LICHALP

Thallinocarpon nigritellum (Lettau) P.M. Jørg.

Syn.: Gonohymenia nigritella (Lettau) Henssen, Lichinella nigritella (Lettau) P.P. Moreno & Egea, Thyrea nigritella Lettau

Lichenised.

Substrate: calciferous rocks, intermediate rocks (such as calciferous schists), siliceous rocks

Altitudinal range: from the submediterranean/colline belt (potential vegetation: mixed deciduous forests dominated by Quercus and Carpinus) to the montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)

Note: a species with a lobed to squamulose thallus forming cushions of c. 2 cm in diam., the lobes black or partly grey-pruinose and with mostly globose isidia, usually sterile; on steeply inclined surfaces of calcareous or base-rich siliceous rocks in shaded situations or on surfaces with water seepage after rain; widespread in the Northern Hemisphere, probably undercollected in the Alps.