Lecanora sororia Bagl. & Carestia

Lichenised. Poorly known taxon.
Substrate: siliceous rocks
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 species of uncertain affinity, with a verrucose-areolate, whitish-grey, K+ red thallus of minute, bullate areolae on a dark grey to black hypothallus, sessile apothecia with a brownish red, grey-pruinose disc and a thin thalline margin, thread-like, conglutinate paraphyses, a pale yellow epiphymenium, 8-spored asci, and uniseriate, ellipsoid ascospores measuring 20-30 × 10-12 µm; only known from the type collection, on gneiss; the type material would be well worthy of further study.
Italy: Piemonte;