Altitudinal range: from the subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron) to the alpine belt (potential vegetation: treeless Alpine grasslands and tundras, to the lower limit of perennial snow and the equilibrium line of glaciers)
Note: only known from the type collection, on granite, this species is likely to be closely related to, or a synonym of Protothelenella sphinctrinoides, but was forgotten because of the unavailability of the type, which is most probably in MOD (see Nimis 1993: 559).
