Key to the species of Paragigagnathus treated in this paper

1 All dorsal setae serrate except z5, smooth; spermatheca with atrium bulbous and calyx dish-shaped......... ............................................................................................................ P. cataractus (Ueckermann & Loots)

- All dorsal setae smooth; spermatheca with atrium almost indistinct and calyx funnel-shaped .................... ...................................................................................................... P. namibiaensis (Ueckermann & Loots) .