91 Gnathoncus rotundatus (Kugelann, 1792) head, dorsal view 92 antennal club, ventral view 93 mentum, ventral view 94 prosternum 95 mesoventrite + metaventrite 96 lateral disc of metaventrite + metepisternum 97 protibia, ventral view 98 mesotibia, ventral view.