Observation 109007: Fuscidea lightfootii (Sm.) Coppins & P. James
When: 2012-09-07
Who: zaca
No herbarium specimen

Notes: Firstly I made the identification of the species without recourse to microscopy: Fuscidea lightfootii. I was fairly confident about it, based in the descriptions and the photos that I saw. Then passed to microscopy and aparently something didn’t match because the spores seemed to be septate whereas in the description they where described as simples. A further look to the descriptions convinced me that everything worked: indeed, the spores present two vacuoles and are constricted in the midle, so appearing septate (mainly when observed with a bad equipment like mine). The spores are hialine, very small (I could measured a few with ~ 9 × 4 µm) and live in groups of 8 on asci of Fuscidea type, exhibiting an intense IKI+ blue reaction on the tholus (apical dome).

Proposed Names

58% (1)
Eye3 Eyes3
Used references: Irish lichens, bioimages, myspecies;
Smith et al., The Lichens of Great Britain and Ireland, The British Lichen Society, 2009.
Based on microscopic features
Based on chemical features

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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You can see it really well in one of the photos
By: Jason Hollinger (jason)
2012-09-07 19:57:37 CDT (-0400)

on myspecies gallery, as well. It’s especially tough when they’re so small.

Re: Tricky!
By: zaca
2012-09-07 19:27:11 CDT (-0400)

The spores seem septate to me. Only now I realize that the photo with the microscopy is missing. I will upload it now.

By: Jason Hollinger (jason)
2012-09-07 19:16:13 CDT (-0400)

Those totally look septate to me, as well. I would’ve been fooled, too. Nicely done.

Created: 2012-09-07 18:14:32 CDT (-0400)
Last modified: 2012-09-07 18:16:12 CDT (-0400)
Viewed: 38 times, last viewed: 2016-10-22 09:31:39 CDT (-0400)
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