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02-07-2025 09:32

Nicolas VAN VOOREN Nicolas VAN VOOREN

Hello, bonjour.Here is the paper I'm searching for

30-06-2025 16:56

Lydia Koelmans

Please can anyone tell me the species name of the

01-07-2025 23:37

Josep Torres Josep Torres

Hello.A Pleosporal symbiotic organism located and

30-06-2025 12:09

Edvin Johannesen Edvin Johannesen

This tiny, rather "rough" erumpent asco was found

30-06-2025 06:57

Ethan Crenson

Hi all, Another find by a friend yesterday in Bro

30-06-2025 19:05

ALAIN BOUVIER

Bonjour à toutes et à tousJe cherche à lire l'a

30-06-2025 14:45

Götz Palfner Götz Palfner

This is a quite common species on Nothofagus wood

25-06-2025 16:56

Philippe PELLICIER

Bonjour, pensez-vous que S. ceijpii soit le nom co

29-06-2025 18:11

Ethan Crenson

Hello all, A friend found this disco yesterday in

28-06-2025 17:10

Peter Welt Peter Welt

I'm looking for: RANALLI, M.E., GAMUNDÍ, I.J. 19

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Pezicula-like on Hedera
Martin Bemmann, 03-06-2013 21:18
Martin BemmannDear all,

yesterday I found these tiny ascomata (~0.2 mm in dm.) on a dead Hedera helix climbing a tree but cut at the bottom a considerable time ago. It was easy to pull down and the fruitbodies were found at the upper tips of the plant from a height of ca. 5 m above ground.
None of the asci showed its normal spore contents but most of them were filled by a granulose to globulose contents (microconidia?). The IKI-reaction of the apical apparatus was faint red (hemiamyloid). Nevertheless some allantoid spores could be observed floating in the medium. Some of them germinating, some of them one-septate.
My first thought was on Pezicula, but spores are way to small, (8.8)9.3-12.5x3.2-4 µm, and I found no species recorded on Hedera (Verkley).

Anyone with an idea?

Best regards

Martin
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Stip Helleman, 04-06-2013 07:55
Stip Helleman
Re : Pezicula-like on Hedera
Hallo Martin,
the texture of the fruitbodies looks macroscopically not like Pezicula to me, did you consider Claussenomyces ? C. prasinulus has 3 septate spores at (over)maturity and also forms conidiospores.

Best wishes,
Stip
Stip Helleman, 04-06-2013 19:11
Stip Helleman
Re : Pezicula-like on Hedera
Hallo Martin,
Laetinaevia is another idea.

Stip
Martin Bemmann, 04-06-2013 19:18
Martin Bemmann
Re : Pezicula-like on Hedera
Hi Stip,

this is what I wanted to suggest next! You are right with your doubts with Pezicula, but the cushion-shaped apothecia of Claussenomyces prasinulus do not fit either.
I was looking since then after members of the Naevioideae and still I am.
I will try to access Hein's work of 1976 and study this. Maybe it brings me ahead...

Best regards

Martin
Stip Helleman, 04-06-2013 20:42
Stip Helleman
Re : Pezicula-like on Hedera
Hallo Martin,
I will send you Hein 1976 in a minute

Herzlich,
Stip
Martin Bemmann, 04-06-2013 21:12
Martin Bemmann
Re : Pezicula-like on Hedera
Thank you very much, Stip!
But the plate on p. 25 is disillusioning! My fungus is neither errumpent nor sessile but shortly stipitate.
First I will try to do a section (a hard task with this tiny ascomata) before I proceed.

Best regards

Martin
Martin Bemmann, 09-06-2013 19:59
Martin Bemmann
Re : Pezicula-like on Hedera
Hi Stip,

Laetinaevia is a good path to proceed although there are only few fruiting on woody substrates (none on Hedera yet).
I did not manage to make a section but I did a slide with Brilliant Cresyl Blue that shows spores inside the asci. I believe that these spores are germinating inside the asci while being one-septate.
I hope Zotto has something in his database that will match or help.

Best regards

Martin
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Stip Helleman, 10-06-2013 00:33
Stip Helleman
Re : Pezicula-like on Hedera
Hi Martin,
your collection did remind me a bit of L uvidula but yours seems to have a different spore L/W ratio. For the right picture I think there are germinating spores too. It is a pity I don't know DBASE 4.

Stip?

Hans-Otto Baral, 10-06-2013 22:52
Hans-Otto Baral
Re : Pezicula-like on Hedera
Hi Martin

I have presently no idea at present. L. uvidula is IKI-. A Parorbiliopsis perhaps? Would it be possible to male a section of the excipulum?

Zotto
Martin Bemmann, 11-06-2013 21:46
Martin Bemmann
Re : Pezicula-like on Hedera
Hi Zotto,

no, I did not manage a section yet. The remaining apos are too tiny and they fruit on loose bark (very uncomfortable to cut). Some new apos are growing now in the moist bag. I revisited the locus and collected some meters of the Hedera and inspected them under the dissecting microscope. But I did not find further colonies.

Regards

Martin