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29-12-2025 17:44

Isabelle Charissou

Bonjour,J'aimerais savoir si d'autres personnes au

29-12-2025 17:51

Blasco Rafael Blasco Rafael

Hola, me pueden ayudar con esta muestra.Recogida s

29-12-2025 17:12

Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous m'aider à

12-11-2021 00:03

Lepista Zacarias

Hi everybody,A week ago in my fiels trip I noticed

29-12-2025 17:01

Gernot Friebes

Hi,I'm looking for help with this hyphomycete with

29-12-2025 08:30

Josep Torres Josep Torres

Hello.A tiny ascomycete sprouting under Juniperus

29-12-2025 10:15

Hulda Caroline Holte

Hello, I found and collected this propoloid ascom

29-12-2025 09:38

Oskari Virtanen

Hi,could anyone help me identify this, I suspect P

24-12-2025 18:12

Ethan Crenson

Hello all, A friend found this Orbilia growing on

28-12-2025 12:08

Margot en Geert Vullings

This possible Karstenia was found on the bark of d

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?Eutypella on Alnus
Juuso Äikäs, 20-11-2023 15:49
A couple days ago I found some black stromata growing on thin branches attached to a fallen Alnus tree. There appears to be some yellow pigment inside the stromata.

The asci are pedicellate and 8-spored, IKI negative. 

Spore measurements:

5.5 - 7.3 × 1.8 - 2.2 µm, Q = 2.6 - 4.2 ; Avg = 6.4 × 2.0 µm, Qav = 3.2 ; N = 10

I was thinking of Eutypella cerviculata, which I believe at least mostly grows on Alnus. However, these fruitbodies don't have the long necks as seen in many photos. Rather, they are just short stubs. Also, not sure about the yellow pigment.

Any idea what this is?
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Viktorie Halasu, 20-11-2023 23:19
Viktorie Halasu
Re : ?Eutypella on Alnus
Hello,
perhaps Eutypa flavovirens? 
Viktorie 

Juuso Äikäs, 21-11-2023 16:20
Re : ?Eutypella on Alnus
Yes, this sounds like a good suggestion. The inside of the fruitbodies looked greenish yellow in situ ("flavovirens"). Thank you!