Description: This is a rather poorly-known species and current concepts now agree that this is a montane taxon found growing on leafy liverworts. The thallus is inconspicuous but the discs turn blue-green when moistened; it is almost black when dry. The simple spores are within the range 16–23 x 8–12µm. In Ireland, the species is known from County Donegal.

Key Identification Features:

• Thallus inapparent, discs blue-green when wet or moist, but black when dry
• Spores simple; a montane lichen of leafy liverworts.

Original text submitted by Vince J. Giavarini

Distribution Map from NBN: Mniaecia jungermanniae at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Mniaecia jungermanniae at iNaturalist World Species Observations database.