Verrucaria anulata Zschacke

Lichenised. Poorly known taxon.
Substrate: calciferous rocks
Altitudinal distribution: subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron)
Note: a species resembling in habitus V. cincta Hepp, but ascomata larger and ascospores smaller, with a whitish-grey, thin, continuous, wrinkled thallus, black, sessile ascomata (to 1 mm in diam.) with a depressed ostiolar region, surrounded by a thalline ridge, with a well-developed, slightly convex involucrellum, 8-spored asci, and broadly ellipsoid ascospores (16-19 × 11-13 μm); on a calcareous rock at high elevation; only known from the type locality in the Eastern Alps (Switzerland).
Switzerland: Graubünden;