posting a photo with the samples of dimensions.
Judge for yourself.

I will try to get other samples from Quercus. After the storm in 2016, a lot of substrate remained in the forest. Until now, old Quercus have remained broken in the forest.

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Mirek Gryc, 30-03-2020 18:04
Re : Diatrype ?

Keeping in mind this thread, yesterday I downloaded a piece of oak tree with Diatrypella fruiting bodies.
Microscopic features identical to those in the collection presented above. Therefore, I ask myself if I did everything right. All features match except ascus length. Or maybe I'm measuring wrong? Do we measure the total length of ascus at Diatrypella? I met in some descriptions where the length of the base is given separately. Are we therefore only measuring the part containing the spores?
If so, these collections would match D. intermedia!
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Eduard Osieck, 03-04-2020 22:23
Re : Diatrype ?
The length of asci with long stipes are often given “p. sp.” which means that the length refers to the (wide) part with the spores. That makes sense because such long stipes are often broken and seldom complete.