Synergus longiscapus Lobato-Vila & Pujade-Villar, 2017:14, ♂♀. Holotype ♀, MEX: 300, Santa Fe (D.F.), 19°21'14'N, 99°16'24.22'W, 2569 m, Pujade-Villar (Universitat de Barcelona, Barcelona, Spain, leg. (20.vi.2016) vii.2016); Lobato-Vila et al., 2020Lobato-Vila, I., A. Equihua-Martínez, E.G. Estrada-Vengegas, D. Cibrián-Tovar, U.M. Barrera-Ruíz & J. Pujade-Villar 2020. Synergus Hartig species group (Hymenoptera: Cynipidae: Synergini) with partially smooth mesopleurae from the New World. Zootaxa 4822 (1):1-38.:22, Holotype (UB); Lobato-Vila et al., 2020Lobato-Vila, I., D. Cibrián-Tovar, U.M. Barrera-Ruíz, A. Equihua-Martínez, E.G. Estrada-Venegas, E. Tovar-Sánchez, E. Catillo-Mendoza, M.L. Buffington & J. Pujade-Villar 2020. Review of the Synergus Hartig species (Hymenoptera: Cynipidae: Synergini) associated with woolly galls on oaks from the New World, with the description of a new species from Mexico. Proceedings of the Entomological Society of Washington 122 (3):678-715.:699, Holotype (UB); Lobato-Vila & Pujade-Villar, 2021Lobato-Vila, I. & J. Pujade-Villar 2021. The genus Synergus Hartig (Hymenoptera: Cynipidae: Synergini) in the New World: a complete taxonomic revision with a key to species. Zootaxa 4906 (1):1-121.:62, Holotype (UB). - Lobato-Vila & Pujade-Villar, 2018Lobato-Vila, I. & J. Pujade-Villar 2018. Estado actual del conocimiento de la diversidad de inquilinos de agallas de Cinípidos en encinos de México (Hymenoptera: Cynipidae). Entomología mexicana 5:435-443. (distribution); Lobato-Vila et al., 2020Lobato-Vila, I., A. Equihua-Martínez, E.G. Estrada-Vengegas, D. Cibrián-Tovar, U.M. Barrera-Ruíz & J. Pujade-Villar 2020. Synergus Hartig species group (Hymenoptera: Cynipidae: Synergini) with partially smooth mesopleurae from the New World. Zootaxa 4822 (1):1-38. (distribution); Lobato-Vila et al., 2020Lobato-Vila, I., D. Cibrián-Tovar, U.M. Barrera-Ruíz, A. Equihua-Martínez, E.G. Estrada-Venegas, E. Tovar-Sánchez, E. Catillo-Mendoza, M.L. Buffington & J. Pujade-Villar 2020. Review of the Synergus Hartig species (Hymenoptera: Cynipidae: Synergini) associated with woolly galls on oaks from the New World, with the description of a new species from Mexico. Proceedings of the Entomological Society of Washington 122 (3):678-715. (distribution); Nastasi & Deans, 2021Nastasi, L.F. & A.R. Deans 2021. Catalogue of Rose Gall, Herb Gall, and Inquiline Gall Wasps (Hymenoptera: Cynipidae) of the United States, Canada and Mexico. Biodiversity Data Journal 9 (e68558):1-41. (distribution); Lobato-Vila & Pujade-Villar, 2021Lobato-Vila, I. & J. Pujade-Villar 2021. The genus Synergus Hartig (Hymenoptera: Cynipidae: Synergini) in the New World: a complete taxonomic revision with a key to species. Zootaxa 4906 (1):1-121. (distribution).