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25-03-2019 18:59

Riet van Oosten Riet van Oosten

Hello, Found by Jan Henk (14-11-2018, The Netherl

25-03-2019 11:58

Castillo Joseba Castillo Joseba

Me mandan de Galicia  esta muestra en seco ,  re

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Castillo Joseba Castillo Joseba

Me mandan el material seco de Galicia   recolecta

24-03-2019 23:14

Ridha EL MOKNI

Bonsoir Chers collègues,Je sèche devant cet spé

25-03-2019 08:12

Sava Krstic Sava Krstic

Cups about 1 mm across, growing in large numbers o

24-03-2019 20:36

Eike- Milorad Heinemann Eike- Milorad Heinemann

Hello together we found this Vibrissea yesterday

24-03-2019 00:18

Joop van der Lee

Found on horse dung,Again I found apothecia (2) th

24-03-2019 20:14

Eike- Milorad Heinemann Eike- Milorad Heinemann

Hello together, yesterday i found this Pyrenomyce

23-03-2019 16:06

Peter Thompson

Hello Everyone,I have found perithecia of a black

24-03-2019 13:46

Andgelo Mombert

Bonjour,Sur la face infère d'un morceau de bois d

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Lophiostoma sp on Acer query
Watt John, 07-11-2018 16:15
Growing on decorticate Acer is what otherwise seems to match a Lophiostoma sp though the many peritheciea are situated on a continuous black subiculum, which does not seem typical.

I see there are a number of Lophiostoma sps.: this one has transverse and longitudinal septae ( up to 5)

but the ascospores are rather smaller than L. compressum at 17.3 x 6.6 mc. I was unable to distinguish features of the ostiole on this rather dry collection.

John Watt
  • message #55097
  • message #55097
  • message #55097
Alain GARDIENNET, 07-11-2018 16:41
Alain GARDIENNET
Re : Lophiostoma sp on Acer query

Hi,


Please check if it's really one Lophiostoma species. I don't think. Ascomata should be immersed, with a lateral compressed neck. You can compare with pictures of Ascofrance database.


I guess that your ascomata are superficial growing on an old pyrenomycete. Microscopy reminds the genus Capronia.


Alain

Watt John, 07-11-2018 21:16
Re : Lophiostoma sp on Acer query
Thanks you, especially for pointing out the underlying pyrenomycete; that makes sense now.

 

I shall check out Capronia sps, which are also new to me; spores look very similar. Learning curve slowly going up. 

Stange to say, whilst looking at my next collection, I could unexpectedly see such spores , but this time 7 septate and rather more pointed at each end, in the squash and then found 0.25 mm perithecia on bark and also on white subiculum which otherwise doesn't reveal any features. May remain a mystery.  

Kind regards,

John Watt

Ormskirk, Lancashire