Megachile kartaboensis Mitchell, 1930:299, ♀. Holotype ♀, Kartabo, British Guiana, July-August 1920 (M.C.Z., no. 16212, leg. W.M. Wheeler); Raw, 2002Raw, A. 2002. New combinations and synonymies of leafcutter and mason bees of the Americas (Megachile, Hymenoptera, Megachilidae). Zootaxa 71:1-43.:33, Type ♀ (MCZ, 16212); Raw, 2004Raw, A. 2004. Leafcutter and Mason Bees: a biological catalogue of the genus Megachile of the Neotropics. :1-97.:75, Type ♀, examined (MCZ, 16212); Raw, 2007Raw, A. 2007. An annotated catalogue of the leafcutter and mason bees (genus Megachile) of the Neotropics. Zootaxa 1601:1-127.:90, Type ♀, examined (MCZ, 16212); 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.:32, Holotype ♀ (MCZ, 16212). - Raw, 2002Raw, A. 2002. New combinations and synonymies of leafcutter and mason bees of the Americas (Megachile, Hymenoptera, Megachilidae). Zootaxa 71:1-43. (distribution); Raw, 2004Raw, A. 2004. Leafcutter and Mason Bees: a biological catalogue of the genus Megachile of the Neotropics. :1-97. (distribution).