Jørgensen, P. M., Schultz, M. & Guttová, A. 2013: Validation of Anema tumidulum (Lichinaceae, lichenized Ascomycota), a widespread cyanophilic lichen. — Herzogia 26: 1–7.
Anema tumidulum Henssen nom. nud. is validated by a formal description. The species is shown to be widespread in Europe. Most records come from Central Europe and Norway, but the species might still be under-collected in other regions. It is confined to calcareous habitats, sporadically moistened, sunny, open calcareous rock faces in thermophilous, mountainous situations. A list of selected examined specimens is presented. A first finding for Kazakhstan is published, whereas a published report from eastern Siberia (Russia) is shown to be based on a misidentification.