Niesslia? - Forum ASCOFrance

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Niesslia?

Garcia Susana, 10-06-2013 21:11

Hello:

Pyrenomicete found that I can not identify

data:
Superficial pseudothecia. Size 140-175um in diameter
Host: leaves, probably Cornus sp
Hairs: 45-145 x 4 - 5um. Enlarged at the base (x10 - 13um). Thick wall, 2um. Pointed, not septate.
Asci and spores: data on the images

Consulting the bibliography I think it might be the genre Niesslia. But I have no information of the genre.
Could it be? Thanks in advance

A greeting

Susana
Navarra - Spain?

Björn Wergen, 15-06-2013 02:07

Re : Niesslia?

Hi Susana,

interesting finding. Niesslia species do not have apical structures staining red in Congo. This is hint for a member of Diaporthales (and several smaller groups, like Annulatascaceae). But for now I don't know a species with this features.

regards,
björn

Garcia Susana, 17-06-2013 08:16

Re : Niesslia?

Hi Böjrn:

Thanks for your specification, I will try looking in the direction that you indicate.

Regards
Susana

Christian Lechat, 17-06-2013 10:15

Re : Niesslia?

Dear all,
I think this fungus is not Diaporthales because in this order, the asci are free in the centrum.
The genus Niesslia seems fit with Susana's collection. It would be useful to see a photo of ascomata on the substratum and asci observed in water.

Regards,
Christian

Garcia Susana, 17-06-2013 12:47

Re : Niesslia?

Hello
I send some pictures of the species on the substrate and asci observed in water.
I do not see paraphyses.

Regards
Susana

Walter Gams, 01-07-2013 09:14

Re : Niesslia?

Dear Susana,
Niesslia has quite superficial perithecia (not pseudothecia), which tend to collapse disc-like on drying. I do not think you have a Niesslia. Otherwise I would be very pleased to see it, because I am just trying to revise this large genus.
Best wishes Walter Gams

Garcia Susana, 02-07-2013 11:35

Re : Niesslia?

Hi Walter:
Perithecia I found were superficial and loosely adherent to the substrate. Finally I believe that they could be of Niesslia ilicifolia.
I collect four perithecia, 2, I use for my observations, the other two I store. If you have interest in them I can send you the sample. Send me your address at private.
A greeting

Susana

Walter Gams, 02-07-2013 17:45

Re : Niesslia?

Dear Susana, My address is Molenweg 15, NL-3743 CK Baarn, Netherlands.
I look forward to examining your material and possibly getting a pure culture.
Best regards Walter

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