Halictus cyanonigrans Vachal, 1904:19, Rasmussen, 2012Rasmussen, C. 2012. Joseph Vachal (1838–1911): French entomologist and politician. Zootaxa 3442:1-52.:24, n♂, 2♀ (MNHN). - Rasmussen, 2012Rasmussen, C. 2012. Joseph Vachal (1838–1911): French entomologist and politician. Zootaxa 3442:1-52.:24 ( listed as synonym of Pseudaugochlora sordicutis (Vachal, 1904)). - As Oxystoglossa nigromarginata cyanonigrans: - Alfken, 1935-1936Alfken, J.D. 1935-1936. Ueber eine Bienenausbeute aus Venezuela. Veröffentlichungen aus dem Übersee-Museum Bremen 1:316-320. (distribution).
Halictus sordicutis Vachal, 1904:16, Rasmussen, 2012Rasmussen, C. 2012. Joseph Vachal (1838–1911): French entomologist and politician. Zootaxa 3442:1-52.:45, Holotype ♀ (MNHN). - As Pseudaugochlora sordicutis: - Imperatriz-Fonseca et al., 2011Imperatriz-Fonseca, V.L., I. Alves-dos-Santos, P. Souza Santos-Filho, W. Engels, M. Ramalho, W. Wilms, J.B Vicentin Aguilar, C.A. Pinheiro-Machado, D. Araújo Alves & A. Matos Peixoto Kleinert 2011. Checklist of bees and honey plants from São Paulo State, Brazil. Biota Neotropica 11 (1a):631-655. (distribution); Sagot et al., 2018Sagot, P, J. Mérida, R. Ayala & R. Vandame 2018. Situación actual del conocimiento de la fauna de abejas (Apoidea: Anthophila) del estado de Chiapas, México. In: (Ed.). Memorias X Congreso Mesoamericano sobre Abejas Nativas. 191-2011. (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).