Ceroptres pomiformis Ashmead, 1885:300, ♂. 2 ♂♂; Weld, 1922Weld, L.H. 1922. Notes on cynipid wasps, with descriptions of new North American species. Proceedings of the United States National Museum 61 (18):1-29.:26, Type ♀ (not ♂) (United States National Museum); 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.:26, Lectotype ♀ (USNM, No. 14539). - As Synergus pomiformis: - Weld, 1922Weld, L.H. 1922. Notes on cynipid wasps, with descriptions of new North American species. Proceedings of the United States National Museum 61 (18):1-29.:26 (comb. nov.); 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).
Synergus flavus Kieffer, 1904:133, 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.:26, Lectotype ♀ (USNM, No. 25005). Synonymized with Synergus pomiformis (Ashmead, 1885) by 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.:26.
Synergus varicolor Fullaway, 1911:371, 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.:26, Lectotype ♀ (USNM, Lot 500, Sub 18). Synonymized with Synergus pomiformis (Ashmead, 1885) by 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.:26.
Synergus variegatus McCracken & Egbert, 1922:51, 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.:26, Paralectotypes 1 ♂, 2 ♀♀ (USNM, Lot 554, Sub 226). - 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.:26 ( listed as synonym of Synergus pomiformis (Ashmead, 1885)).