Key to male and female adults of South American genera of Thaumaleidae

(modified from Pivar et al. (2018b)).

1 Antealar ridge absent; proepisternal setae present (Fig. 1).................................. Austrothaumalea Tonnoir

- Antealar ridge present (Pivar et al. 2018b, fig. 4); proepisternal setae absent....................................... 2

2 R 1 (+R 2+3) with several widely spaced weakenings or depigmented gaps (e.g., Fig. 2); eye bridge broad, more than five facets wide; male terminalia without hypandrium and parameres fused................................. Niphta Theischinger

- R 1 (+R 2+3) without widely spaced weakenings or depigmented gaps; eye bridge narrow, comprising two to three facets (Pivar et al. 2018b, fig. 4); male terminalia with hypandrium narrow and parameres separate, not fused (Pivar et al. 2018b, figs 8, 9)..................................................................... Neothaumalea Pivar, Moulton & Sinclair