Key to species of the genus Coarazuphium (modifed from Gnaspini et al., 1998).

1. Eyeless; maximum width of elytra at middle....................................................... C. cessaima .

- With very reduced eyes; maximum width of elytra near apex................................................... 2

2. Posterior margin of the elytra not sinuate............................................................. C. pains .

- Posterior margin of the elytra sinuate...................................................................... 3

3. One pair of dorsal setae at the posterior border of head; head wider than pronotum (1.2)....................... C. tessai .

- Two pairs of dorsal setae at the posterior border of head; head almost as wide as pronotum........................... 4

4. Head much narrower than elytra (0.55), with two pairs of setae on dorsal surface........................... C.bezerra .

- Head slightly narrower than elytra (0.71), three pairs of setae on dorsal surface...................... C. formoso, sp. n.