LICHALP

Protothelenella corrosa (Körb.) H. Mayrhofer & Poelt

Syn.: Acrorixis corrosa (Körb.) Trevis., Limboria corrosa Körb., Microglaena corrosa (Körb.) Arnold, Microglaena gibbosula (Nyl.) Blomb. & Forssell, Microglaena nericiensis Hellb., Polyblastia arenaria (Hampe) Jatta, Thelenella corrosa (Körb.) Vain.

Lichenised.

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 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-alpine to boreal-montane, probably circumpolar lichen found on slightly calciferous rocks, especially near creeks and lakes, on boulders and pebbles near the ground; much overlooked and certainly more widespread in the Alps, with optimum above treeline.