Condylostylus

Li, Xuankun, Li, Zhu & Yang, Ding, 2012, Condylostylus Bigot from Vietnam with description of a new species and a key to Vietnamese species (Diptera: Dolichopodidae), Zootaxa 3521, pp. 59-66 : 61

Key to males of species of Condylostylus from Vietnam

1 At least mid and hind coxae brown or black ( Figs. 1-3, 5-6 ); cercus not geniculate in shape ( Figs. 13–15 , 17 )............ 2

- All coxae yellow ( Fig. 4 ); cercus geniculate in shape ( Fig. 16 )................................... C. geniculatus Yang

2 Fore coxa yellow ( Figs. 2, 6 )............................................................................ 3

- Fore coxa black ( Figs. 1, 3, 5 )........................................................................... 4

3 Wing dark brown with distinct white opaque window ( Fig. 8 ); fore coxa with numerous short setae on inner surface; cercus much elongated (7–8 times as long as epandrium), and without setose ventral process ( Fig. 14 )............................................................................................... C. damingshanus Wang, Zhu et Yang

- Wing brown to dark brown but without distinct white window ( Fig. 12 ); fore coxa without such setae on inner surface; cercus rather short (little longer than epandrium), with short ventral process bearing long setae ( Fig. 18 )... C. vietnamensis sp. nov.

4 Cercus wide band-like or nearly finger-like ( Figs. 13, 15 ); fore tarsomere 1 not flattened basally; all femora entirely black ( Fig. 3 ), or at most with extreme tips of femora brownish yellow or brown ( Fig. 1 )...................................... 5

- Cercus expanded and hatchet-shaped ( Fig. 17 ); fore tarsomere 1 basally flattened; all femora black with yellow apices ( Fig. 5 )..................................................................................... C. latipennis Parent

5 Cercus wide band-like, slightly shorter than epandrium, not extending much beyond apex of surstylus, without setose ventral mound ( Fig. 13 )...................................................................... C. conspectus Becker

- Cercus thin finger-like, slightly longer than epandrium, much extending beyond apex of surstylus, with distinctive setose ventral mound ( Fig. 15 )................................................................... C. fenestratus (Wulp)

Figures

FIGURE 18. Condylostylus vietnamensis sp. nov. Male terminalia, lateral view. Scale bar = 0.25 mm. Abbreviations: cer, cercus; epn, epandrium; hyp, hypandrium; ph, phallus; sur, surstylus.

FIGURES 1 – 6. Male habitus photographs. 1, Condylostylus conspectus Becker; 2, Condylostylus damingshanus Wang, Zhu et Yang; 3, Condylostylus fenestratus (Wulp); 4, Condylostylus geniculatus Yang; 5, Condylostylus latipennis Parent; 6, Condylostylus vietnamensis sp. nov. Scale bars = 1 mm.

FIGURES 13 – 15. Male genitalia, lateral view. 13, Condylostylus conspectus Becker; 14, Condylostylus damingshanus Wang, Zhu et Yang; 15, Condylostylus fenestratus (Wulp). Scale bars = 0.5 mm.

FIGURES 16 – 17. Male genitalia, lateral view. 16, Condylostylus geniculatus Yang; 17, Condylostylus latipennis Parent. Scale bars = 0.5 mm.

FIGURES 7 – 12. Wings (male). 7, Condylostylus conspectus Becker; 8, Condylostylus damingshanus Wang, Zhu et Yang; 9, Condylostylus fenestratus (Wulp); 10, Condylostylus geniculatus Yang; 11, Condylostylus latipennis Parent; 12, Condylostylus vietnamensis sp. nov. Scale bars = 1 mm.