Chlorogomphus (Sinorogomphus) sachiyoae Karube, 1995

(Figures 22, 23)

Examined specimens. 3 ♂♂, Khe Da Lai (18.1762 N, 105.5371 E, altitude 160 m), Vu Quang National Park, Phu Gia Commune, Huong Khe District, Ha Tinh Province, 9.v.2019, Q. T. Phan & Q.P. Ngo leg. ; 1 ♂, Khe Voi (18.4018 N, 105.2846 E, altitude 125 m), Vu Quang National Park, Son Kim 1 Commune, Huong Son District, Ha Tinh Province, 24.vii.2020, Q. T. Phan leg.

Notes. This species was originally described from Tam Dao National Park, Vinh Phuc Province (Karube 1995) and was subsequently reported from Pia Oac National Park, Cao Bang Province, both located in northern Vietnam (Kompier 2014). Recently Karube et al. (2020) also recorded this species from Pu Mat and Vu Quang National Parks, both in central Vietnam.