Literature
- Ascher, J.S. and Pickering, J. 2014. Discover Life bee species guide and world checklist (Hymenoptera: Apoidea: Anthophila). Available at: http://www.discoverlife.org/mp/20q?guide=Apoidea_species&flags=HAS:&guide=Apoidea_species&cl=EI.
- Dewulf, A. & Praz, C. 2014. Megachile semicircularis. The IUCN Red List of Threatened Species 2014: e.T19198908A50142482. http://dx.doi.org/10.2305/IUCN.UK.2014-3.RLTS.T19198908A50142482.en. Downloaded on 11 April 2019.
- Nieto, A., Roberts, S.P.M., Kemp, J., Rasmont, P., Kuhlmann, M., García Criado, M., Biesmeijer, J.C., Bogusch, P., Dathe, H.H., De la Rúa, P., De Meulemeester, T., Dehon, M., Dewulf, A., Ortiz-Sánchez, F.J., Lhomme, P., Pauly, A., Potts, S.G., Praz, C., Quaranta, M., Radchenko, V.G., Scheuchl, E., Smit, J., Straka, J., Terzo, M., Tomozii, B., Window, J. and Michez, D. 2014. European Red List of bees. Luxembourg: Publication Office of the European Union.