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12-11-2021 00:03

White dots on pine
Lepista Zacarias

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

29-12-2025 23:20

Sordariomycetes
éric ROMERO éric ROMERO

Bonjour, Une récolte du mois d'août 2025 en tou

29-12-2025 17:44

Lamprospora ? laquelle ?
Isabelle Charissou

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

29-12-2025 17:51

En Rosmarinus
Blasco Rafael Blasco Rafael

Hola, me pueden ayudar con esta muestra.Recogida s

29-12-2025 17:12

asco imparfait et oïdium sur tige morte de Polygonatum odoratum
Bernard CLESSE Bernard CLESSE

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

29-12-2025 17:01

Hyphomycete on Rubus fruticosus agg.
Gernot Friebes

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

29-12-2025 08:30

Ascomycete among bryophytes.
Josep Torres Josep Torres

Hello.A tiny ascomycete sprouting under Juniperus

29-12-2025 10:15

Propolis sp. on Pinus sylvestris
Hulda Caroline Holte

Hello, I found and collected this propoloid ascom

29-12-2025 09:38

Phaeohelotium on deciduous wood?
Oskari Virtanen

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

24-12-2025 18:12

Orbilia
Ethan Crenson

Hello all, A friend found this Orbilia growing on

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Otidea tuomikoskii?
Juuso Äikäs, 11-12-2019 23:29
I found these in a Picea abies dominated forest in the middle of October. I measured 15 spores and the results were like this: 11.8-12.8 x 7.7-8.2, Q = 1.5-1.6. A bit larger compared to the info I found on the internet. Still the appearance of the fruitbodies and microscopy looks like it could be O. tuomikoskii and I don't have a better candidate in mind. What do you think?
  • message #60450
  • message #60450
  • message #60450
  • message #60450
Pérez del Amo Carlos Manuel, 12-12-2019 13:27
Pérez del Amo Carlos Manuel
Re : Otidea tuomikoskii?

http://www.ascofrance.fr/search_forum/51266



Saludos,
Carlos
Juuso Äikäs, 12-12-2019 16:47
Re : Otidea tuomikoskii?
Thanks! Seems quite similar to my finding. The spore measurements still cast a doubt for me, especially the width (Q on average 1.5). They are from a fresh spore print in water... maybe that could explain the difference.
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Peter Püwert, 12-12-2019 23:48
Peter Püwert
Re : Otidea tuomikoskii?
Hi, in my opinion isn't O. tuom. The spores size in litt. is 10-11 x 5,5-6,5 by Van VOOREN et al. (2008, 2014, 2015), Carlos 9,5-11 x 5,4-6,7...and I see not different color between outer surface (brownish, distinct furfuraceous) and the hymenial layer (yellowish).

Greetings Peter.
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Andreas Gminder, 13-12-2019 00:12
Andreas Gminder
Re : Otidea tuomikoskii?
Hello,

I second Peter in his opinion that this is not O. tuomikoskii (neither O. papillata which is nearly undistinguishable IMO). Your Otidea seems to have a smooth outer surface and seems to grow single, whereas O. tuomikoskii mostly grows in group and often fasciculate. The shape doesn't suite too well and the unicoloured aopthecia don't look right either, as Peter already mentioned.

all the best,
Andreas
Viktorie Halasu, 14-12-2019 00:07
Viktorie Halasu
Re : Otidea tuomikoskii?
Hello,
did you check the chemical reactions of surface exudates with Melzer + reaction of both exudates and the whole section in KOH? In O. tuomikoskii the whole excipulum turns yellowish in KOH. In the rest of small-spored species the surface exudates (incrustations on surface hyphae) have different reaction in Melzer, changing slowly (in a minute or two) to rounded drops in some species or negative in other. 
Viktorie
Juuso Äikäs, 15-12-2019 15:43
Re : Otidea tuomikoskii?
Thanks for the comments. I didn't check the chemical reactions, but that's good to know. Maybe this is just a boring old O. leporina.