Polybia minutissima Saussure, 1854:170, Richards, 1978Richards, O.W. 1978. The social wasps of the Americas excluding the Vespinae. British Museum (Natural History), London. 1-567.:143, Holotype ♀ (MIZSU, Turin). - Richards, 1978Richards, O.W. 1978. The social wasps of the Americas excluding the Vespinae. British Museum (Natural History), London. 1-567.:143 ( listed as synonym of Protopolybia exigua binominata (Schulz, 1906)).
Polybia binominata Schulz, 1906:233 - Santos et al., 2015Santos, J.N. dos Jr., O.T. Silveira & J.M. Carpenter 2015. Phylogeny of Protopolybia Ducke, 1905 and taxonomic revision of the Protopolybia exigua species-group (Hymenoptera, Vespidae, Polistinae) with description of four new species. Zootaxa 3956 (2):151-182.:169 ( listed as synonym of Protopolybia minutissima (Spinola, 1851)). - As Protopolybia exigua binominata: - Richards, 1978Richards, O.W. 1978. The social wasps of the Americas excluding the Vespinae. British Museum (Natural History), London. 1-567. (distribution); Rasmussen & Asenjo, 2009Rasmussen, C. & A. Asenjo 2009. A checklist to the wasps of Peru (Hymenoptera, Aculeata). ZooKeys 15:1-78. (distribution); Kumar et al., 2009Kumar, J.T. Longino, R.K. Colwell & S. O'Donnell 2009. Elevational patterns of diversity and abundance of eusocial paper wasps (Vespidae) in Costa Rica. Biotropica 41 (3):338-346. (distribution); Valverde et al., 2019Valverde, P., P. Hanson & J. Carpenter 2019. Keys to the Costa Rican species of paper wasps (Hymenoptera: Vespidae: Polistinae). Revista de Biología Tropical (International Journal of Tropical Biology and Conservation) 67 (2):174-199. (distribution).