Lichenologist 28, 5: 395 (1996).

Protolog type data: Typus: Portugal, Algarve, NW of Sagres, S of road to Cabo de São Vicente, a coastal plain with exposed calcareous outcrops, on an unidentified shrub, c. 50 m, 22 July 1993, P. P. G. van den Boom 14609 (GZU - holotypus; B, BCC, MUB and hb. v.d. Boom, isotypi).

Type locality: Portugal, Algarve, NW of Sagres, south of road to Cabo de São Vicente, a coastal plain with exposed calcareous outcrops, on an unidentified shrub, ca. 50 m, 22 July 1993, P. P. G. van den Boom 14609 (GZU - holotype; B, BCC, MUB, van den Boom - isotypes).

Type locality coordinates: 37°0'23"N, 8°56'21"W; 37.006389°, -8.939167°.

Molecular barcode: Data lacking.

Thallus: crustose, consisting of closely scattered to contiguous areoles, upper surface of areoles verrucose or granular-verrucose, granules (0.05-)0.1-0.2 mm wide and sometimes flattened, grey to greyish-brown, matt. Areoles angular, 0.3-1(-1.5) mm diam., covered with minute hairs arising from the granules. Hairs 30-60 x 5-7(-8) µm, simple to branched, straight or slightly curved, cellular, hyaline, with +granulate surface, with a distinct, strongly gelatinized wall below, becoming thinner walled above and tapering to a point. Thallus in section, up to 300 µm high. Cortex prosoplectenchymatous,up to .