Beih. Nova Hedwigia 79: 317 (1984)
Basionym: Lecidea opaca Fr., Lichenogr. Europ. Reform.: 289 (1831).
Synonym: Index Fungorum
Type: France, "in rupibus alpinis Galliae", leg. Dufour. Department and even region unclear. Material not located, not found in Uppsala, Sweden (UPS) by Schneider (1979: 64).
Thallus:
Chemistry: Erythrin (Galun 1970), Fragilin, 7-chloroemodin, 1-O-methylfragilin [as "2-chloro-1-hydroxy-3.8-dimethoxy-6-methylanthrachinon"], 1,6,8-trihydroxy-3-methyl-7-chloro-9-anthrone [as "2-choro-1.2.3.-trihydroxy-6-methyl-10-anthron"] (Steiner et al. 1974), rhizocarpic acid (Schneider 1979: 64).
Ecology:
Molecular data:
Distribution: Database
Note: Authors: Placolecis opaca (Dufour) Hafellner in IF/IS or (Dufour ex Fr.) Hafellner in ?