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16-06-2019 11:54

Nicolas VAN VOOREN Nicolas VAN VOOREN

Hello.Here is a Hymenoscyphus species growing on b

16-06-2019 12:07

Riet van Oosten Riet van Oosten

Hello, Found by Theo Westra, 13-06-2019 (The Neth

14-06-2019 15:32

Malcolm  Greaves Malcolm Greaves

A small group of Perithecia on rotten (salix?) woo

14-06-2019 09:40

Per Marstad Per Marstad

I have found this in Norway, on hardwood, laying o

14-06-2019 06:40

Django Grootmyers

What is this parasite of Cantharellus minor? Found

11-06-2019 01:49

Valencia Lopez Francisco Javier

Hola amigos...Adjunto fotos de unas supuestas Para

11-06-2019 00:32

Elisabeth Stöckli

Bonsoir, Sur feuilles de ronce (Rubus/roncier à

11-06-2019 16:20

Garcia Susana

Hola, He recolectado este asco sobre estiercol, c

12-06-2019 22:42

Ethan Crenson

Hello all, A friend noticed these tiny fruiting b

11-06-2019 00:08

Ethan Crenson

Hello all, I found a few of these tiny black cush

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Tiny black bitunicate superficial on Platanus
Ethan Crenson, 13-01-2019 21:29
I find this unknown (to me) asco in the same location in the Bronx, NYC, during the cold months on Platanus.  This was collected on Platanus × acerifolia on January 6th on a fallen branch.  The ascomata cluster on the bare wood and tend to congregate in the grooves on the surface.  They measure .3 to .5 mm in diameter and can be pyriform when hydrated, collapsing when dry. 

Asci measure 124-161 by 21-27µm.  Bitunicate.  Ascospores are yellow brown, 4-7 septate, some with longitudinal septa. Thick walled.  They tend to be most constricted at the central septation.  At times the cell closest to that septation is enlarged.  Within the asci I have observed ascospores both with and without a gelatinous sheath.  Ascospores measure 32-46 by 9-11.5µm. 

Does anyone know what this could be?  I have consulted Margaret Barr's "Prodromus to Class Loculoascomycetes" without success.  I vaguely considered Trematosphaeria britzelmayriana, which seems to fit microscopically, but the ascomata are submerged in that taxon. 

I have posted this same organism twice on AF before...
11 Feb. 2018:
http://www.ascofrance.com/search_forum/52273
17 Nov. 2017:
http://www.ascofrance.com/search_forum/51237

Any help would be appreciated.
Thanks!
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Simon Kennedy, 16-01-2019 11:50
Re : Tiny black bitunicate superficial on Platanus
I am sorry that I cannot help and I am surprised that no-one has come up with an answer.  Do persevere with inquiries.  Surely, someone will come up with a name,

Simon
Ethan Crenson, 16-01-2019 15:57
Re : Tiny black bitunicate superficial on Platanus
Hi Simon,

I don't plan to give up.  Though I don't have much experience with the process, I am going to try to culture this collection and sequence it.  I don't have access to a professional lab, so I'll be relying on dumb-luck more than anything else. 

Thanks for the encouragement.

Ethan
Alain GARDIENNET, 16-01-2019 21:23
Alain GARDIENNET
Re : Tiny black bitunicate superficial on Platanus

Hi Ethan,


Look more towards Leptosphaeriaceae. I don't know your fungus.


Alain

Björn Nordén, 23-01-2019 18:58
Re : Tiny black bitunicate superficial on Platanus
Looks like Phaeosphaeria.
Dartanha Soares, 01-02-2019 18:29
Dartanha Soares
Re : Tiny black bitunicate superficial on Platanus
Hi Ethan, check the names below.

The name L. platanicola F. Petrak is illegit. but you can find the description on http://www.cybertruffle.org.uk/cyberliber/index.htm
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Ethan Crenson, 02-02-2019 19:48
Re : Tiny black bitunicate superficial on Platanus
Thank you all for the suggestions.  The L. platanicola from Howe is erumpant and the spores are 3-septate, so that is ruled out.  The L. platanicola of Petrak is closer to my collection, but the spore size is considerably smaller (at least in two of the three of my collections).  But maybe it has potential.  I will look also in Phaeosphaeria as well.
Mlcoch Patrik, 03-02-2019 23:34
Mlcoch Patrik
Re : Tiny black bitunicate superficial on Platanus
I think, that it isn´t Leptosphaeria species, but it is Platystomum. (Or somethink with Lophiostomataceae).
Ethan Crenson, 15-04-2019 23:14
Re : Tiny black bitunicate superficial on Platanus
A colleague of mine had an idea about this that I think is a good one.  She suggested Splanchnonema platani.  We frequently find Macrodiplodiopsis desmazierii, the anamorph.  Does anyone have any thoughts about this?
Mlcoch Patrik, 17-04-2019 17:59
Mlcoch Patrik
Re : Tiny black bitunicate superficial on Platanus
Splanchnonema platani is good idea.