Male and female genitalia of Trichotichnus (Bottchrus) nanus Habu, 1954: A median lobe of aedeagus, right lateral view; B ditto, dorsal view; C ditto, ventral view; D ditto, left lateral view; E sclerotic armature of internal sac of aedeagus, left lateral view; F ditto, right lateral view; G left paramere; H right paramere; I male sternite Ⅸ; J female genitalia. Scale bars: 0.5 mm (A–D, I); 0.3 mm (E, F, J); 0.2 mm (G, H).