Muellerella pygmaea
- kingdom: Fungi
- phylum: Ascomycota
- class: Eurotiomycetes
- order: Verrucariales
- family: Verrucariaceae
- genus: Muellerella
- species: Muellerella pygmaea
Großkirchheim
Sittersdorf
Carinthia
Thurn
Tyrol
Gallneukirchen
Zwettl an der Rodl
Upper Austria
Schruns
Vorarlberg
Austria
Neureichenau
Bavaria
Haiger
Hesse
Germany
Ludvika
Dalarna
Sweden
Idyllwild
Idyllwild-Pine Cove
California
Camden
Maine
United States