Centris difformis Smith, 1854:374, Vélez, 2012Vélez Velandia, E.D. 2012. . Dissertation , , 1-247. Bogotá, Colombia.:118, Holotype ♀ (BMNH, 17B.912). - Smith, 1874Smith, F. 1874. A revision of the genera Epicharis, Centris, Eulema, and Euglossa, belonging to the family Apidae, Section Scopulipedes [Continued from p. 322]. The Annals and Magazine of Natural History ser. 4: v. 13:357-373. (distribution); Cresson, 1879Cresson, E.T. 1879. Catalogue of North American Apidae. Transactions of the American Entomological Society and Proceedings of the Entomological Section of the Academy of Natural Sciences 7:215-232. (distribution); Dalla Torre, 1896Dalla Torre, C.G. 1896. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, X. Apidae (Anthophila). Sumptibus Guilelmi Engelmann, 1-643. (distribution); Cockerell, 1899Cockerell, T.D.A. 1899. Catálogo de las Abejas de Mexico. Biblioteca Agricola de las Secretaria de Fomento, Mexico, 1-20. (distribution); Friese, 1900Friese, H. 1900. Monographie der Bienengattung Centris (s. lat.). Annalen des Naturhistorischen Museums in Wien 15:237-350. (distribution); Friese, 1902Friese, H. 1902. Beitrag zur Apidenfauna der grossen Antillen. Zeitschrift für systematische Hymenopterologie und Dipterologie 1-2:196-201. (distribution); Cockerell, 1906Cockerell, T.D.A. 1906. The North American bees of the family Anthophoridae. Transactions of the American Entomological Society 32 (1):63-116. (distribution); Crawford, 1906Crawford, J.C. 1906. Some Costa Rican bees. Transactions of the American Entomological Society 32 (2):157-163. (distribution); Lutz & Cockerell, 1920Lutz, F.E. & T.D.A. Cockerell 1920. Notes on the distribution and bibliography of North American bees of the families, Apidae, Meliponidae, Bombidae, Euglossidae, and Anthophoridae. Bull. Amer. Mus. Nat. Hist 42 (15):491-641. (distribution); Alayo, 1973Alayo, P.D. 1973. Catálogo de los Himenopteros de Cuba. Instituto Cubano del libro, La Habana. 1-218. (distribution); Alayo, 1976Alayo, P.D. 1976. Introducción al estudio de los himenópteros de Cuba. Apoidea. Serie Biológica 68:1- 61. (distribution); Zayas, 1982Zayas, F. de 1982. Sección Oligoneoptera - Orden Hymenoptera - Orden Strepsiptera. Editorial Científico-Técnica, Ciudad de la Habana. 1-111. (distribution); Snelling, 1984Snelling, R.R. 1984. Studies on the taxonomy and distribution of American Centridine bees (Hymenoptera: Anthophoridae). Contributions in Science, Natural History Museum Los Angeles County 347:1-69. (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); Portuondo Ferrer & Fernández Triana, 2004Portuondo Ferrer, E. & J.L. Fernández Triana 2004. Biodiversidad del orden Hymenoptera en los macizos montañosos de Cuba oriental. Boletín de la Sociedad Entomológica Aragonesa 35:121-136. (distribution); Vélez & Vivallo, 2012Vélez, D. & F. Vivallo 2012. A new South American species of Centris (Heterocentris) Cockerell, 1899 with a key to the species with hornlike projections on the clypeus (Hymenoptera: Apidae: Centridini). Zootaxa 3357:49-55. (distribution); Vélez, 2012Vélez Velandia, E.D. 2012. . Dissertation , , 1-247. Bogotá, Colombia. (distribution).