06-04-2026 21:36
Viktorie Halasu
Hello, could anyone please send me the article wi
06-04-2026 19:40
David Gibbs
Help with this one much appreciated, on rotting Fa
06-04-2026 11:07
Louis DENYBonjour forum, Trouvé sur bois de feuillu très d
06-04-2026 16:24
Juuso ÄikäsLast Tuesday I found some tiny white Helotiales gr
05-04-2026 20:40
Robin Isaksson
Hi!Found i Japan on bark of Abies sp. Spores 35-4
06-04-2026 08:15
Lothar Krieglsteiner
some days ago, on the lower surface of leaf of Que
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
Alain GARDIENNET,
07-11-2018 16:41
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