Observation 165645: Arthonia leucopellaea (Ach.) Almq.
When: 2014-03-30
Who: zaca
No herbarium specimen

Notes: This specimen shares the habitat with the Schismatomma considered in observation 165636. Its main features are:
- Thallus scurfy, cream with a pink tinge;
- Apothecia lirellate, very dark, with a raised white thalline rim, strongly white pruinose;
- Photobiont a Trentepohlia sp.;
- Asci characteristic of most species in the genus with average dimensions: Me = 46.5 × 16.7 um ; Qe = 2.8(N=18);
- Spores hialines, small, 3 to 4 septate, oblong-ovoid, the upper cell not enlarged, with the following average dimensions: Me = 14.4 × 5.7 um ; Qe = 2.5 (N=22).
This is another species I observed here for the first time and its name came from a straighforward application of the key for the genus Arthonia in the Bristish Flora.

Images

421674
421671
Chemical reactions;
421672
Microscopy 1: Asci;
421673
Microscopy 2: Asci, spores and photobiont.

Proposed Names

86% (1)
Eye3 Eyes3
Used references: British Flora: Smith et al. (Editors), The Lichens of Great Britain and Ireland, Bristish Lichen Society, 2nd edition 2009.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2014-05-20 18:48:09 EDT (-0400)
Last modified: 2014-05-20 18:55:22 EDT (-0400)
Viewed: 27 times, last viewed: 2015-10-09 04:41:52 EDT (-0400)
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