Megachile aegra Mitchell, 1930:283, ♂. Holotype ♂, Chapada, Brazil, October (A.N.S.P., no. 4137, leg. H.H. Smith); Mitchell, 1935Mitchell, T.B. 1935. A revision of the genus Megachile in the Nearctic Region. Part II. Morphology of the male sternites and genital armature and the taxonomy of the subgenera Litomegachile, Neomegachile and Cressoniella (Hymenoptera: Megachilidae). Transactions of the American Entomological Society 61 (1):1-44.:41, Type ♂ (A.N.S.P., no. 4137); Raw, 2002Raw, A. 2002. New combinations and synonymies of leafcutter and mason bees of the Americas (Megachile, Hymenoptera, Megachilidae). Zootaxa 71:1-43.:26, Type ♂ (ANSP, 4137); Raw, 2007Raw, A. 2007. An annotated catalogue of the leafcutter and mason bees (genus Megachile) of the Neotropics. Zootaxa 1601:1-127.:68, Type ♂ (ANSP, 4137). - Mitchell, 1930Mitchell, T.B. 1930. A contribution to the knowledge of Neotropical Megachile with descriptions of new species (Hymenoptera: Megachilidae). Transactions of the American Entomological Society 56 (3):155-305. (distribution); Mitchell, 1935Mitchell, T.B. 1935. A revision of the genus Megachile in the Nearctic Region. Part II. Morphology of the male sternites and genital armature and the taxonomy of the subgenera Litomegachile, Neomegachile and Cressoniella (Hymenoptera: Megachilidae). Transactions of the American Entomological Society 61 (1):1-44. (distribution); Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209. (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); Raw, 2004Raw, A. 2004. Leafcutter and Mason Bees: a biological catalogue of the genus Megachile of the Neotropics. :1-97. (distribution); Raw, 2007Raw, A. 2007. An annotated catalogue of the leafcutter and mason bees (genus Megachile) of the Neotropics. Zootaxa 1601:1-127. (distribution); Nava-Bolaños & Osorio-Olvera, 2022Nava-Bolaños, A. & L. Osorio-Olvera 2022. Estado del arte del conocimiento de biodiversidad de los polinizadores de México. Revista Mexicana de Biodiversidad 93:1-77. (distribution).