Rinodina terrestris Tomin

This terricolous species has a grey thallus, crowded lecanorine apothecia with a black disc and thalline margin and large spores (22–30 × 8–12 µm) with elongated pale ends. It grows on plant debris, bryophytes or directly on soil in open grasslands, usually in continental steppe areas. It prefers calcareous substrates, such as loess. It is quite common in some areas from eastern Europe to central Asia, but surprisingly absent from the Mediterranean. In central Europe, R. terrestris is very rare, with a relic distribution. It can only be found in localities with a strongly continental climate, such as certain valleys in the Alps. The single Czech record is from south Moravia, from loess near the village Čejč (collected in 1971 by Vězda, published as exsiccate named R. mucronatula). There are no recent records, but its occurrence on exposed loess cannot be ruled out.

Ascomycota → Lecanoromycetes → Caliciales → Physciaceae → Rinodina