Concentric boulder lichen
- kingdom: Fungi
- phylum: Ascomycota
- class: Lecanoromycetes
- order: Lecanorales
- family: Lecideaceae
- genus: Porpidia
- species: Porpidia crustulata
- Austria
Zlaté Hory
Olomoucký
Czech Republic
Balderschwang
Neureichenau
Passau
Sankt Englmar
Bavaria
Nideggen
North Rhine-Westphalia
Bleialf
Mützenich
Oberlascheid
Rheinland-Pfalz
Germany
Szentgotthárd
Vas
Hungary
Predoi - Prettau
Trentino-Alto Adige
Italy
Kuzma
Kuzma
Slovenia
Lauterbrunnen
Bern
Switzerland
Alderney
England
United Kingdom
Chillum
Langley Park
Silver Spring
Takoma Park
Maryland
Echelon
Laurel Springs
Lindenwold
Stratford
New Jersey
Borough of Bronx
Little Falls
New York
Oakridge
Oregon
Pearisburg
Virginia
Bellingham
Long Beach
Washington
United States
Kaisersdorf
Vaggeryd