Accès membres

Mot de passe perdu? S'inscrire

22-04-2026 01:06

Neonectria ou thelonectria ?
Richard VALERI Richard VALERI

Bonjour à tous.Je vous présente cette Nectria s.

21-04-2026 22:14

Peziza depressa?
Margot en Geert Vullings

This cup fungus was found on April 10, 2026, on lo

21-04-2026 21:00

Hymenoscyphus sp
Sylvie Le Goff

Bonjour à tousJe sollicite votre aide pour cet as

21-04-2026 13:36

Wentiomyces-like on Salix
Gernot Friebes

Hi,I am out of ideas for this one. I collected Sal

21-04-2026 13:19

Lophodermium on Typha
Gernot Friebes

Hi,this Lophodermium on Typha has ascospores measu

21-04-2026 13:05

Hyphomycete on Typha
Gernot Friebes

Hi,this hyphomycete feels familiar but I was not a

20-04-2026 22:00

Trichobolus dextrinoideosetosus?
Malcolm Greaves Malcolm Greaves

These pale yellow, hairy ascos were growing on cul

19-04-2026 21:23

Hairy anamorph on plywood with beaked curved conidia
Steve Clements

Bonjour, I found this anamorphic fungus on old pl

19-04-2026 20:46

Anamorphic fungus on plywood
Steve Clements

1 mm diameter approx spherical conidiophores on pl

12-04-2026 17:56

Seeking genus for 1 – 3 septate spored asco. on herb Nepteta cataria (Mint).
Hardware Tony Hardware Tony

Found on dead stems in February earlier this year

« < 1 2 3 4 5 > »
Ciborinia en aulnaie à ail des ours
Bernard CLESSE, 05-06-2015 19:24
Bernard CLESSEBonsoir à tous,

Pouvez-vous me donner une piste pour ce Ciborinia greffé sur sclérote noir en forme de banane, trouvé en aulnaie à ail des ours dans un mélange de matière organique (feuilles) pourrissantes et terre mêlée ? 

a) asques IKI+
b) spores étroitement ellipsoïdes à ovales : 9-12,5x2,5-4,5
c) certaines spores présentent une enveloppe hyaline qui se détache (cf. spore1) 
d) paraphyses filiformes, septées, certaines flexueuses au sommet
e) excipulum à textura globularis 

Bernard
  • message #36345
  • message #36345
  • message #36345
  • message #36345
Lothar Krieglsteiner, 05-06-2015 20:37
Lothar Krieglsteiner
Re : Ciborinia en aulnaie à ail des ours

Hi Bernard,


can you tell us how many spores are in the asci? In your picture I see 4, but the foto maybe shows not the whole ascus. 


Regards from Lothar

Hans-Otto Baral, 05-06-2015 20:52
Hans-Otto Baral
Re : Ciborinia en aulnaie à ail des ours
tres characteristique especes! The banana-shape, long and thin stipe, and occurrence in Alnetum leave no doubt about what Lothar surely also thoght: Sclerotinia capillipes.

This is usually 4-spored but 8-spored apothecia also occur. Uwe Lindemann wrote an article on it for which I also supplied data. here attached.

Zotto
Lothar Krieglsteiner, 05-06-2015 20:55
Lothar Krieglsteiner
Re : Ciborinia en aulnaie à ail des ours
yes, Zotto, you are right - I also thought of Sclerotinia capillipes :-)
Bernard CLESSE, 05-06-2015 21:00
Bernard CLESSE
Re : Ciborinia en aulnaie à ail des ours
Big thank you to Patrice Tanchaud (who offered me the name of species) as well as Lothar and Zotto for your confirmations and documentation on this Sclerotinia !

I'll check the number of spores per ascus in 30 minutes.

Bernard

Hans-Otto Baral, 05-06-2015 21:22
Hans-Otto Baral
Re : Ciborinia en aulnaie à ail des ours
The genus Ciborinia is surely better for this species because of tracheids in the sclerotial medulla, but that genus is today questioned again....
Bernard CLESSE, 05-06-2015 22:41
Bernard CLESSE
Re : Ciborinia en aulnaie à ail des ours
Good evening all,

I redid one preparation and I have predominantly observed 4spored-asci but sometimes with 3, 5, 6 or 8 spores !


Here are some more pictures of spores and paraphyses. Paraphyses are slightly swollen at the top and the spores are finally : 6-13x2,5-4,5

Bernard 

  • message #36353
  • message #36353
Hans-Otto Baral, 06-06-2015 08:46
Hans-Otto Baral
Re : Ciborinia en aulnaie à ail des ours
Thanks! The interesting thing is that the spores are binucleate in 4-spored asci, because there are no aborted spores. This seems to mean that the 8 nuclei are going as pairs in the spores. In 8.spored asci the spores should then be uninucleate. This is unusual because in some other species of Sclerotiniaceae 4 spores abort early and are then much smaller than the other four.

Nuclei are difficult to see. usually staining with IKI helps.
Bernard CLESSE, 06-06-2015 08:52
Bernard CLESSE
Re : Ciborinia en aulnaie à ail des ours
OK Zotto, great thanks for this information.

Bernard