Megachile moderata Smith, 1879:74, Gonzalez et al., 2018Gonzalez, V.H., T. Griswold & M.S. Engel 2018. South American leaf-cutter bees (genus Megachile) of the subgenera Rhyssomegachile and Zonomegachile, with two new subgenera (Hymenoptera: Megachilidae). Bulletin of the American Museum of Natural History 425:1-73.:52, Holotype ♀, examined (BMNH, 17A.2430). - Gonzalez et al., 2018Gonzalez, V.H., T. Griswold & M.S. Engel 2018. South American leaf-cutter bees (genus Megachile) of the subgenera Rhyssomegachile and Zonomegachile, with two new subgenera (Hymenoptera: Megachilidae). Bulletin of the American Museum of Natural History 425:1-73. (distribution); Guevara et al., 2022Guevara, D.A., R. Ospina-Torres, V.H. Gonzalez 2022. New records of megachilid bees (Hymenoptera: Megachilidae) for Colombia. Revista Peruana de biología 29 (4):1-6. (distribution).
Megachile mariannae Dalla Torre, 1896:438, no descr. Replacement name for Megachile moderata Smith, 1879 by Dalla Torre, 1896Dalla Torre, C.G. 1896. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, X. Apidae (Anthophila). Sumptibus Guilelmi Engelmann, 1-643.:438 (nec Smith). - Dalla Torre, 1896Dalla Torre, C.G. 1896. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, X. Apidae (Anthophila). Sumptibus Guilelmi Engelmann, 1-643. (distribution); Gonzalez et al., 2018Gonzalez, V.H., T. Griswold & M.S. Engel 2018. South American leaf-cutter bees (genus Megachile) of the subgenera Rhyssomegachile and Zonomegachile, with two new subgenera (Hymenoptera: Megachilidae). Bulletin of the American Museum of Natural History 425:1-73.:52 ( listed as synonym of Megachile moderata Smith, 1879).