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15-01-2019 17:32

Acanthostigma multiseptatum ?
Ethan Crenson

Hello, In the Bronx, New York City last Saturday

14-01-2019 15:56

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Per Marstad Per Marstad

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

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Literatur
Sven Heinz Sven Heinz

Hello together, i am looking for this literature.

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Nectria sp. and its Anamorph (?)
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Hi there,Bernd Fellmann found an interesting Nectr

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

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.

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

Great find!
Andy
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.  amiller7@illinois.edu

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

Cheers,
Andy