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08-09-2009 18:26

Pulvinula cf laeterubra
Pablo Chacón Pablo Chacón

Salut des amis, Dans cette occasion il me plair

07-09-2009 00:17

?Amphirosellinia nigrospora
Hans-Otto Baral Hans-Otto Baral

The other on Quercus pubescens bark could be Amphi

07-09-2009 00:03

?Teichospora
Hans-Otto Baral Hans-Otto Baral

When detecting Proliferodiscus tricolor on a stand

05-09-2009 16:52

Mollisia coerulans?
Luc Bailly Luc Bailly

Genre difficile s'il en est: je soumets donc mes o

04-09-2009 22:52

What on Alnus catkins?
Marja Pennanen

Fruitbodies 0,1 to 0, 3 mm wide. Spores 9-2 x 2-3

04-09-2009 18:46

Diaporthaceae sur tige morte de Rubus sp.
Luc Bailly Luc Bailly

Bonjour à tous, Mercredi dernier, j'ai trouvé

04-09-2009 07:51

Helvella albella vs H. capucina
Nicolas VAN VOOREN Nicolas VAN VOOREN

Bonjour. Voici une récolte que je trouve ambiguÃ

03-09-2009 22:25

Sphaerosporella
Pablo Chacón Pablo Chacón

De bonnes nuits, un salut à tous. J'ai trouvé

02-09-2009 21:08

Lambertella sp.
Hermine Lotz-Winter

Bonjour, au bord d'un rivage dans le massif de

02-09-2009 19:38

Mollisia sp.
Nicolas VAN VOOREN Nicolas VAN VOOREN

Bonjour. Encore un Mollisia problématique... Ap

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Pseudonectria?
Björn Wergen, 22-03-2014 00:11
Björn WergenHi friends,

I have a collection from Braga, Portugal, on indetermined plant debris (very flat stems with hairs on the surface, I do not know what that is). On this substrate I have found a nectrioid species with a Volutella anamorph and Gibberella cyanogena with a Fusarium anamorph. According to Rossman 1999, Volutella is a common anamorph of the genus Pseudonectria, which unfortunately has one septated ascospores. Is there any other idea what this one can be?

Fruitbodies are about 200-260µm in diametre, orange-yellow and with prominent papilla, with a 7-15µm broad wall and 8spored asci about 70-90x6,5-8µm. Spores are 8,2-10,3x4-4,5µm, 2celled and with dotted surface. KOH negative.

Thanks in advance for any help.

regards,
björn
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Walter Gams, 22-03-2014 10:17
Walter Gams
Re : Pseudonectria?
Dear Björn, It seems that you have the rare teloeomorph of the very common Volutella ciliata. volutella is heterogeneous as shown by Gräfenhan et al. in Stud. Mycol. 68: 79-113. The teleomorph of Volutella s. str. was formerly in Cosmospora, but is now segregated and the generic name Volutella will be retained for these fungi. On the other hand, Volutella buxi is now in Pseudonectria buxi.  In a study of these fungi many years ago, Gary Samuels confused this fungus with the teleomorph of V. minima. A detailed description of the teleomorph with molecular study of an isolate would be worth while.
Björn Wergen, 22-03-2014 11:26
Björn Wergen
Re : Pseudonectria?
Dear Walter,

so can I send you the collection for further studies? I am very interested in this.

regards,
björn