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02-08-2025 12:35

éric ROMERO éric ROMERO

Bonjour tous, J'ai trouvé sur pétiole de Fraxin

02-08-2025 17:21

Andgelo Mombert Andgelo Mombert

Bonjour,Je recherche la description et la planche

30-07-2025 20:52

Bohan Jia

Hi together,  I've been looking posts in AscoFra

30-07-2025 10:12

Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous m'aider à

31-07-2025 16:32

Andreas Gminder Andreas Gminder

Dear collegues,today I found on a very fresh fire

30-07-2025 18:06

Stefan Jakobsson

On a decorticated twig of Alnus incana on moist so

29-07-2025 18:59

Castillo Joseba Castillo Joseba

Me mandan el  material seco de Galicia, España,

28-07-2025 12:34

Enrique Rubio Enrique Rubio

Hi to everybody.I would appreciate any ideas about

28-07-2025 04:59

Richard Droker

Growing on resin (over moss on Tsuga heterophyll)l

13-06-2025 09:41

Josep Torres Josep Torres

Hello.A cerebriform ascomycete sprouting scattered

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Hysteriaceous asco with brown didymospores
Gernot Friebes, 21-02-2016 19:05
Hi,

I collected this fungus on bark of living Pinus sylvestris – ascospores measure about 25–27 x 10.5–11 µm and become 3-septate when overmature. Most other characters should be shown on the photos but if not I will check the material again, of course. I'd appreciate any ideas!

Best wishes,
Gernot
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Kutorga Ernestas, 22-02-2016 07:29
Re : Hysteriaceous asco with brown didymospores
Hello,

Hysterium could be an option, e.g. H. cf. pulicare (3 septate ascospores).

Ernestas
Gernot Friebes, 22-02-2016 11:26
Re : Hysteriaceous asco with brown didymospores
Hi Ernestas,

thanks, but I would exclude H. pulicare due to different morphology of ascospores and asci. Other Hysterium species don't really seem to fit either (checking the website by Eric Boehm).

Best wishes,
Gernot
Alain GARDIENNET, 22-02-2016 17:15
Alain GARDIENNET
Re : Hysteriaceous asco with brown didymospores

Hi Gernot,


Of course you have seen that anything fits within Hysteriales. It's a very interesting fungus.


But have you looked towards Hysteropatella ? How are ascomatas when they are moist?


Alain

Gernot Friebes, 23-02-2016 14:05
Re : Hysteriaceous asco with brown didymospores
Thanks, Alain,

after rehydrating the ascomata properly they do indeed open similarly to Hysteropatella so I think that's a good direction. Maybe someone knows a Hysteropatella with similar ascospores?

Best wishes,
Gernot
Alain GARDIENNET, 23-02-2016 14:13
Alain GARDIENNET
Re : Hysteriaceous asco with brown didymospores

I don't know this genus, but perhaps you will go to the solution with the paper : http://www.mycosphere.org/pdf/Mycosphere_6_3_7.pdf


Alain

Gernot Friebes, 23-02-2016 14:23
Re : Hysteriaceous asco with brown didymospores
Thanks again, I will study that paper!

Best wishes,
Gernot
Per Vetlesen, 23-02-2016 21:55
Re : Hysteriaceous asco with brown didymospores
Hi

I am very interested in this fungus!
3 times I have collected an asco on bark Pines sylvestris which might be the same as this one. So far I have called it cf Poetschia cratincola. It do not fit the original description of Karschia cratincola very well, so even the genus may be wrong?


Ascospores: (25,0) 28,1 – 29,8 (32,5) x (9,1) 9,5 -10,8 (12,4) µm
Asci: (4?) 8-spored, (53) 58.4 - 77.8 (85.4) × (20.6) 22.4 - 31.1 (31.4) µm


Best wishes,
Per

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Björn Wergen, 23-02-2016 22:16
Björn Wergen
Re : Hysteriaceous asco with brown didymospores
Hi,

I guess the fungi posted here belong to Poetschia. I have found a similar species on bark of Pinus with globose asci (P. buellioides) and Minutisphaera japonica (freshwater habitat).


Did you read Kutorga & Hawksworth 1997?

regards,
björn
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Gernot Friebes, 23-02-2016 23:44
Re : Hysteriaceous asco with brown didymospores
It seems like this is a good direction. Very interesting that you found presumably the same fungus, Per! Having briefly looked through the literature available to me I still haven't encountered a species that would correspond well enough to this material but maybe a fitting name will emerge eventually. Thanks to everyone for sharing your experience!

Best wishes,
Gernot
Per Vetlesen, 23-02-2016 23:59
Re : Hysteriaceous asco with brown didymospores
Hi

No, I do not have Kutorga & Hawksworth 1997, is it on the internet?
I've read a key on MycokeyDK: Diverse småfamilier (Ascocorticiaceae, Gelatinodiscaceae, Patellariaceae, Odontotremaceae, Ostropaceae, Triblidiaceae and unplaced genera) http://www.mycokey.com/MycokeyDK/DKkeysPDFs/DiverseSkiver.pdf The desription of Poetschia buellioides there fit quite well, but it supposed to grow on broadleaved trees? P. cratincola is fund on broadleaves trees and conifers but have bigger spores.


I think it is very similar to your photos, Björn, of P. buellioides, The shape of the asci may depend on how hard you press the glass on the slide? Here is another picture of an asci.


Is it P. buellioides?


Best wishes,
Per

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Alain GARDIENNET, 24-02-2016 00:02
Alain GARDIENNET
Re : Hysteriaceous asco with brown didymospores

Gernot,


Have you observed young asci in Meltzer's reagent ?


Alain


PS : Minutisphaera is different.

Gernot Friebes, 24-02-2016 00:08
Re : Hysteriaceous asco with brown didymospores
You can download Kutorga & Hawksworth here: https://www.researchgate.net/publication/277870823_A_reassessment_of_the_genera_referred_to_the_family_Patellariaceae_Ascomycota_Syst_Ascomycetum

The ascospores of P. buellioides should have germ pores – I would have to check that again in my material. The ends of the ascospores of my collection are a bit lighter but I'm not sure if that's due to germ pores.

Alain, I only used Lugol, do you expect any different reaction in Melzer's?

Best wishes,
Gernot
Alain GARDIENNET, 24-02-2016 07:54
Alain GARDIENNET
Re : Hysteriaceous asco with brown didymospores

Hi Gernot,


My question refers to the tholus Melzer + of young asci seen in the paper of Mycosphere.


About the pore, you can use chloral-lactophenol to detect them better.


Best wishes,


Alain

Per Vetlesen, 24-02-2016 12:18
Re : Hysteriaceous asco with brown didymospores
Hi everybody,
thank you very much so fare for help and links.

There is no blue reaction with either Lugol or Melzers. KOH + Lugol blue reaction is also emphasized by Kutorga & Hawksworth 1997, and then I think we can exclude P. buellioides.
I have not observed any germ pores, but as you write, Gernot, the spores are lighter in the ends. I do not have chloral-lactophenol. Today I observed that some of the spores look like they are germinating.


Best wishes,
Per

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Gernot Friebes, 25-02-2016 10:42
Re : Hysteriaceous asco with brown didymospores
Hi Alain,

I've made the same observation as Per – no blue reaction in Melzer's reagent...

Best wishes,
Gernot
Per Vetlesen, 25-02-2016 11:57
Re : Hysteriaceous asco with brown didymospores
Hi

This fungus must be quite common in my district in Hedmark, Norway. Yesterday I collected some pieces of bark from a Pinus sylvestris near my home and there it was again! I have not studied Pinus-bark in particular, only some few bark pieces from 6 trees and this asco was found on 4 of them!


Best wishes,
Per

Alain GARDIENNET, 21-12-2022 17:51
Alain GARDIENNET
Re : Hysteriaceous asco with brown didymospores
Did any one got supplementary news since that discussion ?
I just collected... on Pinus sylvestris, too.
Best wishes,
Alain
Gernot Friebes, 21-12-2022 17:56
Re : Hysteriaceous asco with brown didymospores
Björn Nordén suggested Poetschia buellioides in a different thread: http://ascofrance.com/search_forum/72070

Best wishes,
Gernot
Alain GARDIENNET, 21-12-2022 18:46
Alain GARDIENNET
Re : Hysteriaceous asco with brown didymospores
Thanks Gernot, I forgot this thread, and so, this interesting paper for Björn.
Nice fungus definitively.
Guy Marson, 23-12-2022 09:04
Re : Hysteriaceous asco with brown didymospores
Salut Alain,

Voici 3 séquences du petit bijou:


MW045914
MZ206326
MZ411677


Joyeuses fêtes,


Guy