Key to the Hyaliodini genera of Brazil

Based on Henry & Ferreira (2003), Carvalho (1982), Akingbohungbe (1979), Carvalho & Schaffner (1977), and Carvalho (1974).

1 Antennal segment II clearly foliate....................................................................... 2

- Antennal segment II cylindrical, flattened, non-foliate......................................................... 3

2 Vertex longitudinally furrowed; labium reaching the anterior coxa or apex of mesosternum; antennal segment I cylindrical or thickened (not foliate), cuneus as long as wide..................................................... Piestotomus

- Vertex not longitudinally furrowed; labium reaching the posterior coxa; antennal segment I foliate, cuneus as long as wide................................................................................................. Auchus

3 Antennal segment I thickened, flattened laterally, irregular........................................... Perissobasis *

- Antennal segment I cylindrical, sometimes thickened, neither flattened laterally nor irregular.......................... 4

4 Antennal segment I longer than the vertex width.................................................. Brasiliocarnus

- Antennal segment I equal or narrower than the vertex width.................................................... 5

5 Pronotum strongly narrowing to the anterior margin; eyes distinctly wider than the anterior margin of pronotum; coxa I receptacle visible from above................................................................... Carijoanus *

- Pronotum not strongly narrowing to the anterior margin; coxa I receptacle not visible from above..................... 6

6 Antennal segment I as long as the segment II, and longer (3x) than the head length; eyes contiguous to pronotum.... Annona *

- Antennal segment I smaller than the segment II, and less than 3x the length of the head; eyes removed from pronotum..... 7

7 Pronotum strongly convex and bent towards the head and lateral margins; antennal segment I as long as the vertex width; species oval or rounded shape, with embolium very wide and laterally rounded.............................. Florus *

- Pronotum not strongly convex and not bent towards the head and lateral margins; antennal segment I greater than the vertex width; species elongated, embolium not strongly explained and rounded.......................................... 8

8 Large, heavily grainy eyes, occupying almost the entire lateral region of the head; eyes reaching the gula, contiguous or very close to pronotum; hairy eyes between omatids; segment II 4 x longer than segment I. Hemelytron finely rough and punctate; embolium-corial and clavus-corial punctate sutures; enlarged embolium; membrane with dense and short pubescence.. Antias

- Not as above........................................................................................ 9

9 Length of antenna segment I shorter than head width; eyes located in the middle of the head................ Paracarnus

- Length of antenna segment I equal to or longer than the width of head; eyes not located in the middle of the head........ 10

10 Head twice as wide as long; eyes removed from the collar by a distance less than half its width; pronotum slightly narrowed towards the colar........................................................................... Hyaliodocoris *

- Head not than twice as wide as long; eyes far from the collar by a distance more than half or about the width of an eye; pronotum visibly narrowed towards the collar............................................................... Hyaliodes *