Caloplaca nideri J. Steiner

Lichenised.
Substrate: calciferous rocks
Altitudinal distribution: submediterranean/colline belt (potential vegetation: mixed deciduous forests dominated by Quercus and Carpinus)
Note: a species with an orange thallus of c. 2 cm diam. (recalling C. flavescens), the lobes c. 1 mm wide, more or less concolorous apothecia, and ellipsoid ascospores with rather thin septa; a mainly eastern Mediterranean, calcicolous species based on a type from Greece; in the Alps so far only known from a single lowland locality close to the eastern border.
Austria: Niederösterreich (incl. Wien);