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18-02-2019 11:55

Elisabeth Stöckli

Bonjour, Sur mousse (tronc de Picea en décomposi

18-02-2019 19:45


Bonjour récolte sur épicéa, spores 62-83 x 3-3

18-02-2019 15:38

Savic Dragisa

Hi to all,I found today the branch of Ulmus sp. wi

18-02-2019 14:46

Riet van Oosten Riet van Oosten

Hello, Found by a mushroomfriend on Urtica. He ga

17-02-2019 22:45


OK avec cette détermination ?Merci d'avance pour

17-02-2019 23:17

Blasco Rafael Blasco Rafael

Hola, he recogido esta muestra sobre la corteza de

17-02-2019 11:50

Blasco Rafael Blasco Rafael

Hola, alguno de Ustedes dispone del siguiente Arti

16-02-2019 17:02

Per Marstad Per Marstad

I found this on desiduous wood, in Norway.Diameter

01-02-2019 14:37

Lothar Krieglsteiner Lothar Krieglsteiner

.. collected at 22.12.2013, Portugal, Algarve, nat

15-02-2019 20:44

Edvin Johannesen Edvin Johannesen

Hi! These black, semi-immersed/erumpent apothecio

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Acanthostigma multiseptatum ?
Ethan Crenson, 15-01-2019 17:32

In the Bronx, New York City last Saturday I found these setose superficial pyrenomycetes on a branch of hardwood.  I think they are Acanthostigma multiseptatum, mostly based on spore features.  I used the paper by Andy Miller and Itthayakorn Promputtha (2010) to reach this tentative ID. 

The hairs are brown measuring 86-112 x 5µm.  Asci bitunicate and IKI-, 111-116 x 17-24µm.  Spores multiseptate measuring 84-89 x 7.5-9.9µm.  I counted up to 14 septa, the spore slightly constricted at some of the septa.

The description in the Miller/Promputtha paper says the spores should not be constricted at the septa, but the length/width seem to fit and other features seem mostly within range. Am I correct that this is A. multiseptatum, or am I mistaken? 

Thanks in advance.

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Andrew N. Miller, 15-01-2019 19:26
Andrew N. Miller
Re : Acanthostigma multiseptatum ?
Looks right to me!  

Great find!
Ethan Crenson, 16-01-2019 16:00
Re : Acanthostigma multiseptatum ?
Thanks Andy!  By the way, if you don't mind I'd like to contact you by email about a (sort of) related matter.
Andrew N. Miller, 16-01-2019 17:35
Andrew N. Miller
Re : Acanthostigma multiseptatum ?
Sure thing.

If you have sufficient material, we should try to sequence this collection... or maybe even culture it.