Key to females of Nanophareus species

1. Scutal area IV undivided (Figs. 2 D, 4D, 8D)............................................................... 2

- Scutal area IV divided by a longitudinal median groove (Fig. 6 D).............................. N. bipartitus sp. nov.

2.(1) Frontal hump on anterior margin of dorsal scutum with one or more enlarged, high tubercle(s) (Figs. 4 D, 8D)............ 3

- Frontal hump on anterior margin of dorsal scutum unarmed (tuberculate) (Fig. 2 D)......................... N. palpalis

3.(1) Ocularium widened (approximately ½ of carapace width), smooth (Fig. 8 D).................. N. bosqenublado sp. nov.

- Ocularium narrow and hemispherical (approximately ½ of carapace width), with enlarged tubercles and small ones (Fig. 4 D)................................................................................... N. araucanus sp. nov.