Non- or doubtfully lichenised. Poorly known taxon.
Substrate: bark
Altitudinal distribution: montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)
Note: probably related to N. laburni, doubtfully lichenised, with a thin thallus indicated by grey to blackish patches, depressed to hemispherical, black ascomata (to 0.2 mm in diam.), finally dissolving interascal filaments, 8-spored asci, and hyaline, 1-septate ascospores (13-18 × 4-5 μm); on smooth bark of young branches of Sorbus aria; only known from the type locality in the French Pre-Alps.
