LICHALP

Schaereria parasemella (Nyl.) Lumbsch

Syn.: Hafellnera parasemella (Nyl.) Houmeau & Cl. Roux, Lecidea parasemella Nyl.

Lichenised.

Substrate: plant debris, living mosses

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: an arctic to nemoral-alpine species with a thin greyish thallus, blackish-brown, sessile apothecia with a thalline margin and a a cupulate proper exciple, a green epihymenium, cylindrical asci ,and broadly ellipsoid to subglobose, halonate ascospores; on plant debris overgrown by crustose lichens (mainly Biatora vernalis) over acid substrata; rare, with very few scattered records from the Alps.