Pseudochartergus chartergoides isthmensis Richards, 1978:157, ♀. Holotype ♀, Panama: Sabanas, 20.iv.23 (USNM, leg. R.C. Shannon); Santos et al., 2020Santos, J.N. dos Jr., O.T. Silveira & J.M. Carpenter 2020. Taxonomic revision of the P. chartergoides species-group of the genus Protopolybia Ducke, 1905 (Hymenoptera: Vespidae, Polistinae). Zootaxa 4858 (4):542-554.:547, Holotype ♀ (USNM). - Richards, 1978Richards, O.W. 1978. The social wasps of the Americas excluding the Vespinae. British Museum (Natural History), London. 1-567. (distribution). - As Protopolybia chartergoides isthmensis: - Carpenter et al., 2012Carpenter, J.M., B.R. Garcete-Barrett & Y.J.A.F. López 2012. Las Vespidae (Hymenoptera: Vespoidea) de Guatemala. In: Cano, E.B. & J.C. Schuster (Ed.). Biodiversidad de Guatemala. Volumen 2. 269-279. (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). - As Protopolybia isthmensis: - Santos et al., 2020Santos, J.N. dos Jr., O.T. Silveira & J.M. Carpenter 2020. Taxonomic revision of the P. chartergoides species-group of the genus Protopolybia Ducke, 1905 (Hymenoptera: Vespidae, Polistinae). Zootaxa 4858 (4):542-554. (distribution).