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29-03-2024 09:21

Michel Hairaud Michel Hairaud

Bonjour, Je recherche la description du genre Mac

26-03-2024 17:14

Juuso Äikäs

These little black ascos were growing on a dead, d

28-07-2011 18:31

Alex Akulov Alex Akulov

Dear FriendsToday I made the pdf file of Velenovsk

27-03-2024 22:53

Charles Aron Charles Aron

Hi All,Recently I came across these minute, setose

25-03-2024 13:41

B Shelbourne B Shelbourne

• Hyaloscyphaceae (no VBs), Hyaloscypha: Macro a

25-03-2024 21:27

Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde, March 2024

26-03-2024 14:37

DAVID MARCOS DAVID MARCOS

Spores (telles qu'elles apparaissent à l'intérie

24-03-2024 08:27

Thierry Blondelle Thierry Blondelle

HiOn Hedera helix fallen branchEcological habitat:

26-03-2024 11:06

michel bertrand

Bonjour, Malgré de nombreuses recherches, je n'a

25-03-2024 14:08

Ursula Kozik

Bonjour et bonne journée, On m'a envoyé une tro

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White-black pyrenos
Juuso Äikäs, 06-08-2019 23:57
These were growing on pieces of wood on the bottom of a dry stream. The microscopy looks interesting to me, I haven't seen anything like this before. Maybe someone knows what these are?
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Andrew N. Miller, 07-08-2019 00:32
Juuso Äikäs, 07-08-2019 08:23
Re : White-black pyrenos
Thanks!
Hans-Otto Baral, 07-08-2019 09:47
Hans-Otto Baral
Re : White-black pyrenos
Hi Andrew and Juuso

I would have thought L. ovina (L. lanuginosa I do not know). What are the differences? You speak of the L. lanuginosa complex which is genetically so close to L. ovina that it might be difficult by morphology alone to distinguish it, but why are you sure here? 

Zotto
Andrew N. Miller, 07-08-2019 14:26
Andrew N. Miller
Re : White-black pyrenos
Zotto,
   
    I am sure because I am the World expert on this group...ha!  The tomentum is tight in L. ovina, but loose and can envelop multiple ascomata in L. lanuginosa.  Ascospores in L. ovina have short, awl-like appendages vs. long, lash-like appendages in L. lanuginosa.

Cheers,
Andy
Ethan Crenson, 07-08-2019 15:27
Re : White-black pyrenos
Thank you this is very helpful!  Looking back through some collections that I labeled L. ovina, I found this image.  The tomentum appears "tight", but the fruiting bodies are in some cases convergent, so that the tomentum appears to envelope multiple ascomata--or at least it could be construed that way. Which species would you say this is?
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Hans-Otto Baral, 07-08-2019 16:30
Hans-Otto Baral
Re : White-black pyrenos
o.k., thanks! But the appendages are invisible on the present photos. And how dense the tomentom here is?

Isn't it that Breitenbach & Kränzlin have L. lanuginosa then?

Did you ever see in my folder ovina? I have there awl-like appendages in HB 7942. In a sample by F. Schumm 16.IX.2012 the appendages are invisible (dead state), but the tomentum covers several perithecia.
Andrew N. Miller, 08-08-2019 15:40
Andrew N. Miller
Re : White-black pyrenos
Ethan, I would name this L. lanuginosa, but look for lash-like appendages on the ascospores to confirm.

Andy
Andrew N. Miller, 08-08-2019 15:52
Andrew N. Miller
Re : White-black pyrenos
Zotto,

  The lash-like appendages on the ascospores are not obvious in these photos, but can be seen by the well-trained eye... ;o)

   Breitenbach & Kränzlin correctly show L. ovina with tight, bright white tomentum and spores with short, awl-like appendages.

  No, never saw it.

Cheers,
Andy

Hans-Otto Baral, 08-08-2019 16:02
Hans-Otto Baral
Re : White-black pyrenos
Thanks!
Here:
https://drive.google.com/drive/folders/0B5SeyOEkxxZhYVZub0N1aGY5YTg
Go to 8a Sordariales,  -> Lasiosphaeriaceae ....
Andrew N. Miller, 08-08-2019 16:37
Andrew N. Miller
Re : White-black pyrenos
Thanks!  I see the awl-like appendages in HB 7942 (L. ovina), but there appears to be long, lash-like appendages in F. Schumm 16.IX.2012 (L. lanuginosa).

Cheers,
Andy
Hans-Otto Baral, 08-08-2019 16:43
Hans-Otto Baral
Re : White-black pyrenos
Yes indeed, it seems so! I would like to see L. lanuginosa in the living state. It seems the appendage is about of double length than L. ovina.
Andrew N. Miller, 08-08-2019 16:46
Andrew N. Miller
Re : White-black pyrenos
Yes, correct.

Andy