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Viktorie Halasu
Hello, could anyone please send me the article wi
06-04-2026 19:40
David Gibbs
Help with this one much appreciated, on rotting Fa
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Louis DENYBonjour forum, Trouvé sur bois de feuillu très d
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Juuso ÄikäsLast Tuesday I found some tiny white Helotiales gr
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Robin Isaksson
Hi!Found i Japan on bark of Abies sp. Spores 35-4
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Lothar Krieglsteiner
some days ago, on the lower surface of leaf of Que
Which Xylariaceae?
Garrett Taylor,
27-12-2019 05:59
I found this two days ago on decorticated Ulmus in New York State, in the USA, North America. It was in patches about 1-5 cm long and less wide, on the underside mostly. I couldn't get past Xylariaceae in Wergen. I am including a shot of the inside of it's shell. I need to go back and get better pics, but I didn't see any more details than I photographed. The interior of the outer "shell" is pictured at high magnification. I didn't see ostioles, or asci for that matter. Pretty dark green in KOH. Spores: (10.1) 11 - 13.7 (26.5) × (3.7) 3.9 - 5.1 (6.3) µmQ = (2.1) 2.4 - 3 (3.3) ; N = 35
Me = 12.4 × 4.6 µm ; Qe = 2.7
Jacques Fournier,
27-12-2019 12:07
Re : Which Xylariaceae?
Hi Garrett,
your fungus is suggestive of Pyrenomyxa, a genus revised in 2005 by Stadler et al., Mycologia 97(5): 1129-1139.
Two of the three species could match your find, P. picea and P. morganii, more likely the former because of the apparently orange brown colour of the stroma shown by your photo.
If you check the paper you should get to a more reliable identification.
Cheers,
Jacques
Garrett Taylor,
28-12-2019 05:37
Re : Which Xylariaceae?
Thanks so much, Jacques! After reading the material you suggested, it does appear your intuition that this is Pyrenomyxa picea (Ellis) M. Stadler, Læssøe & Lar. N. Vassiljeva, comb. nov. is correct in this instance. The spores here are slightly larger than reported, but this was a fresh specimen.
P. morganii has only been collected in Eastern Russia. It's KOH-extractable pigments are all of the colors, even purple after a time.
P. invocans is also reddish brown and also found near me, but it's KOH-extractable pigments are orange, not green.
This isn't the first time for me finding this Genus, so it feels extra great to know what it is!
*I edited the spore size as I truncated the first part of the length measurment originally.
P. morganii has only been collected in Eastern Russia. It's KOH-extractable pigments are all of the colors, even purple after a time.
P. invocans is also reddish brown and also found near me, but it's KOH-extractable pigments are orange, not green.
This isn't the first time for me finding this Genus, so it feels extra great to know what it is!
*I edited the spore size as I truncated the first part of the length measurment originally.
Jacques Fournier,
28-12-2019 16:33
Re : Which Xylariaceae?
Thanks for our enthusiastic answer Garrett.
Actually I just know Pyrenomyxa from literature and I do not expect to find it in Western Europe.
Actually I just know Pyrenomyxa from literature and I do not expect to find it in Western Europe.
I you ever come across some material in good condition again, I would be very grateful if you can send me a sample, gently air-dried, wrapped in paper and posted by ordinary mail.
Thanks a lot!
Jacques
Garrett Taylor,
29-12-2019 04:45
Re : Which Xylariaceae?
There are a few of them on that log that looked like they were in nice shape, if you send me your address I will glady try to see if I can get some off in one piece and send a sample along. My email is taygamu at gmail.com