Megachile orba Schrottky, 1913:214, Raw, 2004Raw, A. 2004. Leafcutter and Mason Bees: a biological catalogue of the genus Megachile of the Neotropics. :1-97.:82, Type ♂ (MZSP); Raw, 2007Raw, A. 2007. An annotated catalogue of the leafcutter and mason bees (genus Megachile) of the Neotropics. Zootaxa 1601:1-127.:100, Type ♂ (MZSP). - 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); Michener, 1954Michener, C.D. 1954. Bees of Panamá. Bulletin of the American Museum of Natural History 104 (1):1-176. (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); Silvestre et al., 2014Silvestre, R., M.F. Demétrio, B.M. Trad, F. Varussa & O. Lima 2014. Diversity and distribution of Hymenoptera Aculeata in Midwestern Brazilian dry forests. In: Greer, F.E. (Ed.). Dry Forests. 29-80. (distribution); Oliveira Lima & Silvestre, 2017Oliveira Lima, F.V. de & R. Silvestre 2017. Abelhas (Hymenoptera, Apidae sensu lato) do Estado de Mato Grosso do Sul, Brasil. Iheringia Série Zoologia 107 (supl.):1-14. (distribution).
Megachile pseudocoelioxys Schrottky, 1920:28, Raw, 2004Raw, A. 2004. Leafcutter and Mason Bees: a biological catalogue of the genus Megachile of the Neotropics. :1-97.:82, Type ♀, examined (MZSP); 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 (MZSP). - Raw, 2004Raw, A. 2004. Leafcutter and Mason Bees: a biological catalogue of the genus Megachile of the Neotropics. :1-97.:82 ( listed as synonym of Megachile orba Schrottky, 1913); Raw, 2007Raw, A. 2007. An annotated catalogue of the leafcutter and mason bees (genus Megachile) of the Neotropics. Zootaxa 1601:1-127.:100 ( listed as synonym of Megachile orba Schrottky, 1913).
Megachile nuda Mitchell, 1930:296, ♀. Holotype ♀, Pedra Branca, Brazil, April (A.N.S.P., no. 4130, leg. H.H. Smith); Raw, 2004Raw, A. 2004. Leafcutter and Mason Bees: a biological catalogue of the genus Megachile of the Neotropics. :1-97.:82, Type ♀ (ANSP, 4130); Raw, 2007Raw, A. 2007. An annotated catalogue of the leafcutter and mason bees (genus Megachile) of the Neotropics. Zootaxa 1601:1-127.:100, Type ♀ (ANSP, 4130). - Raw, 2004Raw, A. 2004. Leafcutter and Mason Bees: a biological catalogue of the genus Megachile of the Neotropics. :1-97.:82 ( listed as synonym of Megachile orba Schrottky, 1913); Raw, 2007Raw, A. 2007. An annotated catalogue of the leafcutter and mason bees (genus Megachile) of the Neotropics. Zootaxa 1601:1-127.:100 ( listed as synonym of Megachile orba Schrottky, 1913).