Key to some species of female Pieza occurring in Brazil (based on female genitalia)

1 Common duct short with about ¼ length of proximal spermathecal duct to very short, almost indistinct; spermathecal reservoir elongate (Figs 26, 51, 60)............................................................................... 2

- Common duct long, almost as long as proximal spermathecal duct; spermathecal reservoir oval with papillate apex (Fig. 9)......................................................................................... P. ankh sp. nov.

2 Genital fork without hyaline plate; spermathecal reservoir without glandular trichomes (Figs 26, 51)................... 3

- Genital fork with hyaline plate bearing digitiform lateral projections and weakly sclerotized; spermathecal reservoir with glandular trichomes (Fig. 60)................................................................. P. silvanae sp. nov.

3 Genital fork produced anteriorly, open posteriorly; distal spermathecal duct undulate, about 12.0X longer than proximal section (Fig. 26)........................................................................... P. bittencourti sp. nov.

- Genital fork arched anteriorly, posterior ½ branched, distal spermathecal duct not undulate, about 4.0X longer than proximal section (Fig. 51)......................................................................... P. rafaeli sp. nov.