This slug species is endemic to north Italy and south Switzerland: Monte Generoso and Baraghetto peaks, east and west slopes, between Lake Como and Lugano lake.
Sambucus nigra | Centaurea nigra | Pinus nigra | Juglans nigra | Fraxinus nigra | Carex nigra | Brassica nigra | Populus nigra | Tinea nigra | Tandonia | Prosopis nigra | Porta Nigra | ''Populus nigra'', originating in the United States from plantings by André Michaux | M. nigra | Mined leaf of ''Centaurea nigra | Leaf of ''Ballota nigra | Hoplocorypha nigra | Gila nigra | Betula nigra | A shoot of ''Centaurea nigra |