Clavascidium lacinulatum (Ach.) M. Prieto var. atrans (Breuss) M. Prieto
Syn.: Placidium lacinulatum (Ach.) Breuss var. atrans Breuss
Lichenised. Poorly known taxon.
Substrate: calciferous soil
Altitudinal distribution: montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)
Note: a variety with dark perithecial walls, based on a type from Eastern North America, where it grows on soil over ophiolitic rocks; in the Alps only known from a single locality over calcareous soil; on the whole an insufficiently known taxon in need of critical re-evaluation.
