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21-12-2025 12:34

Nectria ??
Castillo Joseba Castillo Joseba

me mandan el material seco de Galicia (España) 

20-12-2025 23:08

Malvipezia pauli !
Patrice TANCHAUD

Bonsoir, récolte sur sol sablonneux dans l'arriÃ

21-12-2025 09:32

Spherical Pyrenomycete
Josep Torres Josep Torres

Hello.A tiny ascomycete found embedded in wood in

21-12-2025 01:54

Ophiostoma
David Chapados David Chapados

Hi,Would it be possible to find the species with t

20-12-2025 15:47

Greenish asco on pine?
Mirek Gryc

Hi.These grew on pine wood that was heavily covere

20-12-2025 10:49

Small resin asco?
Mirek Gryc

Hi. „I doubt it is possible to identify this ti

18-12-2025 21:17

Two collections of yellowish discs on bare ground
Pol Debaenst

The identification took me to Byssonectria deformi

15-12-2025 07:09

indet. Rutstroemiaceae sp. on unk. fallen leaves
Danny Newman Danny Newman

indet. Rutstroemiaceae sp. on unk. fallen leavesMc

19-12-2025 10:10

Peziza vers varia ?
Patrice TANCHAUD

Bonjour, récolte réalisée en milieu dunaire, a

18-12-2025 17:23

Polydesmia fructicola ?
Bruno Coué Bruno Coué

Bonjour,je serais heureux d'avoir votre avis sur c

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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
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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 

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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