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14-04-2025 15:11

Need help with 6 coprophilous species
Lennert Gees

Greetings!For my master's dissertation I work on c

27-04-2025 15:54

literature search
Martin Bemmann Martin Bemmann

Can somebody provide this article from a Leningrad

26-04-2025 16:01

Michel Delpont
Jacques Fournier Jacques Fournier

J'ai le regret d'informer les membres du forum qui

26-04-2025 07:15

Paranectria?
Dragiša Savic

Hello everyone,the lichen is Candelariella aurella

26-04-2025 19:32

Arachnopeziza sp.
Francois Guay Francois Guay

I found these small Arachnopeziza sp. growing on d

25-04-2025 22:48

Hilberina from Japan
Gustaf Fredell Gustaf Fredell

Hello,I hope everything is going well. I couple mo

18-04-2025 23:16

Mollisia
Robin Pétermann Robin Pétermann

Bonjour, Voici une probable Mollisia, genre que j

24-04-2025 21:35

Asco on Salix leaf
Thorben Hülsewig

Hi there,last week i could found this asco on an S

25-04-2025 17:24

Cosmospora/Dialonectria spec.
Stefan Blaser

Hi everybody, This collection was collected by JÃ

25-04-2025 09:33

Help with a Pyrenomycete.
Josep Torres Josep Torres

Ascomata shaped like deformed black grains, measur

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Rutstroemia sp. Nov '21
Nihad Omerovic, 11-11-2021 23:06
Hello
Looking for opinions on this Rutstroemia.
Collection date 16. Oct, on a twig, possibly of Alnus.
Spores measurement:
22.2 - 24.1 × 8.4 - 9.4 µm
Q = 2.4 - 2.8 ; N = 19
Me = 23.1 × 8.9 µm ; Qe = 2.6

The spores have reddish color.

Nihad Omerovic, 11-11-2021 23:10
Re : Rutstroemia sp. Nov '21
Spores
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  • message #70635
Nihad Omerovic, 11-11-2021 23:14
Re : Rutstroemia sp. Nov '21
Section
Hans-Otto Baral, 12-11-2021 11:43
Hans-Otto Baral
Re : Rutstroemia sp. Nov '21
This requires a closeup of the ectal excipulum. Is there a gelatinous layer?

You should compare R. alnobetulae.

Which altitude does it come?
Nihad Omerovic, 12-11-2021 13:12
Re : Rutstroemia sp. Nov '21
I am afraid I don't have much better photo of the excipulum.

I did compare it with R. alnobetulae but it didn't fit, as per R. Dougoud paper:

spores are wider (Q=2,6 while in R. alnobetulae Q=4), no mentioning of this spores reddish coloration and paraphyses are inamyloid.

Altitude is 500 m.
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Hans-Otto Baral, 12-11-2021 13:18
Hans-Otto Baral
Re : Rutstroemia sp. Nov '21
Yes, the strange blue IKI reaction of the VBs in the paraphyses! And your spores are much too wide.

But I now see that R. alni (17-24 x 7-9) would come close to your data.

I think Rutstroemia is rather host specific, so the substrate should be clarified by wood anatomy.
Nihad Omerovic, 12-11-2021 13:31
Re : Rutstroemia sp. Nov '21
I have this cross section, I don't know if it is of any help.
Is the spore coloration of any significance, do you think?

I also collected What I IDed as R. alni the other day and compare it and it seemed different, excipulum, spores...
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