Dual map lichen
- kingdom: Fungi
- phylum: Ascomycota
- class: Lecanoromycetes
- order: Lecanorales
- family: Rhizocarpaceae
- genus: Rhizocarpon
- species: Rhizocarpon geminatum
Potamiá
East Macedonia and Thrace
Greece
Uummannaq
05
Greenland
Lauterbrunnen
Bern
Switzerland
East Foothills
California
United States
Trosa