Retrocitomyia Lopes

Mello-Patiu, Cátia Antunes De & Salazar-Souza, Mônica, 2016, Retrocitomyia Lopes, 1982 (Diptera: Sarcophagidae): new species, new records, key to males, and an updated catalog, Zootaxa 4171 (3), pp. 534-548 : 544-545

Key to males of Retrocitomyia Lopes

(modified from Lopes [1985])

1 Fronto-orbital plate silvery pruinose...................................................................... 2

- Fronto-orbital plate yellowish or golden pruinose............................................................ 4

2 Gena silvery pruinose with only black setae; postgonite parallel to body axis, i.e. apex turned anteriorly................................................................................................... argentina Lopes, 1988

- Gena golden or yellowish pruinose with only pale setae; postgonite perpendicular to body axis, i.e. apex turned laterally.... 3

3 Cercus with a central-median tuft of short setae and external margin slightly constricted and sinuous (posterior view, Fig. 1 9 )................................................................................... adolenda ( Lopes, 1935)

- Cercus without such a tuft of setae, external margin almost straight, without any constriction (posterior view, Fig. 18 )......................................................................................... retrocita ( Hall, 1933)

4 Gena with all or most of the setae black................................................................... 5

- Gena with most of the setae pale, with some black setae only along the upper genal margin........................... 7

5 Cercus broad, cercal prongs conspicuously broad and divergent (posterior view); coverage of setae on cercus interrupted in the middle and cercus with a projection carrying a tuft of setae near the base ( Fig. 15 )............... fluminensis Lopes, 1985

- Cercus and cercal prongs not conspicuously broad; coverage of setae on cercus uninterrupted and cercus without a projection near its base......................................................................................... 6

6 In lateral view, vesica subtriangular with a median excision; juxta with a narrow and not globose base ( Fig. 22 )................................................................................................ andina Lopes, 1985

- In lateral view, vesica rounded and without a median excision; juxta with an expanded and globose base ( Fig. 21 ).......................................................................................... trinitatensis Lopes, 1985

7 Cercal prong gradually tapering in posterior view, with an acute apex and a central depressed area with a cluster of setae ( Fig. 16 ).................................................................... mizuguchiana Tibana & Xerez, 1985

- Cercal prong curved and convergent in posterior view, with a rounded apex and without a central setose depressed area ( Figs. 14, 17 , 23, 24 )....................................................................................... 8

8 Outer margin of cercus medially constricted, length of cercal prong equal to or slightly longer than cercal base; cercal depression inconspicuous ( Figs 14, 17 , 23 )...................................................................... 9

- Outer margin of cercus without a median constriction, cercal prong shorter than cercal base; cercal depression conspicuously large ( Fig. 24 )................................................................... urumajoensis Lopes, 1985

9 Median region of cercus with a setose, rounded elevation near its inner margin ( Fig. 23 )........... mexicana Lopes, 1985

- Median region of cercus without such elevation............................................................ 10

10 Cercus, in posterior view, with a cluster of short setae from the middle of the cercal base to the base of the cercal prong; vesica with apex bent laterally; juxta longer than wide ( Figs 2 , 7 , 14 )............. sisbiota Mello-Patiu & Salazar-Souza , sp. nov.

- Cercus, in posterior view, with a cluster of long, hair-like setae along the inner margin of the of the prong; apex of vesica not bent; juxta wider than long ( Figs 12 , 17 )............................................. paraguayensis Lopes, 1985

Figures

FIGURES 1 – 3. Retrocitomyia sisbiota sp. nov. 1. Male habitus (paratype, MNRJ), lateral view. 2. Male terminalia (paratype, MNRJ), lateral view. 3. Female terminalia (paratype, MZSP), ventral view. Scale bars = 1 mm.

FIGURES 4 – 9. Retrocitomyia sisbiota sp. nov. 4. Male sternite 5 (paratype, MNRJ), ventral view. 5. Terminal segments of male abdomen (paratype, MNRJ), lateral view. 6. Male cerci (paratype, MNRJ), posterior view. 7. Phallus (paratype, MNRJ), lateral view. 8. Phallus (paratype, MNRJ), ventral view. 9. Female terminalia (paratype, MNRJ), ventral view. Abbreviations: bp = basiphallus, ce = cercus, ep = epandrium, hy = hypoproct, jx = juxta, ls = lateral stylus, ms = median stylus, pp = paraphallus, ST = sternite, su = surstylus, T = tergite, ve = vesica, vp = vaginal plate. Scale bars = 0.2 mm.

FIGURES 14 – 19. Male terminalia, posterior view. 14. Retrocitomyia sisbiota sp. nov. (paratype, MNRJ). 15. Retrocitomyia fluminensis Lopes (specimen from MS, Bodoquena). 16. Retrocitomyia mizuguchiana Tibana & Xerez (specimen from MS, Corumbá). 17. Retrocitomyia paraguayensis Lopes (specimen from MT, Chapada dos Guimarães); 18. Retrocitomyia retrocita (Hall) (specimen from MT, Chapada dos Guimarães). 19. Retrocitomyia adolenda (Lopes) (paratype, MNRJ). White arrows point to the postgonite.

FIGURES 20 – 24. Male terminalia. 20. Retrocitomyia trinitatensis Lopes (holotype, CNC), epandrium and cerci in posterior view. 21. Retrocitomyia trinitatensis Lopes (holotype, CNC), phallic complex in lateral view. 22. Retrocitomyia andina Lopes (paratype, MNRJ), terminalia in lateral view. 23. Retrocitomyia mexicana Lopes (paratype, MNRJ), terminalia in posterior view. 24. Retrocitomyia urumajoensis Lopes (paratype, MNRJ), terminalia in posterior view. Black arrows point to the postgonite. Abbreviations: jx = juxta, ve = vesica.

FIGURES 10 – 13. Male terminalia, lateral view. 10. Retrocitomyia fluminensis Lopes (specimen from MS, Bodoquena). 11. Retrocitomyia mizuguchiana Tibana & Xerez (specimen from MS, Corumbá). 12. Retrocitomyia paraguayensis Lopes (specimen from MT, Chapada dos Guimarães). 13. Retrocitomyia retrocita (Hall) (specimen from MT, Chapada dos Guimarães).