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01-06-2025 09:37

Octospora
Charles Aron Charles Aron

Hi All, I found this Octospora growing with liver

06-07-2025 19:36

Auda con esta
Castillo Joseba Castillo Joseba

me mandan el material de Galicia (España) recolec

05-07-2025 12:38

Pyrenomycetous fungi on dead Juniperus twig
Åge Oterhals

I found this pyrenomycetous fungi in pine forest o

04-07-2025 20:12

Black thready anamorph
Josep Torres Josep Torres

Hello.A fungus growing on the surface of a trunk o

20-06-2025 08:33

Ascomycete on a herbaceous stem.
Josep Torres Josep Torres

Hello.Small, blackish, mucronated surface grains s

28-06-2025 16:00

Salvia leaf parasite
Josep Torres Josep Torres

Hello.A tiny fungus shaped like globose black grai

04-07-2025 12:43

En tallo de herbaceas 1102
Castillo Joseba Castillo Joseba

me mandan el material seco de Galicia (España) 

03-07-2025 18:40

Melampsora ??? en Salix
Castillo Joseba Castillo Joseba

me mandas el material seco de Galicia (España) re

03-07-2025 20:08

Yellowish asco on submerged Larix needles
Francois Guay Francois Guay

I found this interesting yellowish asco growing on

01-07-2025 23:37

Help with a Pleosporal.
Josep Torres Josep Torres

Hello.A Pleosporal symbiotic organism located and

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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