Psaenythia argentina Friese, 1908:42, Lectotype ♂ (ZMHB), designated by Ramos & Melo, 2010Ramos, K.S. & G.A.R. Melo 2010. Taxonomic revision and phylogenetic relationships of the bee genus Parapsaenythia Friese (Hymenoptera, Apidae, Protandrenini), with biogeographic inferences for the South American Chacoan Subregion. Systematic Entomology 35:449-474.:466. - Ramos & Melo, 2010Ramos, K.S. & G.A.R. Melo 2010. Taxonomic revision and phylogenetic relationships of the bee genus Parapsaenythia Friese (Hymenoptera, Apidae, Protandrenini), with biogeographic inferences for the South American Chacoan Subregion. Systematic Entomology 35:449-474.:466 ( listed as synonym of Parapsaenythia serripes (Ducke, 1908)). - As Parapsaenythia argentina: - Friese, 1916Friese, H. 1916. Zur Bienenfauna von Costa Rica. Stettiner Entomologische Zeitung 77:287-348. (distribution); Friese, 1921Friese, H. 1921. Nachtrag zur Bienenfauna von Costa Rica. Stettiner Entomologische Zeitung 82:74-98. (distribution).
Caenohalictus serripes Ducke, 1908:29 - As Parapsaenythia serripes:
Anthrenoides iheringi Schrottky, 1911:83, Ramos & Melo, 2010Ramos, K.S. & G.A.R. Melo 2010. Taxonomic revision and phylogenetic relationships of the bee genus Parapsaenythia Friese (Hymenoptera, Apidae, Protandrenini), with biogeographic inferences for the South American Chacoan Subregion. Systematic Entomology 35:449-474.:466, Holotype ♂ (depository institution unknown, not found in the MZSP). - Ramos & Melo, 2010Ramos, K.S. & G.A.R. Melo 2010. Taxonomic revision and phylogenetic relationships of the bee genus Parapsaenythia Friese (Hymenoptera, Apidae, Protandrenini), with biogeographic inferences for the South American Chacoan Subregion. Systematic Entomology 35:449-474.:466 ( listed as synonym of Parapsaenythia serripes (Ducke, 1908)).