Synergus japonicus Walker, 1874

Synergus japonicus Walker, 1874 . Cist. Ent. 1 (33): 309. Type material: NHMUK (holotype), paratypes in USNM according to Pujade-Villar et al. (2014).

Distribution. Japan (Kyűshű island, Ôita prefecture) (Walker 1874; Pujade-Villar et al. 2014), mainland China (Beijing and Hunan provinces) (Melika et al. 2004; Pujade-Villar et al. 2014), Far Eastern Russia (Primorskij Kraj, Khazan Lake vicinity) (Schwéger et al. 2015a) and South Korea (Abe et al. 2007).

Biology. Reared from galls of Andricus kashiwaphilus, A. mukaigawae and Biorhiza nawaii (Ashmead, 1904) on Quercus dentata and Q. serrata (Abe 1990; Melika et al. 2004; Pujade-Villar et al. 2014).