Muellerella pygmaea explained

Muellerella pygmaea is a species of lichenicolous fungus in the family Verrucariaceae. It has a cosmopolitan distribution in Arctic-alpine areas and grows on the thallus and apothecia of a number of hosts.

Host species for Muellerella pygmaea include:

• Acarospora sp.
• Acarospora smaragdula
• Aspicilia calcarea
• Candelariella aurella
• Carbonea assentiens
• Lecanora alpigena
• Lecanora muralis
• Lecanora polytropa
• Lecidea grisella
• Lecidea lapicida
• Lecidea obluridata
• Tephromela atra
• Rhizocarpon geographicum
• Rusavskia elegans