Synergus gifuensis Ashmead, 1904

Synergus gifuensis Ashmead, 1904: 78, ♀ [♂ in Pujade-Villar et al. (2014b: 538)].

Synergus atamiensis Ashmead, 1904: 77, ♀ [syn. in Schwéger et al. (2015a: 485)].

Distribution. Japan (Hokkaido, Honshu, Kyushu), the Russian Far East (Pujade-Villar et al. 2014b: 538; Schwéger et al. 2015a: 486), and China (Zhejiang Province and Ningxia Hui Autonomous Region) (Lobato-Vila et al. 2021a: 351).

Biology. Reared from galls of Andricus mukaigawae ŏ and A. kashiwaphilus ŏ on Q. dentata (sect. Quercus) (Table 2; Abe 1990, 1992b; Pujade-Villar et al. 2002; Pujade-Villar et al. 2014b; Schwéger et al. 2015a).