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18-11-2017 21:19

Edmond POINTE Edmond POINTE

Bonjour,Je suuis perplexe quand a mettre un nom su

18-11-2017 14:26

Bernard Declercq Bernard Declercq

Dear forum members,Who can supply me a pdf of foll

18-11-2017 16:45

Gilbert MOYNE

Voici un asco qui me pose problème et je n'arrive

17-11-2017 21:10

Garcia Susana

Sobre madera en zona muy húmeda.No consigo identi

18-11-2017 07:44

Andrés Valverde Valera Andrés Valverde Valera

Bonjour, Je ne sais pas si peut être cette espèc

16-11-2017 15:41

Zoltan Lukacs Zoltan Lukacs

Hello,I have absolutely no idea on this one. (Subs

17-11-2017 06:43

Ethan Crenson

From the Bronx, NYC on Platanus × acerifolia. On

10-11-2017 21:23

Garcia Susana

HolaPeritecio inmerso en madera de haya.No llego a

15-11-2017 23:50

Danny Newman Danny Newman

note cruciate/sulcate ostiolar necks. paraphyses

16-11-2017 17:01

Pavol Palo

Hi, I've found this ascomycete on a dead lying s

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gregarious Bionectriaceae with white conidial felt on Fagus wood
Hans-Otto Baral, 03-09-2017 17:56
Hans-Otto BaralHi Forum

From Hans Bender I got these pics of a macroscopically striking Bionectriaceae.

2.9.2017, MTB 4704/3 on decorticated branch of Fagus on ground.

Perithecia 0.2-0.3 mm diam., unchanged in KOH.
Asci with distinct apical ring (in MLZ).
Spores *8.5-10 x 2.9-3.4 µm, 1-septate, 4-guttulate.
Conidia ellipsoid, biguttulate, formed terminally on hyaline hyphoid conidiophores on white felt around the perithecia. 

Zotto
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Christian Lechat, 03-09-2017 18:53
Christian Lechat
Re : gregarious Bionectriaceae with white conidial felt on Fagus wood
Hi Zotto,
I think your fungus could be Lasionectria mantuana and its acremonium-like asexual morph. I have one specimen this species collected by Torstenof in Germany, which was cultured and sequenced.

All the best,
Christian.
Hans-Otto Baral, 04-09-2017 09:41
Hans-Otto Baral
Re : gregarious Bionectriaceae with white conidial felt on Fagus wood
Hi Christian

many thanks, I never heard of this. It is the type of Lasionectria. Do you lknow a more recent description of it?

Could you please send me a pdf of your article

Two-new-species-of-Lasionectria-Body-CLL10.03.12-0001.docx?

I only find the doc in the web.


Zotto
Christian Lechat, 04-09-2017 10:52
Christian Lechat
Re : gregarious Bionectriaceae with white conidial felt on Fagus wood
the most recent description of this species is in Rossman et al. (1999).
Here is the PDF of Two-new-species-of-Lasionectria.
Cheers,
Christian
Thomas Læssøe, 04-09-2017 13:12
Re : gregarious Bionectriaceae with white conidial felt on Fagus wood
is "Nectria flavida Corda" the same or ???


cheers
Hans-Otto Baral, 04-09-2017 15:48
Hans-Otto Baral
Re : gregarious Bionectriaceae with white conidial felt on Fagus wood
Thanks! I made a compilationm of Rossman& Samuels data from the holotype.

Spore size would actually fit perfectly, but not the size evaluated from the given scale.

Also the perithecia are not as crowded. But it is good to see that this seems to be something special.

If you want the material, Hans will be happy to send it to you. Not sure if I find your address rapidly.

Zotto
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Christian Lechat, 04-09-2017 16:55
Christian Lechat
Re : gregarious Bionectriaceae with white conidial felt on Fagus wood
Hi Thomas,
 Nectria flavida = Lasionectria flavida according IF. I don't know this ghost species, which would have ascospores 17 µm long.
Christian
Christian Lechat, 04-09-2017 17:03
Christian Lechat
Re : gregarious Bionectriaceae with white conidial felt on Fagus wood
Zotto,
ascospores of Torsten's collection are 7.5-)8-10(-10.5) x 2.8-3.5 µm, striate. Striation is difficult to see.Phylogenetic analysis of its ITS and LSU sequences showed 100% similarity with Lasionectria mantuana.

Your specimen could be interesting and I would like to examine it if possible.
My address:
Ascofrance
C. Lechat
64 route de Chizé
79360 Villiers-en-Bois
France

Regards,
Christian
Hans-Otto Baral, 04-09-2017 17:13
Hans-Otto Baral
Re : gregarious Bionectriaceae with white conidial felt on Fagus wood
Thanks, I told him.
If you have an illustration of Torsten, can I see it for comparison?

The sequenced sample is from Finland by U. Söderholm, as I see in GenBank and CBS.
Christian Lechat, 04-09-2017 18:04
Christian Lechat
Re : gregarious Bionectriaceae with white conidial felt on Fagus wood
here is an image of Torsten's fresh specimen. I did not see fresh material.
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Hans-Otto Baral, 04-09-2017 18:29
Hans-Otto Baral
Re : gregarious Bionectriaceae with white conidial felt on Fagus wood
Yes, this looks quite similar. 

I am not sure if this fungus survives well when air-dried and you receive it in some days. What do you think? Hans will send it tomorrow.
Christian Lechat, 04-09-2017 21:12
Christian Lechat
Re : gregarious Bionectriaceae with white conidial felt on Fagus wood
no problem, usually, Hypocreales are still exploitable several weeks after the collecting.
Christian
Christian Lechat, 12-09-2017 03:01
Christian Lechat
Re : gregarious Bionectriaceae with white conidial felt on Fagus wood
Hi Zotto,
I received the specimen two days ago for examination.
This fungus is not the same than the specimen collected by Torsten Richter and differs from it in having verruculose ascospores, while Torsten's specimen has striate ascospores.
I am not sure that the specimen collected by Hans Bender belong to the genus Lasionectria such as currently considered. I tried to culture this collection, the ascospores are germinating after one day. Sequencing is required to know where is placed this fungus. If it is not Lasionectria, it could be the genus Protocreopsis.
Christian
Hans-Otto Baral, 12-09-2017 07:48
Hans-Otto Baral
Re : gregarious Bionectriaceae with white conidial felt on Fagus wood
Hi Christian
interesting! Well, this may be all true and it throws a light on the current tendency of strong generic splits which require sequencing to know the genus. We have lots of such cases in Orbilia with very slight morphological differences but a great molecular distance, placing two very similar species in two very remote clades, and one may consider different genera for them. We have it easier, as we currently place all in the big genus Orbilia, but we have the problem of our subgeneric groups: shall we put emphasis more on morphology or on genetics?
Zotto