Thallus small, lobate-squamulose, closely attached, saxicolous, to 2 cm diam., with a conspicuous, marginal, black prothallus. Squamules laciniate-linear, short, narrow, 0.1-0.3 mm wide, margins flexuous, crenate, ± bifurcate. Upper surface smooth, matt, yellowish-grey, without isidia or soredia. Lower surface black, rhizinate. Rhizines thick, black, visible as a prothallus between laciniae and at margins. Apothecia sessile, rounded, to 1 mm diam., disc plane, waxy, yellow-brown to red-brown with a pale proper margin, thalline margin thick, crenate, flexuose, obscuring disc in young fruits. Ascospores oval, oval-oblong to fusiform, 8-9 × 3-3.5 µm.

Thallus squamulose, orbicular to spreading, to 10 cm diam., corticolous, muscicolous or saxicolous, with a ± conspicuous, marginal black prothallus. Squamules closely attached, entire, well-developed at margins becoming areolate-cracked centrally, ± rosette-shaped with crenate margins, to highly dissected to sublobulate, imbricate and ± loosely attached, clustered on a dense, black prothallus, occasionally ascending or ± coralloid. Upper surface pale greyish-blue to dark grey or brownish-black, smooth or slightly wavy, without isidia or soredia. Apothecia frequent, sessile, to 1.5 mm diam., solitary or confluent, disc plane, yellowish to red-brown or blackened, ± waxy, distinctly gyrose-etched, dark or ± perforate centrally, often with thalline lobules, proper margin pale, thin, thalline margin crenulate, incised or sublobulate, inflexed. Ascospores ellipsoid-ovoid 10-16 × 4-6(-9) µm wall 0.5-2 µm thick.