FIGURES 20–27 in The genus Ophiogomphus Lieftinck, 1964 in Vietnam, with descriptions of the female of O. minimus Karube, 2014 and O. phantoani sp. nov. (Odonata: Gomphidae)

FIGURES 20–27. Accessory genitalia [20, 22, 24, 26] in lateral view and cornua of glans [21, 23, 25, 27] in ventral view of Ophiogomphus spp. (20–21), O. longihamulus (rearranged from Karube 2014: Fig. 16 e, g); (22, 23), O. minimus (rearranged from Karube 2014: Fig. 18 e, g); (24, 25), O. phantoani sp. nov.; (26, 27), O. sinicus, Cao Bang Province.