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10-11-2024 17:09

Malcolm  Greaves Malcolm Greaves

This Geoglossum has 7 septate spores 75-90 long. T

12-11-2024 16:43

Ethan Crenson

Hello all, This weekend a friend found these dark

11-11-2024 23:17

B Shelbourne B Shelbourne

• Macro and habitat suggest Hyaloscyphaceae s.l.

09-11-2024 16:41

Stephen Mifsud Stephen Mifsud

Hello everyone, we have recently published a paper

11-11-2024 14:05

Edouard Evangelisti Edouard Evangelisti

Bonjour le forum, Je sollicite votre avis concern

10-11-2024 19:47

B Shelbourne B Shelbourne

• Macro and habitat suggest Phaeohelotium, confi

08-11-2024 17:36

Juuso Äikäs

Recently I posted here my finding of small white a

04-11-2024 17:32

Yves Antoinette

Bonjour, je pense qu'il peut s'agir de Trichoderma

08-11-2024 16:54

David Chapados David Chapados

Hi, I'm looking for help to identify this specime

08-11-2024 15:44

Laurent LENEL Laurent LENEL

Bonjour à tous, ma découverte du jour, une Helve

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Dark red discomycete on Betula - nematode trapping anamorph?
Ethan Crenson, 12-11-2024 16:43
Hello all,

This weekend a friend found these dark red cups on the cut end of Betula in the Northeastern US (Maine). In the field they appeared very dark, almost black and associated with a dark staining in the wood. Illuminated in the lab they appear dark red, quite small, the largest reaching about 0.25mm in diameter.

Spores: hyaline, clavate, 10-12.7 x 2.2-2.5µm, with one oil droplet at each end.

Asci: 46-55 x 6-7µm, IKI-

Paraphyses: narrow, usually curved at the ends

Red pigments in the form of an epithecium above the hymenium

An interesting synnematous anamorph that is growing with this disco appears to be trapping nematodes. There is also a black immersed pyrenomycete and another, light colored discomycete growing together with these dark red ascos, so it is possible the synnemata could be associated with either of those.

Does anyone have any ideas about this?

Thank you in advance,

Ethan
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Hans-Otto Baral, 12-11-2024 17:09
Hans-Otto Baral
Re : Dark red discomycete on Betula - nematode trapping anamorph?
Hi Ethan, my god!! This is a new genus and family to which also a very long. and multispored species belongs. It reminded me of Cordieritidaceae but its placement is very special, according to sequences obtained by Adam. The only described species related to them is Claussenomyces tympanoides, which is misplaced there.

Now this specimen should be sequenced I think, since we have two such species with different ITS and slightly different spore size. Would it be possible to send it to Adam? I am sure he would be happy.

You do not have a scale to your photos? I much appreciate that to be able to measure myself.
Ethan Crenson, 12-11-2024 17:37
Re : Dark red discomycete on Betula - nematode trapping anamorph?
Hello Zotto!  Thank you for the information.  That is very exciting!  I would be happy to send a portion of the collection to Adam.  I am drying some apothecia now to attempt a sequence for myself. 

I tested the tissue in KOH and extracted red pigments. It is ionomidotic, I assume. I also made some images of the synnemata.  All posted below.

I will measure and do a more thorough documentation this afternoon.  

Thank you again!
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Hans-Otto Baral, 12-11-2024 17:47
Hans-Otto Baral
Re : Dark red discomycete on Betula - nematode trapping anamorph?
Ah, you want to sequence yourself! That would be sufficient!!

Yes, ionomidotic. The photos are in a new folder starting with 3f in Helotiales.

The anamorph could be Graphium caliciioides?