Provisional key to species of Hemilophini with 12-segmented antennae

(adapted from Martins and Galileo 2014 and Santos-Silva et al. 2020)

Note: there is not a reliable feature which allows separation of females in some of these genera.

1. Elytral apex rounded or obliquely truncate without projections at outer angle...................................... 2

- Elytral apex perpendicularly truncate in relation to body axis with short spine at outer angle, or obliquely truncate with long or somewhat long spine at outer angle....................................................................... 4

2(1). Humeral carina absent................................................... Murupeaca Martins and Galileo, 1992

- Humeral carina present................................................................................. 3

3(2). Frons in male with projections.......................................................... Phoebella Lane, 1966

- Frons in male without projections....................................................... Gagarinia Lane, 1956

4(1). Inner tooth of claws shorter than outer one; antennae in male short, just surpassing elytral apex...... Tabatinga Lane, 1966

- Inner tooth of claws about as long as outer one; antennae in male distinctly surpassing elytral apex..................... 5

5(4). Scape with distinct apical cicatrix.................................. Purusiella Dalens, Touroult & Tavakilian, 2010

- Scape without apical cicatrix or at most with slightly distinct cicatrix............................................ 6

6(5). Frons in male uniformly convex (Fig. 14); outer elytral angle with somewhat short spine in both sexes (Figs 13, 17)............................................................................................ Juninia Lane, 1966

- Frons in male projected (Figs 6, 25); outer elytral apex with distinctly long spine (Figs 1, 10) or nearly unarmed in female (Fig. 21) and short spine in male (Fig. 22)...................................................................... 7

7(6). Frons in male with a single projection (Figs 5, 6) bifid apically; elytral apex in both sexes with remarkably long spine on outer angle (Figs 1, 10)...................................................................... Purusia Lane, 1956

- Frons in male with two subconical projections (Fig. 25); elytral apex nearly unarmed or with short spine (Figs 21, 22)........................................................................... Sibapipunga Martins & Galileo, 1993