Willdenowia 5, 3: 375 (1969).

Basionym: Lecidea stigmatea Ach., Lich. Univ. 10 (1810).

Type: Switzerland, Habitat ad lapides silaceos Helvetiae, J. C. Schleicher (H-ACH - lectotype, designated by Hertel 1970, UPS - isotype 349).

Chemistry: Always with Zeorin, in addition either Atranorin or Lichexanthon (Leuckert & Poelt 1978: 57).
Race I: Atranorin, zeorin, rarely additional lichexanthone or norlichexanthone (Knoph & Leuckert 1994: 496).
Race II: Zeorin (Knoph & Leuckert 1994: 496).
Race III: Zeorin, lichexanthone (Knoph & Leuckert 1994: 496).