Synonyms: Aspicilia cinerea var. chiodectonoides Anzi; Lecanora valpellinensis (B. de Lesd.) Zahlbr.
Distribution: N - Lomb, VA (Piervittori & Isocrono 1999).
Description: Thallus crustose, episubstratic, rimose-areolate, 0.2-0.5 mm thick, pale ash-grey, sometimes with a bluish tinge. Areoles 0.7-1(-1.5) mm wide, flat, angular, separated by narrow cracks, the fertile ones somewhat larger and sometimes slightly prominent. Cortex dark brown in upper part, colourless in lower part; medulla white, I-; algal layer not extending below the hypothecium. Apothecia lecanorine-aspicilioid, immersed in the areoles, rarely solitary or 2-3, usually 5-15 per areole, punctiform to irregular in outline, 0.1-0.3 mm across, with a black disc and a thin, often indistinct thalline margin. Epithecium greenish to olive-brownish, N+ emerald green; hymenium colourless, 110-120 µm high, 1+ blue turning reddish; paraphyses submoniliform, the apical cells to 2.5 µm wide; hypothecium colourless, inspersed with oil droplets, 35-50 µm high. Asci 8-spored, cylindrical-clavate. Ascospores 1-celled, hyaline, broadly ellipsoid, 17-27 x 9-15 µm. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C-, KC-, P-. Chemistry: unknown, probably without lichen substances.
Note: a very poorly known species (see Nimis 1993: 106), found on calciferous schists, only known from the Alps (Scandinavian material belongs to A. supertegens: Nordin in litt.). Indicator values are tentative.