Megachile hamata Mitchell, 1930:295, ♀. Holotype ♀, Rio Frio, Magdalena, Colombia, December 26, 1926 (Salt); Raw, 2002Raw, A. 2002. New combinations and synonymies of leafcutter and mason bees of the Americas (Megachile, Hymenoptera, Megachilidae). Zootaxa 71:1-43.:35, Type ♀ (BNHM, 17a2472); Raw, 2004Raw, A. 2004. Leafcutter and Mason Bees: a biological catalogue of the genus Megachile of the Neotropics. :1-97.:82, Type ♀, examined (NHML, 17a2472); Raw, 2007Raw, A. 2007. An annotated catalogue of the leafcutter and mason bees (genus Megachile) of the Neotropics. Zootaxa 1601:1-127.:100, Type ♀, examined (NHML, 17a2472). - Nates-Parra & González, 2000Nates-Parra, G. & V.H. González 2000. The colombian wild bees: Whay and how to preserve them. Acta biol. Colomb. 5 (1):5-37. (distribution); Raw, 2002Raw, A. 2002. New combinations and synonymies of leafcutter and mason bees of the Americas (Megachile, Hymenoptera, Megachilidae). Zootaxa 71:1-43. (distribution); Smith-Pardo, 2003Smith-Pardo, A.H. 2003. A preliminary account of the bees of Colombia (Hymenoptera: Apoidea): present knowledge and future directions. Journal of the Kansas Entomological Society 76 (2):335-341. (distribution); Raw, 2004Raw, A. 2004. Leafcutter and Mason Bees: a biological catalogue of the genus Megachile of the Neotropics. :1-97. (distribution); Gonzalez et al., 2012Gonzalez, V.H., J.S. Ascher & M.S. Engel 2012. A new Stelis (Dolichostelis) from northern Colombia (Hymenoptera: Megachilidae): first records for South America and a synopsis of the bee fauna from the Caribbean region of Colombia. Journal of Natural History 46 (47-48):2919-2934. (distribution).