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16-06-2013 16:39

Maren Kamke Maren Kamke

Hello everybody,I found an ascomycete (0,1 mm) on

30-05-2013 09:46

Alain BRISSARD

Bonjour à tousPouvez-vous me confirmer ou m'infir

30-05-2013 20:08

M. M. Gotink

A fews days ago I found this Pezizella on dead pet

03-06-2013 01:35

Esquivel-Rios Eduardo

Saludos.Recientemente encontramos este especimen q

15-06-2013 19:57

Lieve Deceuninck Lieve Deceuninck

Dear ForumBonjour Forum Literature request : Myco

15-06-2013 16:48

Gilles Corriol Gilles Corriol

J'aimerais une petite confirmation pour cette dét

15-06-2013 17:08

Gilles Corriol Gilles Corriol

Bonjour, Est-ce que cette détermination est corre

25-05-2013 13:55

Gilles Corriol Gilles Corriol

Sur crotte de petit mamifère, avec Trichobolus zu

15-06-2013 15:18

Gilles Corriol Gilles Corriol

Bonjour,Une récolte à la base de tige mortes de

15-06-2013 16:21

Gilles Corriol Gilles Corriol

Un autre Ophiobolus, cette fois sur Echium vulgare

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Asco on Arnica
Maren Kamke, 16-06-2013 16:39
Maren KamkeHello everybody,
I found an ascomycete (0,1 mm) on arnica.
Spores (11-13) 11,72 x 3,88 (3-4,5) µm, with two bigger oildrops and many small ones on both ends.
Asci 48-50 x 9-11, IKI blue, paraphyses 3 µm.
Thanks
Regards
Maren
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Hans-Otto Baral, 16-06-2013 17:25
Hans-Otto Baral
Re : Asco on Arnica
Hi Maren

you made no mistake with 0.1 mm? And it was in the mountains? On the old stems?

No idea actually. I looked in my database for Asteraceae with such a spore size, no good result.

Something of the Naevioideae perhaps. Schizothyrioma has larger apos and is reported on Achillea.

Zotto
Maren Kamke, 16-06-2013 23:15
Maren Kamke
Re : Asco on Arnica
Hi Zotto,
thank you for your opinion.
There is an artifical arnica meadow on the westcoast of Schleswig-Holstein, we accompanied the botanical sektion to this spot to look after ascomycetes on arnica. What we didn't knew was that the meadow is mowed regularly and the clippings are removed. So we searched for arnica-stems. The botanist I talked to identified my stem as arnica, but it is not impossible that he was wrong.
On the same stem I found Cyathicula tomentosa,  Mollisia cf. revincta (still without spores :( and Leptospora rubella.

The apos are really very small, max up to 0,15 mm.
I checked with the Naevioideae? on your DVD, the color and the macroscopical habitus matches Ploettnera solidaginis, but the microscopical details of course not.
The spores get one septa with age.
I think it could be a Diplonaevia sp. but which one?


Regards Maren

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Hans-Otto Baral, 17-06-2013 06:56
Hans-Otto Baral
Re : Asco on Arnica
Ploettnera is not a bad idea, but it has a special type of apical ring (only the lower part of the wall reactive). Diplonaevia has a strongly protruding margin, which is to some extent also the case in your specimen. A Pyrenopeziza would be an alternative genus for your fungus, though such wide spores are unusual.

Arnica is not in the list of substrates in Hein 1976.

Zotto