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Spores simple, hialine, guttulate, without perispore, with the following dimensions (some spores within the asci were included in the measurements, these being of larger dimensions):
(14) 16.2 – 20.6 (21) x (6.1) 7.1 – 9.1 (9.6) µm
Q = (1.8) 2 – 2.6 (3) ; N = 29
Me = 18.5 × 8.1 µm ; Qe = 2.3 .
These spores features rule out Porpidia (having spores with perispore) and most of the species of Lecidea as well as of_Lecidella_ .
The British Flora only has a species of Lecidea with spores compatible: L. Phacops (12 – 18(-23) x 5-6 (-7) um), but narrower; Moreover, such species has a red-brown epithecium (which is blue-green in my specimen). The same happens with the genus Lecidella, where only L. meiococca has spores of similar dimensions, but other features, like deeper grey thallus and C+ orange reaction on thallus.
In conclusion … no conclusion!
Created: 2015-09-12 19:21:39 EDT (-0400)
Last modified: 2015-09-13 15:05:06 EDT (-0400)
Viewed: 28 times, last viewed: 2017-02-26 15:23:41 EST (-0500)