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15-01-2019 17:32

Acanthostigma multiseptatum ?
Ethan Crenson

Hello, In the Bronx, New York City last Saturday

18-12-2015 19:03

Literature request
Joop van der Lee

I am looking for the following documentation:  

15-01-2019 00:22

Leptosphaerulina?
Marcel Heyligen Marcel Heyligen

I found this asco by chance on the fruits of Capse

14-01-2019 15:56

Pyreno with subiculum.
Per Marstad Per Marstad

This was growing on a subiculum (see photo).Spores

13-01-2019 13:32

Lachnellula aff subtilissima
Andgelo Mombert

Bonjour à tous, Sur branchette d'Abies alba, le

13-01-2019 21:29

Tiny black bitunicate superficial on Platanus
Ethan Crenson

I find this unknown (to me) asco in the same locat

13-01-2019 19:04

Literatur
Sven Heinz Sven Heinz

Hello together, i am looking for this literature.

12-01-2019 14:05

Ceuthospora hederae?
Viktorie Halasu Viktorie Halasu

Hello forum,is this correctly identified as Ceutho

12-01-2019 13:29

Unknown setiform on dung
Marc Detollenaere Marc Detollenaere

Hello forum, On rabbit dung that I collected 2 we

12-01-2019 15:40

Another anamorph on Hedera
Viktorie Halasu Viktorie Halasu

Hello forum,there is another anamorph from Hedera

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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