Published as part of Ghisbain, Guillaume, Rosa, Paolo, Bogusch, Petr, Brau, Thomas, Carion, Fré-Déric, Manincor, Natasha De, Devalez, Jelle, Dorchin, Achik, Flaminio, Simone, Greil, Henri, Hölzler, Gerald, Hopfenmül-Ler, Sebastian, Kasparek, Max, Kuhlmann, Michael, Divelec, Romain Le, Lit-Man, Jessica, Maugendre, Anatole, Michez, Denis, Müller, Andreas, Ortiz-Sánchez, Francisco Javier, Praz, Christophe, Radchenko, Vladimir G., Rasmont, Pierre, Risch, Stephan, Roberts, Stuart P. M., Santerre, Rémi, Schmid-Egger, Chris-Tian, Sentil, Ahlam, Straka, Jakub, Williams, Paul H., Wood, Thomas J. & Reverté, Sara, 2025, The new annotated checklist of the wild bees of Europe (Hymenoptera: Anthophila) - version 2025, pp. 1-126 in Zootaxa 5736 (1) on page 29, DOI: 10.11646/zootaxa.5736.1.1, http://zenodo.org/record/18021087

Hylaeus (Hylaeus) mariannae Theunert, 2013 This taxon was recently synonymised with Hylaeus angustatus (Schenck, 1861) by Dathe (2023). As mentioned in Ghisbain & Rosa et al. (2023), this taxon requires a more in-depth study. Examination of more extensive material and DNA barcoding suggest that it is a distinct species (Le Divelec, unpublished). Therefore, we decide to not follow the recent synonymization of Dathe (2023) and continue to treat H. mariannae as a distinct species.