Myriolecis semipallida (H. Magn.) Śliwa, Zhao Xin & Lumbsch

A tiny saxicolous Myriolecis that inhabits various types of calcareous substrates, both natural and anthropogenic ones, from lowlands to mountains. It is one of the typically pioneer lichens but often persist till later succession stages. It is a common species and one of the most common genus members in Europe and in the Czech Republic. However, it probably includes more taxa that differ only in minor characteristics. Even distinguishing the species from the similar M. dispersa can sometimes be difficult because of the altering concentration of xanthones. In the past, both taxa used to be reported under the name Lecanora dispersa.

Ascomycota → Lecanoromycetes → Lecanorales → Lecanoraceae → Myriolecis