Stenogephrya

Webb, Donald W. & Hauser, Martin, 2011, Revision of the genus Stenogephyra Lyneborg (Diptera: Therevidae: Phycinae), Zootaxa 2837, pp. 67-85 : 71

Key to Stenogephrya species

1. Vein M2 reaching wing margin; katepisternum completely covered with silver pubescence; silver pubescence on gena (lateral view) abundant, reaching from lower eye margin to ventral margin of head ( Figs. 3, 7, 11 ) and dorsally on occiput to about mid-height of eye; dorsocentral macrosetae absent; two pairs of notopleural macrosetae.............................. 2

- Vein M2 usually abbreviated, not reaching wing margin ( Lyneborg 1987, Fig. 6 ); at least ventral part of katepisternum glossy without silver pubescence, except in S. schlingeri in which the katepisternum is completely pubescent; silver pubescence on gena (lateral view) predominately absent, restricted on occiput to band along posterior margin of eye from vertex to lower eye margin ( Figs. 5, 9, 13, 15 ); one pair of dorsocentral macrosetae; 2–3 pairs of notopleural macrosetae................... 4

2. Silver pubescence along anterior eye margin with large triangular extension at height of antenna, which nearly reaches antennal base and second, smaller, semicircular extension at height of median ocellus, both are connected by narrow line along eye margin ( Fig. 2 ); halter with more white than brown; male gonocoxite lateral view ( Fig. 18 ) with posteroventral projection......................................................................................... dianeae spec. nov.

- Silver pubescence along anterior eye margin not greatly expanded at level of antennal base and not reaching height of frontal ocellus ( Figs. 6, 10 ); halter predominately dark brown to black; male gonocoxite in lateral view (Fig. 24) lacking posteroventral projection......................................................................................... 3

3. Silver pubescence along anterior eye margin of equal width to broadened area below level of eyes ( Fig. 10 ) parkeri spec. nov.

- Silver pubescence along anterior eye margin wider at height of antennal base then becoming narrow before broadened area below level of eyes ( Fig. 6 )................................................................. minuta Lyneborg

4. Silver pubescence along anterior eye margin restricted to a single semicircular expansion at level of antennal base ( Fig. 12 ); two pairs of notopleural macrosetae; katepisternum completely silver pubescence; lower face broadly rounded ( Fig. 13 )......................................................................................... schlingeri spec. nov.

- Silver pubescence along anterior eye margin forming two connected markings and often reaching below lower eye margin ( Figs. 4, 8, 14 ); three pairs of notopleural macrosetae; katepisternum glossy ventrally; lower face with central hemispherical bulge and laterally the gena and lower frons forming another bulge separated from central bulge by deep furrow, creating impression of a “nose” ( Figs. 5, 9, 15 )..................................................................... 5

5. Silver pubescence along anterior eye margin reaching lower face ( Fig. 8 ); silver pubescence on frons present, silver pubescence on occiput forming a complete band posteriorly on occiput behind ocellar tubercle ( Fig. 8 ); halter knob completely white................................................................................... namibiensis spec. nov.

- Silver pubescence along anterior eye margin not reaching lower face ( Figs. 4, 14 ); silver pubescence on frons between median ocellus and eye absent; silver pubescence on occiput not forming continuous band posterior to ocellar tubercle ( Figs. 4, 14 ); halter predominately dark brown to black................................................................... 6

6. Silver pubescence on occiput present forming an uninterrupted, narrow band from posterad of ocellar tubercle to posteroventral eye margin ( Fig. 15 ); silver pubescence along anterior eye margin extending ventrally beyond lower eye margin ( Fig. 14 ); “nose” less pronounced ( Fig. 15 )............................................................ torrida Lyneborg

- Silver pubescence on occiput restricted to posteroventral eye margin ( Fig. 4 ); silver pubescence along anterior eye margin ending before or at level of lower eye margin ( Fig. 4 ); “nose” more pronounced ( Fig. 5 )................. janiceae spec. nov.

Figures

FIGURES 2 – 15. Stenogephyra sp. nov. 2 – 3. S. dianeae spec. nov.. 2. Head frontal view. 3. Head lateral view. 4 – 5. S. janiceae spec. nov.. 4. Head frontal view. 5. Head lateral view. 6 – 7. S. minuta. 6. Head frontal view. 7. Head lateral view. 8 – 9. S. namibiensis spec. nov.. 8. Head frontal view. 9. Head lateral view. 10 – 11. S. parkeri spec. nov. 10. Head frontal view. 11. Head lateral view. 12 – 13. S. schlingeri spec. nov. 12. Head frontal view. 13. Head lateral view. 14 – 15. S. torrida. 14. Head frontal view. 15. Head lateral view.

FIGURES 16 – 21. Stenogephyra dianeae spec. nov. 16. Male tergite 8, epandrium, cerci, hypoproct. 17. Male sternite 8, gonocoxite ventral view. 18. Gonocoxite, lateral view. 19. Aedeagus, lateral view. 20. Female sternite 8. 21. Female internal reproductive organs. FIGURES 22 – 27. S. janiceae spec. nov. 22. Male sternite 8, gonocoxite ventral view. 23. Gonocoxite, dorsal view. 24. Gonocoxite, lateral view. 25. Aedeagus, lateral view. 26. Female sternite 8. 27. Female furca. FIGURES 28 – 31. Stenogephyra namibiensis spec. nov. 28. Male sternite 8, gonocoxite ventral view. 29. Aedeagus, lateral view. 30. Female sternite 8. 31. Female furca. Scale = 0.1 mm.