Lonchaea, Fallen, 1820

Macgowan, Iain, 2018, Definition of the Lonchaea polyhamata species-group (Diptera, Lonchaeidae) with a description of new species, Zootaxa 4446 (3), pp. 325-342 : 340-341

Key Afrotropical Lonchaea males with two katepisternal setae

1 Male genitalia: parameres long and blade-like ( Fig.4 ), hypandrium with a long posterior apodeme reaching to near base of cerci ( Fig. 1 )...( L. polyhamata group) ...................................................................... 2

- Male genitalia without blade-like parameres, hypandrium without a long posterior apodeme.......................... 8

2 Parameres with outer apical margin smooth ( Figs. 24 & 28 ).................................................... 3

- Parameres with spicules on outer apical margin ( Figs. 4 , 7 , 12 , 16 & 19 ).......................................... 4

3 Only one paramere with a strong medial tooth ( Fig. 24 ). Posterior process of surstylus bearing large two claw- like projections and a smaller medial one ( Figs. 21–23 )................................................... polyhamata McAlpine

- Both parameres with a strong medial tooth ( Figs. 25 & 28 ). Posterior process of surstylus with three ventrally directed projections ( Figs 25–27 )....................................................................... teratosa McAlpine

4 Parameres broad ( Figs. 4 & 16 ).......................................................................... 5

- Parameres long and narrow ( Figs. 7 , 12 , & 19).............................................................. 6

5 Parameres apically with numerous processes, spicules and setulae ( Fig. 4 ). In lateral view posterior process of surstylus with two long curved posterior projections ( Figs. 2 & 3 )................................................ dama sp. nov.

- Parameres apically with only a single large, blunt medial process, spicules limited to a small outer area ( Fig. 16 ). In lateral view posterior process of surstylus with a single posterior tooth-like projection ( Figs 13–15 )................ taita sp. nov. 6 Paramere almost straight, 2 rather small medial processes, numerous spicules near apex on outer margin ( Fig 12 ). Posterior process of surstylus with three similar sized medially directed projections ( Figs. 9–11 )................... njombe sp. nov.

- Apices of parameres curved outwards at apex, medial processes larger and more obvious ( Figs. 7 & 19 )................. 7

7 Apex of paramere smoothly curved outwards, with one large and one smaller medial process ( Fig. 7 ). Posterior process of surstylus with a three similar sized projections ( Figs. 5 & 6 )........................................... mbeya sp. nov.

- Apex of paramere curved outwards at almost right angles, one large and several smaller medial projections ( Figs. 19 & 20 ) In lateral view posterior process of surstylus with two rather blunt projections and a long, curved medial projection ( Figs. 17 & 18 )...................................................................................... zomba sp. nov.

8 Eyes covered with long white hairs. Orbital plate bearing setulae. Last apparent abdominal tergum elongate. Male genitalia; surstylus with a very large, angled posterior projection, a large serrated spike arising from base of cerci ( Figs. 29–31 ).............................................................................................. aberdare sp. nov.

- Eyes bare, orbital plates bare. Male terminalia not as above.................................................... 9

9 Epandrium elongated into a large rounded ventral process.Ventral lobe of surstylus bearing a black stump-like process at medial base, left twice as large as that on right; apices of these processes irregularly serrate ( Figs 39–41)...................................................................................................... dichaeta McAlpine

- Epandrium without a large rounded ventral process.......................................................... 10

10 Epandrium in lateral view more rectangular with a large rounded postero-ventral process. Medial surface of surstylus with 2 small posterior teeth. ( Figs. 33–36 ).......................................................... kleynbergi sp. nov.

- Epandrium almost circular in lateral view, without ant processes. Medial margins of surstyli with a single, large slightly curved process ( Figs. 37–38 ).................................................................... muhavura sp. nov.

Figures

FIGURE 1. Lonchaea zomba sp. nov. Exploded view of the hypandrium and associated structures

FIGURES 2–4. Lonchaea dama sp. nov. 2. Epandrium and associated structures lateral view. 3.same ventral view. 4. Paramere lateral view. Cerc = Cercus, Sur = surstylus, V pro = ventral process, Epand. = epandrium, para = paramere, t10 = tergite 10, as = anterior sclerite.

FIGURES 21–24. Lonchaea polyhamata McAlpine. 21. Epandrium and associated structures lateral view. 22. Epandrium, hypandrium and associated structures lateral view. (parameres and phallus removed). 23. Same, posterior view. 24. Parameres lateral view.

FIGURES 25–28. Lonchaea teratosa McAlpine. 25. Epandrium and associated structures lateral view. 26. same ventral view. 27. same posterior view. 28. Hypandrium and parameres lateral view.

FIGURES 5–8. Lonchaea mbeya sp. nov. 5. Epandrium and associated structures ventral view (parameres and phallus removed). 6. Same posterior view. 7. Paramere lateral view. 8. Phallus lateral view.

FIGURES 9–12. Lonchaea njombe sp. nov. 9. Epandrium and associated structures lateral view (parameres and phallus removed). 10. same ventral view. 11. same posterior view. 12. Paramere lateral view.

FIGURES 13–16. Lonchaea taita sp. nov. 13. Epandrium and associated structures lateral view. 14. same ventral view (parameres and phallus removed). 15. same posterior view. 16. Paramere lateral view.

FIGURES 17–20. Lonchaea zomba sp. nov. 17. Epandrium and associated structures lateral view. 18. same ventral view (parameres and phallus removed). 19. Paramere lateral view. 20. Parameres and phallus ventral view.

FIGURES 29–32. Lonchaea aberdare sp. nov. 29. Epandrium and associated structures lateral view. 30. same ventral view 31. Same, internal view. 32 Phallus ventral view.

FIGURES 33–36. Lonchaea klyenbergi sp. nov. 33. Epandrium and associated structures lateral view. 34. same ventral view 35. Same, internal view. 36. Phallus ventral view.

FIGURES 37–38. Lonchaea muhavura sp. nov. 37. Epandrium and associated structures lateral view. 38. Same ventral view.