Verrucaria dalslandensis Servít

Lichenised.
Substrate: siliceous rocks
Altitudinal distribution: montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)
Note: a species resembling V. muralis, with a thin, epilithic, uncracked to rimulose, brownish to grey thallus with a reddish tinge, hemispherically protruding ascomata (to 0.25 mm in diam.) with adpressed involucrellum reaching down to the base of the perithecium, and oblong ascospores (to c. 20 µm long); on schists and similar acidic substrata; a rarely reported species, but apparently with a wide distribution in Europe, including the Eastern Alps (Austria).
Austria: Tirol;