Knudsen, K., Kocourková, J., Pušová, T., Kondrysová, E. and Malíček, J. 2026. A study of Acarospora nitrophila, a rare and misunderstood lichen species, and the sister species A. praeruptorum (Acarosporales, Lecanoromycetes). Folia Cryptogamica Estonica. 63, (Apr. 2026), 25–36. DOI:https://doi.org/10.12697/fce.2026.63.03.