Helicomyces?

Please try to include photos to show all parts of the fungus, eg top, stem, and gills.
Note any smells, and associated trees or plants (eg oak, birch). A spore print can be very useful.
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Steve
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Location: Sheffield, Yorkshire

Helicomyces?

Post by Steve » Mon May 01, 2017 12:57 pm

Hi,
This insignificant little "crust" was spotted on dead ivy wood by Brian Mitchell in our Greno Wood survey. There are a lot of these helicosporous hyphomycetes (71 species in 14 general recorded from one study in China - thanks for the info, Chris). I tentatively assigned this one to Helicomyces as the conidia are coiled in a two-dimensional plane, and so are hard to take photomicrographs of - I have tried to stack a few images. The conidia were up to about 50 um wide, the coiled elements being up to 8 um wide. I think they are septate, but it's difficult to be sure. They look very much like ammonites. I didn't find any conidiophores.
Steve
Attachments
1 Stereo.JPG
Stereo microscope image with mm scale
2 Stereo x45.JPG
Stereo microscope image x45
3 x 200.jpg
Squash in Congo red x 200
4 x 600b.jpg
Single image x600 in Congo Red
5 x x600 (stack).jpg
Stacked image x600 in Congo Red
6 oil.jpg
x1000 in water

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