Key to known Afrotropical females of Thienemanniella

1. Two outer verticals present, tergite I with a patch of 3–4 setae ............................................ T. trivittata Goetghebuer

- Outer verticals absent, tergite I with patch of 1–2 setae............................................................................................... 2

2. Wings narrow; VR above 1.60; hind tibia with longest spur serrated; LR1 about 0.80, ................. T. lineola Freeman

- Wings wide; VR less than 1.60; hind tibia with a simple, slightly S-shaped spur; LR1 about 0. 70... T. fuga Lehmann