Euplusia vidua Moure, 1976 Kimsey & Dressler, 1986Kimsey, L.S. & R.L. Dressler 1986. Synonymic species list of Euglossini. The Pan-Pacific Entomologist 62 (3):229-236.:231, Holotype ♀ (repository unknown); Nemésio & Rasmussen, 2011Nemésio, A. & C. Rasmussen 2011. Nomenclatural issues in the orchid bees (Hymenoptera: Apidae: Euglossina) and an updated catalogue. Zootaxa 3006:1-42.:23, Holotype ♀ (HNHM). - As Eufriesea vidua: - Ramírez et al., 2002Ramírez, S., R.L. Dressler, & M. Ospina 2002. Abejas euglosinas de la Región Neotropical: Listado de especies con notas sobre su biología. Biota Colombiana 3 (1):7-118. (distribution).
Euplusia xantha Kimsey, 1977:17, ♂♀. Holotype ♂, Rockstone, Mazaruni Potaro, Guyana, VIII-10-1970 (USNM, leg. N.H. Williams); Kimsey & Dressler, 1986Kimsey, L.S. & R.L. Dressler 1986. Synonymic species list of Euglossini. The Pan-Pacific Entomologist 62 (3):229-236.:231, Holotype ♂ (Davis); Nemésio & Rasmussen, 2011Nemésio, A. & C. Rasmussen 2011. Nomenclatural issues in the orchid bees (Hymenoptera: Apidae: Euglossina) and an updated catalogue. Zootaxa 3006:1-42.:23, Holotype ♂ (USNM). - Nemésio & Rasmussen, 2011Nemésio, A. & C. Rasmussen 2011. Nomenclatural issues in the orchid bees (Hymenoptera: Apidae: Euglossina) and an updated catalogue. Zootaxa 3006:1-42.:23 ( listed as synonym of Eufriesea vidua (Moure, 1976)). - As Eufriesea xantha: - Bonilla-Gómez & Nates-Parra, 1992Bonilla-Gómez, M.A. & G. Nates-Parra 1992. Abejas euglosinas de Colombia (Hymenoptera: Apidae), I. Claves ilustradas. Caldasia 17 (1):149-172. (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).