Synergus formosanus Schwéger & Melika, 2015

Synergus formosanus Schwéger & Melika in Schwéger et al. (2015a): 469, ♀ & ♂.

Distribution. Taiwan (Schwéger et al. 2015a: 469, 472), South Korea (Lobato-Vila et al. 2020d: 187), and China (Beijing, Gansu, Heilongjiang, Henan, Jilin, Liaoning, Shaanxi, Shandong, Zhejiang Provinces) (Lobato-Vila et al. 2021a: 350–351).

Biology. Reared from galls of Trichagalma formosana ŏ, T. formossana ssp. romevai ŏ, T. serratae ŏ and Plagiotrochus kunugiphagus ŏ on different section Quercus and section Cerris oaks (Table 2; Schwéger et al. 2015a; Lobato-Vila et al. 2020d, 2021a).