Observation 203976: Miriquidica Hertel & Rambold
When: 2015-05-02
Who: zaca
No herbarium specimen

Notes: Very distinctive crustose lichen, growing on siliceous rock, whose thallus is surrounded by that Rhizocarpon bolanderi (I believe); Curiously its thallus is of the same type than the Rhizocarpon (mainly constituted by squamules) but has different apothecia.

Images

519747
558157
Other specimen nearby;
558158
Other specimen nearby;
558159
Microscopy: Sections;
558160
Microscopy: A thinner section, epithecium and exciple;
558161
Microscopy: Asci;
558162
Microscopy: Spores and paraphyses.

Proposed Names

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Recognized by sight
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Comments

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New specimens and new data added.
By: zaca
2015-09-23 10:06:37 CDT (-0500)

In the sequel of the conclusions got for observation 203979, I also tryed the microscopy of this specimen. By comparison of the microscopic results, seems clearly that it can also belong to the same genus – Miriquidica, if not of the same species; the sections are of the same type and the spores also are simple and hialine, now with the following dimensions:
(10.2) 10.7 – 13.9 (14.4) x (4.5) 4.8 – 5.8 (6) µm
Q = (1.8) 2 – 2.7 (3.1) ; N = 23; Me = 12.2 × 5.2 µm ; Qe = 2.4 .
However, in the first photo the morphological features seem to be a bit different here: the pruinose apothecia are more or
less concolour with the areolate brown thallus, which is not squamulose (at least away from the margin), and the margin of
apothecia is only slightly paler than the disc. But, the other photos just uploaded also show that the thallus can be of squamulose type like in observation 203979 and the apothecia still pruinose, seeming to be concolour with the thallus.
Therefore, I think this is also Miriquidica and maybe also M. deusta.
Of course, all this can be a wishful thinking!

Created: 2015-05-06 16:47:48 CDT (-0500)
Last modified: 2015-09-23 17:40:25 CDT (-0500)
Viewed: 43 times, last viewed: 2016-10-21 05:18:52 CDT (-0500)
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