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18-04-2019 15:25

Castillo Joseba Castillo Joseba

Especimen  con apoterios en forma de disco de col

16-04-2019 15:10

Malcolm  Greaves Malcolm Greaves

HelloCan someone help with this found on a dead/dy

14-04-2019 16:53

Marc Detollenaere Marc Detollenaere

Dear forum, On the bark of Larix I found some som

13-01-2019 21:29

Ethan Crenson

I find this unknown (to me) asco in the same locat

17-04-2019 16:40

Jac Gelderblom

I am looking for Holm & Holm: Lophiostomatacea

16-04-2019 15:09

Thomas Læssøe

Form small pinki cushions on the surface - recall

12-04-2019 14:11

Michel Hairaud Michel Hairaud

Bonjour, Voici une Helotiale manifestement liée

16-04-2019 02:06

Ethan Crenson

Hello, Yesterday in New York City on Pinus strobu

16-04-2019 18:02

Ethan Crenson

I am looking for: Barr, M.E. 1982. On the Pleoma

14-04-2019 14:57

Edvin Johannesen Edvin Johannesen

I am struggling a bit to identify this one. First

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Yellow Nectria (aff. pallidula?)
Edvin Johannesen, 18-01-2019 22:14
Edvin Johannesen
Dear all,

This nectriaceous species was growing erumpent on twigs of old, but living plum tree (Prunus). Ascospores measure ca. 13 x 4-6 microns, and become warted and 1-septate at maturity. Is this sufficient for identification or does it need further studies?
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Christian Lechat, 19-01-2019 06:20
Christian Lechat
Re : Yellow Nectria (aff. pallidula?)
Hi Edvin,

maybe your fungus is Bionectria. Vertical section through ascomatal wall could be very useful as well as the reaction in KOH and lactic acid. Please, check if there is an asexual state on the substrate or around the stromata, which should be clonostachys-like.

All the best,

Christian
Edvin Johannesen, 19-01-2019 11:36
Edvin Johannesen
Re : Yellow Nectria (aff. pallidula?)
Thanks, Christian. Do you mean cotton blue or plain lactic acid (which I do not have)? What to look for? Do you have a good article on Bionectria? I have limited access to literature on the internet.

Best regards,

Edvin
Edvin Johannesen, 19-01-2019 13:47
Edvin Johannesen
Re : Yellow Nectria (aff. pallidula?)
The ascomatal wall appears two-layered; an outer yellow and an inner hyaline layer.  I have also tested iodine reactions. Neither Barals (alone) or Lugol after pre-treatment with 3% KOH gave any detectable staining.
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Edvin Johannesen, 19-01-2019 13:49
Edvin Johannesen
Re : Yellow Nectria (aff. pallidula?)
Apart from a few structures associated with the ascomata, an anamorph is not evident. Do these images show clonostachys or is this something else?
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Christian Lechat, 19-01-2019 15:35
Christian Lechat
Re : Yellow Nectria (aff. pallidula?)
you should take a look at Schroers 2001 A Mponograph of Bionectria Studies in Mycology 46.

Regards,

Christian
Edvin Johannesen, 19-01-2019 15:38
Edvin Johannesen
Re : Yellow Nectria (aff. pallidula?)
Thanks, again. I will see if I have access. I am thinking now maybe B. ochroleuca, but need to check further.

Regards,

Edvin