Observation 278523: Lecanoromycetes

When: 2017-06-08

Collection location: Uintah Co., Utah, USA [Click for map]

40.5431°N 109.5547°W 1766m [Click for map]

Who: Tobias (T.Hays)

No specimen available

Endolithic lichen found growing on northwest facing sandstone ledge face, on exposed surface in some direct sunlight. Only three thalli were present, lichen seems to be relatively uncommon. Thallus is not obvious at all, and lichen form consists of a smooth grey area of sandstone forming dark borders with other crustose species and holding numerous red apothecia. Apothecia are generally 1 mm in diameter with a thick lecanorine margin; color is dull red when dry and bright red when wet, with center of disk being white, pruinose and frequently cracked. Photobiont appears to be Trebouxia.


Apothecia close up.
Gray sandstone area of thallus with apothecia.
Algal cell from apothecium.
These are the closest things I could find resembling spores from an apothecium.

Proposed Names

76% (1)
Recognized by sight
28% (1)
Recognized by sight

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Add Comment
Never seen anything like this
By: Jason Hollinger (jason)
2017-07-29 18:53:26 EDT (-0400)

Are you sure that is a lecanorine margin? That is, are you sure it is filled with algae? This looks more like a biatorine / lecideine margin to me. I’m wondering about Sarcogyne or possibly one of the many non-orange Caloplaca. I don’t suppose you had any luck finding spores? The most helpful things you can do to take this further are getting a photo of a nice clean vertical section of the apothecium showing the anatomy of the margin, hypothecium, etc. And find some mature spores. This specimen might also need an ascus stain, but we can cross that bridge when we get to it!

Created: 2017-06-09 15:08:11 EDT (-0400)
Last modified: 2017-07-30 05:10:44 EDT (-0400)
Viewed: 53 times, last viewed: 2019-08-13 08:10:07 EDT (-0400)
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