Key of male to species of the Phlugiola

(Three species are known only from females and thus they are not included here: P. appendiculata, P. dahlemica and P. redtenbacheri).

1. Subgenital plate apex not divided, elongate; styli straight and in close proximity to each other medially; cerci distinctly curved inwards; (Figs 1 C–E)..................................................................................2

- Subgenital plate apex bifurcate; styli distinctly curved and apart from each other medially; cerci nearly straight; (Figs 1 A–B)................................................................................................... 4

2. Cerci apex acuminate; styli with apex expanded (Figs 1 D–E)...................................................3

- Cerci with apex rounded; Styli with apex not expanded distally).................................. Phlugiola laurae

3. Subgenital plate extending well beyond cercal apex (Fig. 1 D).................................... Phlugiola arborea

- Subgenital plate ending at cercal apex (Fig. 1 E)....................................... Phlugiola longipedes sp. nov.

4. Subgenital plate ending well beyond cercal apex (Fig. 1 A). Styli not touching apically (Fig. 1 A). Posterior margin of titillator with one recurved tooth (Fig. 1 F)......................................................... Phlugiola amazonia

- Subgenital plate ending slightly before cercal apex (Fig. 1 B). Apex of styles touching each other (Fig. 1 B). Posterior margin of titillator with three recurved tooth (Fig. 1 G)............................................ Phlugiola igarape sp. nov.