Here it was found growing on the upper surface of a flat granitic boulder on an alpine ridge at an altitude of 460 m (1,510 ft).

[1] The thallus of Miriquidica gyrizans has no definite boundaries, consisting of areoles (small, rounded to polygonal or irregular areas) that are either contiguous or dispersed.

These areoles, which measure 0.1–0.2 mm across, are pale brown with a layer of dead fungal cells that imparts a grey tinge.

The mycobiont partner of the lichen is chlorococcoid (i.e. green algae with a spherical shape), with dimensions of 5‒9 μm in diameter.

[1] The results of standard chemical spot tests are negative with this lichen, but miriquidic acid can be detected using thin-layer chromatography.