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 cultratus Ritchie & Shorthouse, 1987 Synergus cultratus Ritchie & Shorthouse, 1987 . Proc. Entomol. Soc. Wash. 89 (2): 231. Type material: AMNH ( holotype ), paratypes in AMNH , USNM and CAS . Diagnosis . See Lobato-Vila et al . (2019: 206). Distribution . Guatemala ( Ritchie & Shorthouse 1987 ). Biology . Woody tuberous galls on stems of Q. peduncularis ( Ritchie & Shorthouse 1987 ; Lobato-Vila et al . 2019), one of them probably belonging to a species similar to ‘ Andricus ruginosus Basset, 1890 ’ (considered as incertae sedis by Pujade-Villar 2013). According to Nieves-Aldrey & Medianero (2011) , the other galls might correspond to a species of Andricus that produces galls similar to those of Odontocyinps championi (Cameron, 1833) . Remarks . The type material of Synergus cultratus was examined and the species was treated and illustrated by Lobato-Vila et al . (2019: 205).