Key to genera of afrotropical continental Derelomini (sensu Franz 2006)

1. Eyes in dorsal view flat, not protruding over contour of head capsule in dorsal view. Larvae developing on Elaeis guineensis Jacq. (Arecaceae) ......................................................................... 2

– Eyes in dorsal view convex (Fig. 1B), at least moderately exceeding the contour of head capsule in dorsal view (Fig. 2F). Larvae developing on other plants than Elaeis guineensis ........................... 3

2. Integument black, deeply sculptured, without darker or paler markings on prothorax and elytra. Prothorax with a knob or tooth between procoxae and basal margin of prosternum ......................... ........................................................................................................................ Prosoestus Faust, 1899

– Integument yellow to reddish brown, shallowly sculptured, usually with dark markings on prothorax and elytra. Prothorax lacking knob or tooth behind procoxae, in some species males with a prosternal process between procoxae ................………………………..………… Elaeidobius Kuschel, 1952

3. Claws free ......................................................................................................................................... 4

– Claws connate. Central Africa (Congo) ............................... Lomederus ghesquierei Marshall, 1932

4. Forehead flat, lacking a middle groove (Fig. 1C). Lateral carina of prothorax generally strangled before apex (Fig. 1C). Body of penis with a thickening near base, visible in lateral view. In males, stridulatory plate (tergite VII) basally indented on each side of the row of tubercles ........................ .............................................................................................................. Derelomus Schoenherr, 1825

– Forehead with a middle groove (Fig. 1B). Lateral carina of prothorax constricted before apex (Fig. 1A). Width of body of penis regular in lateral view (Fig. 6). In males, stridulatory plate (tergite VII) with basal margin smooth, lacking indentation on each side of the row of tubercles (Fig. 1J) .. .............................................................................................................. Ebenacobius Haran gen. nov.