Chaenothecopsis viridireagens (Nádv.) A.F.W. Schmidt
Syn.: Calicium viridireagens Nádv.
Non- or doubtfully lichenised.
Substrate: ,
Altitudinal range: from the montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies) to the subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron)
Note: a mainly boreal-montane, perhaps circumpolar species found on decorticated stumps, occasionally on acid bark inside montane and subalpine forests on the thalli of Chaenotheca- and Calicium-species; probably more widespread in the Alps, but never common.
Austria: Vorarlberg; Tirol; Salzburg; Kärnten; Steiermark; Oberösterreich; Niederösterreich (incl. Wien); Germany: Oberbayern; Switzerland: Bern; Graubünden; Schwyz; France: Haute-Savoie; Italy: Friuli;