Accès membres

Mot de passe perdu? S'inscrire

20-04-2019 01:02

Valencia Lopez Francisco Javier

Hola a todos/asAdjunto fotos de unas supuestas Tri

21-04-2019 21:40

Joop van der Lee

Found on cow dung.Measurements of the perithecia a

21-04-2019 12:06

Castillo Joseba Castillo Joseba

Me mandan el material desde Galicia,  recolectado

20-04-2019 10:47

Castillo Joseba Castillo Joseba

me envian esta muestra recolectada en madera de eu

12-04-2019 14:11

Michel Hairaud Michel Hairaud

Bonjour, Voici une Helotiale manifestement liée

20-04-2019 05:16

Roland Labbé

Bonjour ! Voici un anamorphe inconnu de nous, Sp

18-04-2019 15:25

Castillo Joseba Castillo Joseba

Especimen  con apoterios en forma de disco de col

16-04-2019 15:10

Malcolm  Greaves Malcolm Greaves

HelloCan someone help with this found on a dead/dy

14-04-2019 16:53

Marc Detollenaere Marc Detollenaere

Dear forum, On the bark of Larix I found some som

13-01-2019 21:29

Ethan Crenson

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

« < 1 2 3 4 5 > »
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!
  • message #55906
  • message #55906
  • message #55906
  • message #55906
  • message #55906
  • message #55906
  • message #55906
  • message #55906
  • message #55906
  • message #55906
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
  • message #56110
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.