LICHALP

Biatorella fossarum (Dufour ex Fr.) Arnold.

Syn.: Biatora rousselii (De Not.) Durieu & Mont., Biatorella rousselii De Not., Lecidea fossarum Dufour ex Fr.

Lichenised. Poorly known taxon.

Substrate:

Altitudinal range: from the mesomediterranean belt (potential vegetation: evergreen broad-leaved forests dominated by Quercus ilex) to the montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)

Note: closely related to B. hemisphaerica; on slightly calciferous, often strongly decalcified soil in rather disturbed habitats; chiefly southern in Europe, with a few scattered records from the Alps.