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04-08-2009 10:49

Martin Bemmann Martin Bemmann

Dear all, my colleague Ditte found this small b

03-08-2009 23:14

Patrice TANCHAUD

Sur bois en zone humide. Apothécie 1,5 mm maxi.

01-08-2009 21:25

Beñat Jeannerot Beñat Jeannerot

Bonsoir à tous, Décidément, aujourd'hui je n

01-08-2009 21:21

Beñat Jeannerot Beñat Jeannerot

Bonsoir à tous, Bon, normalement, je ne ramass

31-07-2009 23:36

Hans-Otto Baral Hans-Otto Baral

Hi Guy sent me images of an interesting pyreno w

31-07-2009 18:26

Beñat Jeannerot Beñat Jeannerot

Bonjour à tous, Je vous présente une récolte

29-07-2009 23:37

Alain GARDIENNET Alain GARDIENNET

Bonsoir, J'ai fait ce soir juste avant la nuit (

29-07-2009 23:04

Nicolas VAN VOOREN Nicolas VAN VOOREN

Bonsoir. Je pense avoir récolté Pezoloma kathia

29-07-2009 15:48

Hans-Otto Baral Hans-Otto Baral

Here is a very sparse find of a minute ?Lasionectr

28-07-2009 23:56

Hans-Otto Baral Hans-Otto Baral

Peter Tobies asked me about this Hypocreaceae whic

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Marcelleina?
Martin Bemmann, 04-08-2009 10:49
Martin BemmannDear all,

my colleague Ditte found this small broken cup on bare soil on a shady slope. After going through Boudier's plates and consulting the article of Moravec (Mycotoxon 30, 1987, 473-499) we came into consent that this could be a Marcelleina (brevicostatispora?).
Can this be confirmed?

Best regards,
Martin
  • message #8657
Martin Bemmann, 04-08-2009 10:53
Martin Bemmann
Re:Marcelleina?
another view:
  • message #8658
Martin Bemmann, 04-08-2009 10:54
Martin Bemmann
Re:Marcelleina?
Ascospores (there were no free ones):
  • message #8659
Martin Bemmann, 04-08-2009 10:54
Martin Bemmann
Re:Marcelleina?
And paraphyses:
  • message #8660
Pascal RIBOLLET, 04-08-2009 13:27
Re:Marcelleina?
Why not Scabropezia sp.? The resemblance is striking (greenish shade of apothecia, external surface strongly warted). I find S. scabrosa in western France (Loire Atlantique) on the river banks, it looks exactly like that. It could also be S. flavovirens...
The spores could fit with the genus Scabropezia too.
Are the asci IKI+ ? This is the case for Scabropezia (Pezizaceae) but not Marcelleina (Pyronemataceae).

Best regards
Pascal Ribollet
Martin Bemmann, 04-08-2009 21:26
Martin Bemmann
Re:Marcelleina?
Hi Pascal,

yes quite convincing! We didn't know this genus, yet.
I forwarded to her to do this IKI-job.

Regards, Martin
Martin Bemmann, 05-08-2009 21:53
Martin Bemmann
Re:Marcelleina?
Hi Pascal,

Ditte gave me some leftover crumbles of this cup and left the "IKI-job" for me ;-)
Well, I did a new preparation showing you in the next pictures the asci with spores, paraphyses, that are filiforme and not clavate (as in Saccardo's diagnosis of Phaeopezia scabrosa) and the positive reaction of the asci in IKI, especially good visible at immature asci.
We owe you the measurements of the spores as well. I didn't find any free ones, as Ditte didn't. But those developed ones inside the asci measured 14,1-15,4 µm (perfect for P. scabrosa).
Now I have a problem with my data: spore size is OK but shape of the paraphyses not. Saccardos P. atro-spora has filiforme paraphyses but much larger spores (18-20 µm).
I don't have any more recent description of this genus at hand.
Can you help?

Best regards,
Martin
  • message #8691
Martin Bemmann, 05-08-2009 21:53
Martin Bemmann
Re:Marcelleina?
Paraphyses:
  • message #8692
Martin Bemmann, 05-08-2009 21:54
Martin Bemmann
Re:Marcelleina?
IKI-reaction:
  • message #8693
Martin Bemmann, 05-08-2009 21:55
Martin Bemmann
Re:Marcelleina?
IKI-reaction of single asci:
  • message #8694
Pascal RIBOLLET, 07-08-2009 13:49
Re:Marcelleina?
Hi Martin,
So it seems that Scabropezia is confirmed.

I know few reference about that species :
- Bull. de la Fédération Myc. et Bot. du Dauphiné-Savoie 183 p.11-24
- Nordic Macromycetes vol. 1 p.66
- Danish keys at the Mycokey site (open the big key "Asconoegle.pdf", pages 45 and 47).
That's all I have.

My personal data : spores 13,5-15 µm diameter, without ornementations (truncate warts 1-1,5 µm).
But just as you, I did not find perfectly mature spores. Perhaps that can explain the difference with Saccardo's measures (18-20 µ...ornemenation included ?).

On you first picture, the warts seems to be a bit lower than in my collection (see attached picture)...Anyway I suppose that your find could be S.scabrosa and not flavovirens, because of the coarse warts and the lack of yellowish tinge (according to danish key).

Martin, did you see any latex seeping out of the apothecia ? It is the case for my collection, but I can't find it mentionned in the literature.

Best regards
Pascal
  • message #8704
Martin Bemmann, 07-08-2009 16:03
Martin Bemmann
Scabropezia!
Hi Pascal,
Yes, Scabropezia! And thanks for the references! We should add the original article of Dissing/Pfister, Scabropezia, a new genus of Pezizaceae (Pezizales), Nordic Journal of Botany 1, 1981, 102-108. Sadly I have no access to this article since my university library has no e-abonnement of this journal.
Saccardo gives these large measurings not for P. scabrosa (15 µm), but for P. atro-spora. The Danish key of Westerholt/Petersen gives 14-15,5 µm. This fits all very well. To decide whether the warts are coarse or not, one has to see both possibilities which I didn't. By the way, you don't have a picture of the paraphyses of your find, by chance?
This latex drops were absent at Dittes find. Are you sure it is oozing out from the hymenium or could it be an external contamination? Did you look into it with the microscope?

All the best,

Martin
Pascal RIBOLLET, 07-08-2009 16:34
Re:Marcelleina?
Thanks for the reference of Nordic Journal of Botany. But I also have no access...

Quite sure for the latex ! in my picture it comes from lancet strokes in the hymenium, photo taken about 2 minuts later.

Cheers
Pascal
Martin Bemmann, 07-08-2009 21:14
Martin Bemmann
Re:Marcelleina?
Hi Pascal,

a friend of mine, currently in the US, will send me the Nordic paper in the next days. I will share it with you. How about paraphyses? ;-)

Cheers,
Martin
Martin Bemmann, 11-08-2009 08:55
Martin Bemmann
Scabropezia flavovirens
Hi,

today I could look into the article by Dissing/Pfister 1981. I am sure the ornamentation of the spores is that of S. flavovirens. S.scabrosa has 1.2-1.8 µm high capitate(!) warts, irregularly outlined.

Best regards, Martin
Pascal RIBOLLET, 12-08-2009 09:28
Re:Marcelleina?
I checked the paraphyses of my collection : they have the same shape as in yours.
250-300 x 8-9 (10) µm, 3-4 septa, roughly straight, not forked, not or slightly (and progressively) enlarged at the tip.

All the best
Pascal
François Valade, 23-08-2009 21:18
François Valade
Re:Marcelleina?
Hallo Martin, salut Pascal
I am just back from holidays and see your request. I have this paper in pdf. If you don't alreadt got it, I can send it now. File is about 3 Mb.
François
Pascal RIBOLLET, 26-08-2009 14:58
Re:Marcelleina?
Salut François,
Désolé je réagis un peu tard...Merci pour ta proposition mais ça y est, c'est ok.

Amitiés
Pascal