Thaumaleidae, Bezzi, 1913

Pivar, Robert J., Sinclair, Bradley J. & Moulton, John K., 2020, Revision of the South American species of Austrothaumalea Tonnoir (Diptera Thaumaleidae), Zootaxa 4853 (4), pp. 509-526 : 510

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

Figures

FIGURE 1. Male of the non-South American species Austrothaumalea zentae Theischinger illustrating the proepisternal seta, dorsolateral view. Abbreviations: fcx, fore coxa; prepst s, proepisternal seta.

FIGURE 2. Left wing of Austrothaumalea spatulata. Abbreviations: C, costa, CuA sp, anterior branch of cubital vein and spur; M, medial veins; m-cu, medial-cubital crossvein; R, radial veins; r-m, radial-medial crossvein; Sc, subcosta. Scale bar = 1.0 mm.