Ommatius (Pygommatius) segouensis, Scarbrough & Marascia, 2003

Scarbrough, Aubrey G. & Marascia, Claudio G., 2003, Revision of Ommatius Wiedemann (Diptera: Asilidae). IV. Pygommatius subgen. nov. with twenty-five Afrotropical species, Zootaxa 228 (1), pp. 1-94 : 55-56

Ommatius (Pygommatius) segouensis , sp. n.

Figs. 205­209

Male. As O. pectinus except as follows. Length, body 9.3­10.0 mm; wing 7.0­ 7.3 mm. Head: FHWR 1.0:5.2­1.0:6.0. Mystax with 2­3 yellow bristles; 4 thin, brown bristles present. Pedicel with 1 unusually long yellow seta, apex beyond flagellum.

Thorax: Mesonotum yellowish­brown tomentose anteriorly, otherwise yellowish­gray to gray; setae mostly yellow, sparse brown setae present between dorsocentrals posteriorly.

Wing: As O. pectinus ( Fig. 17 ).

Leg: Fore femur (see O. grossus , Fig. 24 ) with a row of ventral bristles. Middle femur with 5 long, stout posteroventral bristles. FHWLR 1.0:6.7­1.0:7.1. Fore and middle tarsi laterally with 10 and 4 yellow bristles, respectively.

Abdomen: Sternites 2­5 with numerous, erect, stout, yellow bristles.

Terminalia ( Figs. 205­209 ): Ventral lamella as pectinus except comb­like setae longer, thicker. Epandrium 3 branched; dorsal process short, concealed along inner surface of median branch; median branch wide with pointed apex; ventral branch narrow, forked apically. Hypandrium anteriorly with flat tuft of fused bristles, leaf­like in ventral view.

Female. Unknown.

SPECIMENS EXAMINED. Holotype ♂, paratype ♂, MALI: Segou / 5­VIII­1981 / J. W. Everts ( ZMAN).

Etymology. Latin, segouensis , of or pertaining to Segòu, Mali, its type locality.

Distribution. Known only from the type locality, Mali.

Remarks. Ommatius seqouensis is similar to O. pectinus but differs from congeners by the characters in the key, the smaller body, long yellow posteroventral bristles on the middle femur, and erect bristles on sternites 2­5.

Figures

FIGURES 205­209. Male terminalia of Ommatius segouensis, sp. n. 205­207. Lateral, dorsal and ventral views; 208. Gonostylus; 209. Aedeagus, lateral view. sp. n.

FIGURES 11­20. Right wing of male Ommatius (Pygommatius) spp. 11. O. imaginus, sp. n..; 12. O. limbus, sp. n..; 13. O. litoreus sp. n.; 14. O. lulua, sp. n.; 15. O. magnipes, sp. n.; 16. O. ornatipes Engel; 17. O. pectinus sp. n.; 18. O. porticus, sp. n.; 19. O. renudus, sp. n.; 20. O. strigiatus, sp. n.

FIGURES 21­28. Right wing of male Ommatius (Pygommatius) spp. 21. O. talus, sp. n.; 22. O. vultus, sp. n.; 23­28. Right fore femur of male Ommatius (Pygommatius) spp. showing arrangement of anteroventral bristles. 23. O. brevicornis Curran; 24. O. grossus, sp. n.; 25. O. limbus, sp. n.; 26. O. litoreus, sp. n.; 27. O. strigiatus, sp. n..; 28. O. vultus, sp. n.