Placidium lachneum
- kingdom: Fungi
- phylum: Ascomycota
- class: Eurotiomycetes
- order: Verrucariales
- family: Verrucariaceae
- genus: Placidium
- species: Placidium lachneum
Visby
Gotland
Sweden
Alderney
England
United Kingdom
Grand Canyon Village
Arizona- Calico Rock
Arkansas- Zion
Illinois- Cross Mountain
Texas
United States