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17-07-2025 11:55

Castillo Joseba Castillo Joseba

De ayer en bosque de hayas y abetos, en tieraEjemp

16-07-2025 17:34

Bernard Declercq Bernard Declercq

Hello,I have trouble distinguishing above mention

14-07-2025 11:20

Michel Hairaud Michel Hairaud

Bonjour, Voici une espèce de  (?) Hyaloscyphace

15-07-2025 13:27

Angel Pintos Angel Pintos

Hello, does anyone have access to the following ar

16-01-2023 21:31

Riet van Oosten Riet van Oosten

Hello, Nearby the find of Calycina claroflava on

14-07-2025 17:55

Yanick BOULANGER

BonjourAutre dossier laissé en suspendJe viens de

14-07-2025 11:17

Yanick BOULANGER

BonjourJ'ai un dossier Jackrogersella qui est rest

14-07-2025 15:52

Gernot Friebes

Hi,I wanted to share this collection on Rubus idae

14-07-2025 13:37

Gernot Friebes

Hi,do you think this collection could be R. ulmari

25-02-2023 18:36

Elisabeth Stöckli

Bonsoir, Trouvé sur un tronc de Salix recouvert

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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