Addenda and corrigenda: Juřena D (2022) A critical review of the distribution of the endangered European earth-borer beetle Bolbelasmus unicornis (Coleoptera, Geotrupidae), with new records from 13 countries and observations on its bionomy. ZooKeys 1105: 1–125. https://doi.org/10.3897/zookeys.1105.81474

The author provides corrections of minor errors and omissions from his initial study, as well as data from omitted and new literature, and new records based on the material studied and new observations. For some of the previously published records, details obtained subsequently by the author are added. The first record of Bolbelasmus unicornis for Belarus is given, representing the northernmost known occurrence of the species. The second recent record for Croatia is quoted from an internet source. Updated distribution maps are provided for the Czech Republic and Slovakia, and for the entire range, as well as a distribution map of the Western Palaearctic representatives of the B. unicornis species group. The species is currently known from 386 localities in 20 countries.