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23-03-2011 12:15

Alain GARDIENNET Alain GARDIENNET

Bonjour, J'ai fait cette clé (pièce jointe), s

21-03-2011 21:26

Amy Rossman

Dear All, Thank you so much for responding abou

21-03-2011 14:04

Menéndez Juan Luis

Dear all, I know this is a web about ascomycete

21-03-2011 10:25

roland rousseaux

En examinant des rameaux morts d'une haie de Forsy

20-03-2011 22:07

Marja Pennanen

Hello, I found today some 0.1-0,2 mm wide Orbil

20-03-2011 21:27

roland rousseaux

Stromas en mélange sur rameaux morts de Syringa

20-03-2011 19:07

Beñat Jeannerot Beñat Jeannerot

Adio à tous, Un Ascobolus, à mon avis proche

19-03-2011 19:13

roland rousseaux

Périthèces noirs cachés sou l'épiderme qui s'o

19-03-2011 16:49

Martin Bemmann Martin Bemmann

Hi all, yesterday I collected a Vialaea in the

19-03-2011 11:25

Jean Pierre Dechaume Jean Pierre Dechaume

Sur crotte de chevreuil, très petits, 0,3-0,4mm,

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Asco inconnu
Enrique Rubio, 08-04-2009 20:46
Enrique RubioPurrait quelqu'un me donner une opinion sur cet petit asco (0.2-0.3 mm) orange que croit dans les branches mortes de Corylus, sur le bois et sur pyrenos (Diatrype).
Il me montre des asques IKI (-), avec crochets, et les spores sont septées (jusqu'a 7 septa) et germinent a l'interieur des asques. Paraphyses avec carotenoides.
Je ne connais pas le genre
Merci en avancé
Enrique

I'd like to know your opinion about this small asco (0.2-0.3 mm) that grows on Corylus branches, on the wood and on pyrenomycetes (Diatrype) surface. The asci are IKI (-), and they have croziers. The spores are multiseptate (up to 7 cross septa) and germinating inside the living asci. Paraphyses branched with carotenoids. I don't know even the genus to wich belongs.

Many thanks for your help
Enrique
  • message #7410
Enrique Rubio, 08-04-2009 20:49
Enrique Rubio
Re:Asco inconnu
Spores
  • message #7411
Enrique Rubio, 08-04-2009 20:50
Enrique Rubio
Re:Asco inconnu
Asci and paraphyses
  • message #7412
Enrique Rubio, 08-04-2009 20:51
Enrique Rubio
Re:Asco inconnu
Apothecial margin
  • message #7413
Hans-Otto Baral, 08-04-2009 21:47
Hans-Otto Baral
Re:Asco inconnu
Dear Enrique

I know this fungus very well. It is on the DVD under the name Naeviopsis cf., HB 5472a.JPG, but presently I have it in the directory Calloria as unidentified species with 7 septa. I know only a few collections from (sub)mediterranean Spain, but 2 years ago I detected it in my village on a cane of Rubus fruticosus, 1m above ground, on bast, meal of bark beetle & wood. Ap. rehydr. light amber-yellow, greenish translucent. Asci *113-130 x 14.5-15,5 µm. Sp. *23-25.5 x 5.3-7 µm, 7-septate within turgescent asci already (there masked by the minute LBs, probably also 3-septate). From this are the attached photos.
  • message #7414
Hans-Otto Baral, 08-04-2009 21:53
Hans-Otto Baral
Re:Asco inconnu
So you see I am not sure with the genus and I never saw something comparable in the literature. There exist similar collections with 3-septate spores from Spain (HB 5516, see DVD), and one with spores similar as yours but only 3-septate. The latter I found in abundance in my village on a cultivated, free-standing living apple tree, on the detaching bark of the main stem in 1 m above ground (where also Hysteropatella prostii grows). I am not at all sure if there exist several specie or one very variable species. But I never saw the spores to germinate within the living asci. Do you have a photo?

Zotto
  • message #7415
Enrique Rubio, 08-04-2009 22:10
Enrique Rubio
Re:Asco inconnu
Yes, Zotto. The red arrow of my image marks one germinating spore inside the living ascus. I will send you by e-mail my images at bigger resolution.
Many thanks again
Enrique
  • message #7418
Hans-Otto Baral, 08-04-2009 22:14
Hans-Otto Baral
Re:Asco inconnu
O.k., but this is a dead ascus. Compare my living ascus near the apothecia.

Zotto
Enrique Rubio, 08-04-2009 22:33
Enrique Rubio
Re:Asco inconnu
How you can know if the ascus is alive or dead? It is for the turgescence of the ascus?
Hans-Otto Baral, 08-04-2009 23:06
Hans-Otto Baral
Re:Asco inconnu
of course, yes. Fresh fungi often contain some dead cells and dry fungi may be fully alive, so you must decide for every single cell if it still lives. Dead asci do not change their size when you add KOH or other lethal media, but living asci shrink enormously. Have a look at the main page of my website.

http://www.gbif-mycology.de/HostedSites/Baral/


Zotto