Key to genera close to Somoplatus

( Masoreina partim: genera with mentum tooth present and prosternal apophyse bearing 4–12 long, distant setae)

1 (2) Lateral margin of pronotum with 6–10 stiff setae. Stylomere 2 basally very broad, with one spiniform seta on outer side. Surface of body glabrous ........................ ................................................................................... Somoplatodes Basilewsky

2 (1) Lateral margin of pronotum with 2 setae. Stylomere 2 basally narrow, with one spiniform seta on inner side or without seta. Surface of body setose or glabrous.

3 (4) Surface of body glabrous. Hind margin of elytra sinuous. Suture ending in sharp pointed spine. Tooth of mentum fairly short, tip rounded. Stylomere 2 without lateral setae, outer margin with angular extension ................. Lophidius Dejean

4 (3) Surface of body pubescent, partly pubescent or glabrous. Hind margin of elytra rounded, straight or slightly sinuous but without sutural spine. Stylomere 2 with 1 lateral seta on inner side ....................................................................................... ............................ Somoplatus Dejean (incl. Paralophidius Basilewsky, syn. n.)