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05-11-2025 11:33

Pierre Repellin

Bonjpur,J'ai trouvé, sur une hampe florale d'Alli

04-11-2025 09:07

Josep Torres Josep Torres

Hello.A suspected Hymenoscyphus sprouting on a thi

04-11-2025 12:43

Edvin Johannesen Edvin Johannesen

Hi! One more found on old Populus tremula log in O

04-11-2025 14:53

Josep Torres Josep Torres

Hello.Very small, globose, mucronate perithecia, b

03-11-2025 21:34

Edvin Johannesen Edvin Johannesen

These tiny (0.4-0.5 mm diam.), whitish, short-stip

03-11-2025 19:41

David Chapados David Chapados

Hi,Does anyone knows which genus could this be? G

28-10-2025 15:37

Carl Farmer

I'd be grateful for any suggestions for this strik

03-11-2025 16:30

Hans-Otto Baral Hans-Otto Baral

Hello I want to ask you if you have found this ye

01-11-2025 09:14

Francis Maggi

Bonjour,Trouvé sur Xanthoria parietina à Valdebl

28-10-2025 19:33

Nicolas Suberbielle Nicolas Suberbielle

Bonjour à tous,Je voudrais votre avis sur cette r

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Stictis
Bometon Javier, 16-12-2013 21:16
Bometon JavierEn madera de Quercus.

Tamaño 0,5 mm

Ascas 50-60 um IKI-

Esporas de 35-48 X 4-5um, con 7- 9 septos

Parafisis filiformes y ramificadas, no azulean con IKi

Alguna idea?

Gracias y saludos
Javier
  • message #26275
  • message #26275
  • message #26275
  • message #26275
Daniel Ghyselinck, 16-12-2013 21:32
Re : Stictis
Bonjour Javier,

Regarde du côté de Cryptodiscus rhopaloides, il me semble que la microscopie correspond assez bien. C'est une espèce assez commune sur écorce de feuillus. Les spores sont un peu grandes, mais j'ai aussi des récoltes avec des spores jusque 47 µm.

Amitiés,
Daniel
Martin Bemmann, 16-12-2013 21:35
Martin Bemmann
Re : Stictis
Hi Javier,

with these clavate spores (fig. 3) consider Cryptodiscus.

Regards
Martin

Update: Daniel seems to have the same thoughts. But I must admit that Zotto (in a circulating paper) excluded Cryptodiscus rhopaloides from this genus in his comments on Breitenbach&Kränzlin 1984, as well Baloch et al 2009 did.
Bometon Javier, 16-12-2013 22:41
Bometon Javier
Re : Stictis
Muchsas gracias, Daniel y Martin


Saludos
Javier
Hans-Otto Baral, 16-12-2013 23:04
Hans-Otto Baral
Re : Stictis
Yes, there are two species rather common, rhopaloides and the less common idaei which has narrower spores than rhopaloides. Both are very closely related, and belong in Karstenia. By the way, Lugol provokes a red reaction to the entire hymenium, with a faint blue running ahead. After KOH treatment the hymenium stains deep blue in iodine.

My maximum was actually 50 µm, but with spores strongly clavate and hardly constricted at septa.

C. rhopaloides is also known as Ramonia interjecta, being probably erroneously thought to be a lichen.

Zotto
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Daniel Ghyselinck, 17-12-2013 18:23
Re : Stictis
Thanks for these very precise information (as usual), Zotto.

Daniel
Bometon Javier, 17-12-2013 21:54
Bometon Javier
Re : Stictis
Muchas Gracias Zotto, por tus excelentes explicaciones.

Saludos
Javier