Mythicomyiinae, Melander, 1902

Rafael, J. A. & Limeira-De-Oliveira, F., 2014, Mitinha and Tamanduamyia, two new genera of Mythicomyiinae (Diptera, Mythicomyiidae) from northeast Brazil, Zootaxa 3827 (4), pp. 591-598 : 597-598

Key to genera of Mythicomyiinae of the world

(modified from Evenhuis 2002a)

1 Antenna with one flagellomere ( Fig. 14 ). Stylus distal, tiny, inconspicuous (visible only in higher magnification); postcranium produced, subequal to eye length ( Figs 12, 13 ).......................................... Tamanduamyia , gen. nov.

- Antenna with two flagellomeres and stylus placed apically ( Fig. 2 ) or subapically on the second flagellomere ( Fig. 21 ); postcranium not produced ( Fig. 1 )....................................................................... 2

2 Antenna with stylus placed apically on second flagellomere.................................................. 3

- Antenna with stylus placed subapically on second flagellomere ( Fig. 21 ).......................................... 4

3 Vein A 1 complete, reaching wing margin ( Fig. 22 ); costal vein incomplete, ending between R 4+5 and M 1 veins......................................................................................... Mythenteles Hall & Evenhuis

- Vein A 1 short, incomplete, reaching alular incision level; costal vein circumambient ( Fig. 3 )........... Mitinha , gen. nov.

4 Costal vein circumambient; cell dm fairly short, closed apically ( Fig. 23 )...................... Reissa Evenhuis & Baéz

- Costal vein incomplete, ending just beyond end of vein R 4+5. Cell dm much longer than wide ( Figs 24, 25 ) or open apically. 5

5 Wing with well-developed keel-shaped anal lobe; vein separating basal cells not evident ( Fig. 25 ); males holoptic................................................................................................ Mythicomyia ... 6

- Wing with anal lobe normal, not keel-shaped; vein separating basal cells distinct, often well sclerotized ( Fig. 24 ); males dichoptic........................................................................................... 7

6 Males with secondary sexual character modifications on the legs (modified shapes of and notches in mid and/or hind legs and presence of pegs and large setae).......................................... Mythicomyia (Mythicomyia) Coquillett

- Males without secondary sexual character modifications of legs..................... Mythicomyia (Heterhybos) Brèthes

7 Wing with cell dm open, distal veins faint or effaced; head as wide as or wider than thorax......... Nexus Hall & Evenhuis

- Wing with cell dm complete ( Fig. 22 ); distal veins not faint; head usually narrower than thorax........... Pieza Evenhuis

Figures

FIGURES 12–20. Tamanduamyia bandeira, sp. nov., paratype specimens. 12. Habitus, lateral view, male. 13. Head, dorsal view, male; 14. antenna, male (stylus inside red circle); 15. First flagellomere, male (stylus inside red circle); 16. Wing, male; 17. Male terminalia, lateral view; 18. Phallus and gonostylus, dorsal view (epandrium and hypandrium removed); 19. Sclerite of vaginal furca, female; 20. Sperm pump and apex of spermathecae. Abbreviations: AAAS, anterior arm of aedeagal sheath; BPH, basiphallus; CE, cercus; CSD, common spermathecal duct; DPH, distiphallus; EJ AP, ejaculatory apodeme; EP, epandrium; GST, gonostylus; HY, hypandrium; LEP, lateral ejaculatory process; SCL, sclerite of vaginal furca; SP, sperm pump; T8, tergosternite VIII; VF, vaginal furca.

FIGURES 1–11. Mitinha neri, sp. nov., paratype specimens. 1. Habitus, lateral view, female. 2. Antenna, male; 3. Wing, male; 4. Epandrium and cerci, male, posterior view; 5. Male terminalia, dorsal; 6. Phallus, lateral view; 7, Hypandrium and gonostylus, dorsal view; 8, Hypandrium and gonostylus, lateral view; 9. Vaginal furca and sperm pump, female; 10. Apex of spermathecal duct; 11. Mid part of apical spermathecal duct with microvilli tubules. Abbreviations: AAAS, anterior arm of aedeagal sheath; BPH, basiphallus; CE, cercus; DPH, distiphallus; EJ AP, ejaculatory apodeme; EP, epandrium; GST, gonostylus; HY, hypandrium; LEP, lateral ejaculatory process; DPH, distiphallus; SP, sperm pump; T8, tergosternite VIII; VF, vaginal furca.

FIGURES 21–25. Mythicomyiidae. 21. Antennae of Pieza, from Piauí, Brazil; 22. Wing of Mythenteles, from Evenhuis (2002a); 23. Wing of Reissa, from Greathead & Evenhuis (2001); 24. Wing of Pieza, from Piauí, Brazil; 25. Wing of Mythicomyia, from Piauí, Brazil.