21-09-2025 14:49
Ethan CrensonHi all, I am at a foray in central New York stat
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Heather MerryleesHi there!I am hoping for any advice on the identif
Unknown purple-black asco, long spores, brown epithecium
Ethan Crenson,
21-09-2025 14:49
Hi all,
I am at a foray in central New York state. Yesterday afternoon I found an intersting asco on hardwood in a dry stream bed growing amidst a group of orange ascos (probably Helotiales). They are purple black, smaller than 1/2 mm in diameter, barrel shaped.
The spores are long and multiseptate. They measure about 83-93 x 2.8-3.3µm. Asci are thick walled, IKI-. Paraphyses are filiform, septate, branching.
There is a epithecium which, in water, appears to consist of a brown irregular debris in the mount.
Can anyone place this in a genus? I am uncertain.
Ethan
Hans-Otto Baral,
21-09-2025 16:55
Re : Unknown purple-black asco, long spores, brown epithecium
Hi Ethan,
Uff, this is very interesting. I guess it could be Claussenomyces tympanoides. That species releases a purplish-red pigment when KOH is added to a water mount.
We urgently need a sequence of this species since we have a similar European taxon which seems to be a new species.
How abundant is the sample? If you want to try the KOH reaction (inonomidotic) please use a small apo in order to safe material for DNA.
ZottoÂ