Verhand. Zool.-Bot. Gesellsch. Wien 26: 438 (1876).
Type: Peru, Lima, on rock, H. Wawra 2553 (W - holotype).
Thallus: rigid, erect, up to 3 cm long, sparingly to moderately branched from a common holdfast. Branches solid, lanceolate, plane, thick, 2 - 9 mm wide, 0.1 - 0.5 - 0.8 mm thick; surface flat of more or less uneven with age, pseudocyphellate. Pseudocyphellae ellipsoid to linear, laminal, plane in young branches, moderately or conspicuously protrudes in older branches. Thallus 150 - 400 - 700 µm thick; cortex indistinct; chondroid tissue continuous, not-cracked, never forming bundles of hyphae; medulla thick, continuous, dense. Apothecia common, stipitate, laminal; disc heavily pruinose, with white pruina, plane to concave; thalloid exciple thick, pseudocyphellate; ascospores ellipsoid, 2-celled, often 4-celled with additional septa, 14 - 16 / 4 - 5 µm (Kashiwadani 1987: 133).
Photobiont:
Chemistry:
Ecology: Saxicolous.
Race I: Usnic acid, sekikaic acid, 4'-0-demethylsekikaic acid (Kashiwadani 1987: 133).
Race II: Usnic acid, sekikaic acid, 4'-0-demethylsekikaic acid, norstictic acid, fumarprotocetraric acid and salazinic acid (Kashiwadani 1987: 133).
Race III: Usnic acid (Kashiwadani 1987: 133).