LICHALP

Verrucaria zschackei Riedl

Syn.: Verrucaria aethiobola Wahlenb. f. calcarea Arnold, Verrucaria calcaria Zschacke non V. calcarea (L.) Humb. nec C. Knight

Lichenised. Poorly known taxon.

Substrate:

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 close to V. hydrela, with a spreading, smooth, glossy thallus which is somewhat rimose around the fruiting bodies, hemispherically protruding ascomata (to c. 0.2 mm in diam.) covered by a thalline layer, involucrellum adpressed to the perithecial wall and reaching down to the base of the perithecium, and ellipsoid ascospores (to c. 20 µm long); on calcareous rocks along streams, widespread in Central Europe, with scattered records from the Alps.