Clauzadeana macula (Taylor) Coppins & Rambold Cf.
Thallus crustose, tightly appressed, areolate, areoles to 0.2-1 mm, more or less contiguous and squamulose-like in some areas, angular, plane or convex, bright, brown, dark brown, prothallus conspicuous potentially preponderant, black, blackish. Apothecia inconspicuous, 0.1-0.3 mm diam., immersed in the areoles, disc brown-black, blackish, exciple paler but indistinct (somewhat resembling to the Acarospora), Ascospores simple, ellipsoid, 8-12 x 4-6 µm. Chemical spot tests negative. Photobiont: Chlorococcoid. Rare lichenicolous species, montane trends, grows nearby the thalli of coloured Rhizocarpons on siliceous rocks. Here, nearby the thallus of Rhizocarpon viridiatrum. See some morphs of Schaereria fuscocinerea that shares the same habitat and may grow nearby, but less brownish and C+ pink-red. N.B. Provisional identification, the samples being infertile.