Group 4: Dichotomius (Cephagonus) ingens (Luederwaldtı 1935) species group

Diagnosis. this species group is composed of brachypterous species – flightless species with atrophied hindwing and is revised in Nunes and Vaz-de-Mello 2016. The group is differentiated of other by the following combined characters: anterior portion of pronotal disc with two to four lobes; hindwing atrophied (Figure 7 (h)); pronotum wider than elytra in dorsal view (Figure 41); elytra strongly convex in lateral view and elytra lacking humeral callus.

Representatives. 4.1: D. ingens; 4.2: D. darwini; 4.3: D. manni; 4.4: D. paresi; 4.5: D. periotoi .