The genus Synergus Hartig (Hymenoptera: Cynipidae: Synergini) in the New World: a complete taxonomic revision with a key to species Author Lobato-Vila, Irene Author Pujade-Villar, Juli 0000-0001-7798-2717 jpujade@ub.edu text Zootaxa 2021 2021-01-12 4906 1 1 121 journal article 8839 10.11646/zootaxa.4906.1.1 308129a3-a99f-4012-bb41-d3220692c398 1175-5326 4434000 09383AAD-8E30-4E50-A533-C6DA4D00E33C Synergus shorthousei Lobato-Vila & Pujade-Villar, 2019 Synergus shorthousei Lobato-Vila & Pujade-Villar in Lobato-Vila et al . (2019) . Proc. Entomol. Soc. Wash. 121 (2): 236. Type material: UB ( holotype ), paratypes in UB , UACh and USNM. New material examined (5ϐ & 8♀ ). Material collected from Mexico and deposited in UB with the following location data: MEX : P390, Las Cruces, San Luis Huexotla (Texcoco, EDO . MEX .), Ex. Andricus sp. (tuberous), Q. microphylla , ( 05.vii.2018 ) vii.2018 , V .D.C.Ll. leg. Diagnosis . See Lobato-Vila et al . (2019: 238). Distribution . Mexico : Guanajuato , Hidalgo , México , Michoacán , Oaxaca , and Zacatecas (Lobato-Vila et al . 2019; authors). Biology . Reared from woody tuberous galls of different Andricus species on twigs of oaks of both Quercus and Lobatae sections (Lobato-Vila et al . 2019; authors). Remarks . Some females, among the new specimens that were studied, have the metasoma slightly dorsodistally incised (not incised among specimens from the type series) and the hypopygial spine just slightly longer than wide (about 3.0 times as long as wide among specimens from the type series). Despite these subtle differences, we have no doubt that they belong to the same species, especially given that they were obtained from the same morphotype (and genus) of galls.