Observation 132024: Xylariales Nannf.


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Ever look at those spores?
By: Roo Vandegrift (Werdnus)
2015-02-15 04:30:57 CST (-0500)

I just remembered how cool it was to see the SEM of the ostioles, and I’m still curious to know what this one is!

Will do!
By: Jeff Hitchcock (JHitch)
2013-04-17 20:02:02 CDT (-0400)

Yep! Still have it, and I will get a picture of the slice up ASAP (as well as trying to get a spore shot). It seemed, at least on the entire section I have mounted for the SEM, that none of the perithecia had opened yet. I should have the micrographs up within the next day or two if I can find any mature spores!

Still have it?
By: Roo Vandegrift (Werdnus)
2013-04-17 14:33:50 CDT (-0400)

I don’t think it’s a Xylaria, Jeff, but the family seems right. There’s not really any crustose Xylarias, but there are some good candidate genera in the Xylariaceae. To me, this looks like a Biscogniauxia, but you can’t really tell with just surface texture. If you’ve still got the specimen, can you slice it vertically and upload a photo of the section? The shape of the perithecia (tubular vs. globose) is really useful. And the spores are really diagnostic: how big are they, how asymmetric, where and how long is the germ slit, etc. I’d recommend the Xylariaceae key here:


There genus keys there too… the Biscogniauxia key is pretty good, as in the Hypoxylon key (though your lovely SEM pictures seem to indicate that this is not a Hypoxylon: there’s no evidence of an annular ring, which most of the black ones have.

Let me know how it goes, and if you put up more pictures! I’m curious to see what this ends up being!

Created: 2013-04-17 12:45:26 CDT (-0400)
Last modified: 2017-07-22 16:01:13 CDT (-0400)
Viewed: 57 times, last viewed: 2018-11-07 07:15:30 CST (-0500)
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