Observation 100136: Arthonia Ach.
When: 2012-06-30
Who: zaca
No herbarium specimen

Notes: The macro features and the chemistry of this specimen seem to point to Arthonia pruinata or to a close species, due to less pruina. The form (Arthonia type) and the opening of the asci by a slit-like rupture also agrees with the description given in CNALH for the genus Arthonia, but their sizes (33-57 × 24-36) as well as those of the spores (average Me = 27.5 × 10.7 µm ; Qe = 2.6 (N=9)) are very different than mentioned there for Arthonia pruinata. So, what is this?

Images

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Chemical reactions;
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Microscopy (the photo in the midle-right was obtained after add a drop of Melzer).

Proposed Names

58% (1)
Eye3 Eyes3
Used references: See the Notes.
Based on microscopic features
Based on chemical features

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2012-07-12 16:51:57 PDT (-0700)
Last modified: 2012-07-12 16:52:00 PDT (-0700)
Viewed: 37 times, last viewed: 2015-12-16 22:51:47 PST (-0800)
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