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30-08-2024 20:06
Dirk GerstnerMollisia on Typha_angustifolia I found the follow
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30-08-2024 19:48
![Andgelo Mombert](/uploads/user_vgn/Mombert-0001.jpg)
Bonsoir, J'aimerais avoir votre avis sur ce Cordy
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28-08-2024 18:26
![Peter Welt](/uploads/user_vgn/Welt-0001.jpg)
BARRON GL, CAIN RF, GILMAN JC (1961): A revision o
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27-08-2024 19:03
I found some Hymenoscyphus-like apothecia on cupul
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27-08-2024 17:12
![Zuzana Sochorová (Egertová)](/uploads/user_vgn/Egertova-0001.jpg)
Hello,I would like to consult this little Peziza,
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26-08-2024 16:30
![Zuzana Sochorová (Egertová)](/uploads/user_vgn/Egertova-0001.jpg)
Hello,yesterday I collected this Phaeohelotium on
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24-08-2024 22:11
![Thierry Blondelle](/uploads/user_vgn/-0211.jpg)
Bonjour,Récolté au milieu d'un ruisseau. Est-il
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22-08-2024 17:10
![Zuzana Sochorová (Egertová)](/uploads/user_vgn/Egertova-0001.jpg)
Hello,I have this collection of Ciboria gallincola
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22-08-2024 17:59
![Edvin Johannesen](/uploads/user_vgn/Johannesen-0001.jpg)
Hi!I just wonder if Peziza badia can exude plenty
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20-08-2024 23:32
Alden DirksAny ideas on what this Leotiomycetes growing on Ph
Pale Nectria on Fagus
Martin Bemmann,
29-11-2010 00:14
![Martin Bemmann](/uploads/user_vgn/Bemmann-0001.jpg)
I know, Nectriaceae are very difficult (and that is more or less all I know about N. ;-) ). But these Nectrias maybe have some features that may allow someone of you to determin them:
I found them on a sturdy fragment (ca. 12-15 cm dm) of a Fagus trunk with whiterot, partly decorticated. Other fungi were Orbilia delicatula/leucostigma and Rhizodiscina lignyota.
The tiny (0,2 mm dm.) perithecia are embedded in a white subiculum. Colour is pale orange, older specimen are broken or collapsed. The ascus wall seems to be very thin, since it was almost unvisible to me. Spores are one to mostly two celled with a sometimes asymmetrically shape (5,3-6,5 x 3,1-4,1 µm). Paraphyses are filiform with small oildrops.
Any comments appreciated!
I will try to keep the specimens allive for further investigation.
Best regards,
Martin
PS: reminds me to nougat de Montelimar...
Christian Lechat,
29-11-2010 06:48
![Christian Lechat](/uploads/user_vgn/Lechat-0002.jpg)
Re:Pale Nectria on Fagus
Hi Martin,
maybe your fungus is a Nectriopsis, it would be necessary to test the reaction in KOH.
Besides, I would like to know if the hyphae covering ascomatal wall are spinulose or smooth.
Finaly, could you make a vertical section through the ascomatal wall?
Best wishes
Christian
maybe your fungus is a Nectriopsis, it would be necessary to test the reaction in KOH.
Besides, I would like to know if the hyphae covering ascomatal wall are spinulose or smooth.
Finaly, could you make a vertical section through the ascomatal wall?
Best wishes
Christian
Martin Bemmann,
29-11-2010 22:50
![Martin Bemmann](/uploads/user_vgn/Bemmann-0001.jpg)
Re:Pale Nectria on Fagus
Hi Christian,
thank you for your interest!
As for your question to the surface of the hyphae, they are not smooth but warty spinulose.
What do you expect, what should I observe, in KOH at what magnification? A change of colour of the perithecium?
Well a section of these very tiny fungi will be a real challenge, but I will try...
Cheers,
Martin
thank you for your interest!
As for your question to the surface of the hyphae, they are not smooth but warty spinulose.
What do you expect, what should I observe, in KOH at what magnification? A change of colour of the perithecium?
Well a section of these very tiny fungi will be a real challenge, but I will try...
Cheers,
Martin
Martin Bemmann,
30-11-2010 00:11
Martin Bemmann,
30-11-2010 00:38
Christian Lechat,
30-11-2010 06:48
![Christian Lechat](/uploads/user_vgn/Lechat-0002.jpg)
Re:Pale Nectria on Fagus
Hi Martin,
according to the characters that you provide, such not changing color in KOH, ascospores size and subiculum composed of spinulose hyphal elements, I think it could be Nectriopsis oropensoides (Rehm) Samuels. You should look for in this genus to confirm possibly this hypothesis.
best whishes
Christian
according to the characters that you provide, such not changing color in KOH, ascospores size and subiculum composed of spinulose hyphal elements, I think it could be Nectriopsis oropensoides (Rehm) Samuels. You should look for in this genus to confirm possibly this hypothesis.
best whishes
Christian
Martin Bemmann,
30-11-2010 10:05
![Martin Bemmann](/uploads/user_vgn/Bemmann-0001.jpg)
Re:Pale Nectria on Fagus
Dear Christian,
thank you very much. I don't have access to Gary Samuels description 1988. But I found the "Key to Tropical Species of Nectria-like Fungi" (Samuels/Rossman/Schroers 2002) where it is keyed:
4. Perithecial hairs cylindrical, hyphal; ascospores 5.5-7 x 2.5-3.5 µm................Nectriopsis oropensoides (Rehm) Samuels (Samuels, 1988a)
Could it be that the "paraphyses" I showed above are such perithecial hairs? Or where do I have to search them?
Regards,
Martin
thank you very much. I don't have access to Gary Samuels description 1988. But I found the "Key to Tropical Species of Nectria-like Fungi" (Samuels/Rossman/Schroers 2002) where it is keyed:
4. Perithecial hairs cylindrical, hyphal; ascospores 5.5-7 x 2.5-3.5 µm................Nectriopsis oropensoides (Rehm) Samuels (Samuels, 1988a)
Could it be that the "paraphyses" I showed above are such perithecial hairs? Or where do I have to search them?
Regards,
Martin
Christian Lechat,
30-11-2010 12:50
Martin Bemmann,
30-11-2010 13:09
![Martin Bemmann](/uploads/user_vgn/Bemmann-0001.jpg)
Re:Pale Nectria on Fagus
Thank you very much!
The description fits well to the features I could observe. I saw as well the entry in the AscoFrance-database. The spores of this collection look more cylindrical then those in mine. But this evening I will make a new slide in CB to document the verrucous surface of the spores which is only faintly visible in my water mount.
Best regards,
Martin
The description fits well to the features I could observe. I saw as well the entry in the AscoFrance-database. The spores of this collection look more cylindrical then those in mine. But this evening I will make a new slide in CB to document the verrucous surface of the spores which is only faintly visible in my water mount.
Best regards,
Martin
Alex Akulov,
30-11-2010 21:43
Martin Bemmann,
30-11-2010 23:58
Martin Bemmann,
02-12-2010 00:17