16-09-2025 12:53
Philippe PELLICIERPézizes de 1-4 mm, brun grisâtres, sur les capsu
03-09-2025 12:44
Enrique Rubio
Hi to somebody.I would like to know your opinion o
15-09-2025 14:40
Nicolas VAN VOOREN
Hello.I'm searching for a digital copy of the seco
14-09-2025 22:16
Philippe PELLICIERApothécies petites jusquà 3 mm, oranges, avec de
13-09-2025 14:01
Thomas Flammerdark brown apothecia, splitIKI-Spores biguttulate
10-09-2025 17:18
Blasco Rafael
Hola, encontre este estiercol de vaca estos apotec
13-09-2025 14:10
Wim de GrootWe found this hymenoscyphus on rubus fruticulosis.
11-09-2025 16:57
Jason Karakehian
Our revision of Marthamycetales (Leotiomycetes) is
10-09-2025 23:53
Marcel Heyligen
Found on Robinia pseudoacasia together with Diapor
02-09-2025 11:34
Thomas Læssøehttps://svampe.databasen.org/observations/10527903
Lachnum rhytismatis
Chris Yeates,
06-06-2021 17:03
Bonjour tousI think this is the taxon on Vaccinium myrtillus without croziers.
Presumably the major problem is that there is no type material of Phillips' original collection on Acer pseudoplatanus? The Vaccinium host would appear to have some significance, and that whatever we call it is a different species from this collection on a Quercus leaf? http://www.ascofrance.com/uploads/forum_file/Lachnum-cf-rhytismatis-0001.pdf.
An interesting feature of this collection is that several of the asci showed distinct "Psilachnum bodies" as can be seen in two of these images.
Regards, Chris
Enrique Rubio,
06-06-2021 17:12
Re : Lachnum rhytismatis
Hi Chris
Why not Lachnum microsporum Velen.?
Regards
Enrique
Why not Lachnum microsporum Velen.?
Regards
Enrique
Chris Yeates,
06-06-2021 19:25
Re : Lachnum rhytismatis
Hello Enrique
I did wonder about that, and had looked at your images on AF and in Zotto's online database of images.
My main concern was that all these images show a distinctly stiped fungus and these were sessile (you can see the attachment "ring" in the 2nd image. To date I have only found these three apothecia but I have more leaves in the collection so will carefully check there. I have become very interested in the micro-fungi on Vaccinium myrtillus - a frequent plant close to where I live. For examplE I suspect there may well be an undescribed Micropeziza - http://www.ascofrance.com/search_forum/64691
I will see if I can find more apothecia of the Lachnum - I neglected to mention the spores were 5-5.6 x 1.3-1.6µm.
Best wishes, Chris
Chris Yeates,
06-06-2021 20:25
Re : Lachnum rhytismatis
I've just checked Velenovsky's protologue and there are a couple of issues. He describes Lachnum microsporum as "stipite tenui longo" which underlines my point above. There is the additional problem that the name Lachnum microsporum Velen. is invalid, being a later homonym of L. microsporum Torrend and therefore his fungus needs a new name . . .
Enrique Rubio,
06-06-2021 20:28
Re : Lachnum rhytismatis
Perhaps Zotto has some ideas on this. He may have studied some holotype.
Hans-Otto Baral,
06-06-2021 21:10
Re : Lachnum rhytismatis
I did not study the type as I remember, otherwise you must have seen my drawing. I was used to see lackin croziers on Vaccinium, but the matter with the croziers in correlation with the substrate was problematic. In the end, there was little DNA work on this, and the matter is not published (marketa was thinking about a new genus for the group).