This dataset contains the digitized treatments in Plazi based on the original journal article Müller, Andreas (2018): Palaearctic Osmia bees of the subgenus Hoplosmia (Megachilidae, Osmiini): biology, taxonomy and key to species. Zootaxa 4415 (2): 297-329, DOI: https://doi.org/10.11646/zootaxa.4415.2.4