Halictus sopinci Crawford, 1932:69, Gibbs et al., 2013Gibbs, J., L. Packer, S. Dumesh & B.N. Danforth 2013. Revision and reclassification of Lasioglossum (Evylaeus), L. (Hemihalictus) and L. (Sphecodogastra) in eastern North America (Hymenoptera: Apoidea: Halictidae). Zootaxa 3672 (1):1-117.:56, Holotype ♀, examined (AMNH). - As Lasioglossum sopinci: - Gibbs et al., 2013Gibbs, J., L. Packer, S. Dumesh & B.N. Danforth 2013. Revision and reclassification of Lasioglossum (Evylaeus), L. (Hemihalictus) and L. (Sphecodogastra) in eastern North America (Hymenoptera: Apoidea: Halictidae). Zootaxa 3672 (1):1-117. (distribution); Owens et al., 2018Owens, B.E., L. Allain, E.C. van Gorder, J.L. Bossart & C.E. Carlton 2018. The bees (Hymenoptera: Apoidea) of Louisiana: An updated, annotated checklist. Proceedings of the Entomological Society of Washington 120 (2):272-307. (distribution).
Evylaeus bradleyi Mitchell, 1960:356, Gibbs et al., 2013Gibbs, J., L. Packer, S. Dumesh & B.N. Danforth 2013. Revision and reclassification of Lasioglossum (Evylaeus), L. (Hemihalictus) and L. (Sphecodogastra) in eastern North America (Hymenoptera: Apoidea: Halictidae). Zootaxa 3672 (1):1-117.:56, Holotype ♂, examined (CUIC). - Mitchell, 1960Mitchell, T.B. 1960. Bees of the Eastern United States. Volume I. Technical bulletin (North Carolina Agricultural Experiment Station) 141:1-538. (distribution); Gibbs et al., 2013Gibbs, J., L. Packer, S. Dumesh & B.N. Danforth 2013. Revision and reclassification of Lasioglossum (Evylaeus), L. (Hemihalictus) and L. (Sphecodogastra) in eastern North America (Hymenoptera: Apoidea: Halictidae). Zootaxa 3672 (1):1-117.:56 ( listed as synonym of Lasioglossum sopinci (Crawford, 1932)).