Synergus diaphanus Houard, 1911

—Distribution in the Eastern Black Sea Region: Bayburt, Giresun, GümüŞhane, Ordu and Trabzon (Figure 13)

—Host galls in the Eastern Black Sea Region: A. anatolicus, A. assarehi, A. caputmedusae, A. coriarius, A. infectorius, A. kollari and A. mitratus .