Nova Hedwigia 92: 96 (2011).

Protolog: Sicut Lepraria isidiata sed thallus tenuissimus, acidum lecanoricum, acidum gyrophoricum, antraquinones continens et acidum fumarprotoceraricum absente differt. Typus: Macaronesian Region, Madeira Island, E part, Ponte de S. Lourenco Marconi, near the sea, on soil and humus over rock, 17 November 1975, L.-Å. Gustafsson (S L42683-holotypus!).

Type locality: Portugal, Madeira, E part, S. Lourenco Marconi - bridge, near the sea, on soil and humus over rock, ca. 20 m, 17 November 1975, L.-Å. Gustafsson (S L42683 - holotype).

Chemistry: Atranorin (major), lecanoric acid (major), angardianic acid / roccellic acid (major), gyrophoric acid (minor), unidentified anthraquinone (minor), and trace of unknown substance detected (Flakus & Kukwa 2011: 96).