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 castanopsidis ( Beutenmüller, 1918 ) Periclistus castanopsidis Beutenmüller, 1918 . Entomol. News 29: 251. Type material: USNM. Synergus castanopsidis : Weld (1926) . Proc. U. S. Nat. Mus. 68 (10): 112. Diagnosis . See Lobato-Vila et al . (2020c: 13) . Distribution . USA : California ( Beutenmüller 1918 ). Biology . Reared from asexual galls of Dryocosmus castanopsidis (Beutenmüller, 1917) on C. chrysophylla ( Beutenmüller 1918 ) . Remarks . The type material of Synergus castanopsidis was examined and the species was redescribed and illustrated by Pujade-Villar & Melika (2005: 215) , and the species was later treated by Lobato-Vila et al . (2020c: 13) .