Accès membres

Mot de passe perdu? S'inscrire

12-11-2014 09:41

Garcia Susana

Hi all, I have Collected a Diatrypaceae on hardwo

16-11-2014 15:05

Chris Yeates Chris Yeates

Bonjour tousYesterday I collected a small (0.5mm m

16-11-2014 20:25

Edit Szilvásy Edit Szilvásy

Dear Forum,Today I found growing on soil in additi

16-11-2014 04:09

John Plischke John Plischke

Does anyone know of any papers that talk about Hyp

16-11-2014 15:33

Yannick Mourgues Yannick Mourgues

Bonjour à tous.J'ai trouvée sur branche morte dÃ

16-11-2014 20:23

Ueli Graf Ueli Graf

Hallo,hat das jemand von euch?OHENOIJA E. (1995) -

16-11-2014 18:00

Beñat Jeannerot Beñat Jeannerot

Adio to all,Anyone has a good mail to join Niek Gr

11-11-2014 15:51

SYLVAIN ARD

Bonjour,Quels sont les ouvrages de référence et

14-11-2014 17:24

Ralph Vandiest Ralph Vandiest

Hello, In a grasland I found this very tall speci

14-11-2014 19:30

Salvador Tello

Hola a todos.Estoy buscando el siguiente artículo

« < 1078 1079 1080 1081 1082 > »
Cryptosphaeria?
Garcia Susana, 12-11-2014 09:41
Hi all,

I have Collected a Diatrypaceae on hardwood.


Here are some features:
Perithecia immersed, usually separated, spherical / ovoid with a diameter of 600-900um.
Ostioles emerging separately. With a round shape the diameter is about 350um.
Asci octosporadas on a long pedicel clearly IKI +
Are not mature perithecia and spores are difficult to obtain, however, the size of which are measured are on average 17.7x4.2um, and are slightly allantois.


With these data, I think it might be Cryptosphaeria and within this genre fits better with C.subcutanea.



You can give me your opinion?
Thank you very much, greetings


Susana

  • message #32073
  • message #32073
  • message #32073
  • message #32073
Jacques Fournier, 14-11-2014 10:07
Jacques Fournier
Re : Cryptosphaeria?
Hi Susanna,
again an interesting find. I agree it resembles Cryptosphaeria by many traits but in this genus the wood surface beneath the stromata is typically strongly blackened unlike what shows your photo 2.
I suggest you observe a stroma in vertical section and compare it to Rappaz' description.
Moreover, C. subcutanea which might fit as to ascospore dimensions differs in having inamyloid asci and a fairly boreal distribution on Salix.
Try to find mature ascospores to check whether they become pigmented or stay hyaline.
Good luck!
Jacques

Garcia Susana, 17-11-2014 20:58
Re : Cryptosphaeria?
Hello again:
I found mature perithecia, and spores are pigmented, they are brown.
I made cross sections, and I noticed that the perithecia are grouped two to three and their necks are emerging together.
There is a black dorsal line (Fig.2) and in some cases a ventral black line also appears (Figure 3).
Now I think it may be Eutypella dissepta. It can be?

Saludos
Susana
  • message #32161
  • message #32161
  • message #32161