Ommatius (Pygommatius) strigiatus, 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 : 56-57

publication ID	https://doi.org/ 10.11646/zootaxa.228.1.1
DOI	https://doi.org/10.5281/zenodo.5080345
persistent identifier	https://treatment.plazi.org/id/03A9FF3D-FFED-FFF4-9D15-5E98FC3DC7E1
treatment provided by	Felipe
scientific name	Ommatius (Pygommatius) strigiatus
status	sp. nov.

Treatment

Ommatius (Pygommatius) strigiatus View in CoL , sp. n.

Figs. 20 View FIGURES 1120 , 27 View FIGURES 2128 , 37 View FIGURES 2938 , 47 View FIGURES 3948 , 210217 View FIGURES 210217

Male. Black. Length, body 8.19.5 mm; wing 5.76.7. Head: Yellowishgray to gray tomentose, white setose. Face with sparse, short setae dorsally, longer and slightly more abundant setae ventrally; 4 pencillike white bristles ventrally and 6 thin, black bristles present; FHWR 1.0:5.91.0:6.1. Frons dull brown to brownyellow tomentose. Antenna with pedicel swollen, wider and slightly longer than flagellum. Ocellar tubercle with 2 posterior setae as long as 3 antennal segments combined. Occiput with 45 black postocular bristles dorsally, tip of longest bristle about third distance toward ocellar tubercle.

Thorax: Mesonotum subshiny, mostly brown tomentose, grooves, sides, and posterior brownyellow to yellowishgray; setae mostly black, sparse, scattered anteriorly; white setae abundant laterally, especially long on postpronotum and between rows of dorsocentral bristles posteriorly; 45 lateral and dorsocentral black bristles present. Scutellum brownyellow tomentose dorsally, gray apically with scattered, long, white setae; 2 black marginal bristles and a shallow preapical groove present. Pleuron black, mostly gray tomentose, with scattered, white setae and bristles; anepisternum yellowishgray. Halter yellow.

Wing ( Fig. 20 View FIGURES 1120 ): Apical and posterior margins narrowly dense microtrichose. Cell r 4 uniformly narrow beyond base to wing margin. Apex of cell m 3 perpendicular to long axis of wing, just beyond crossvein rm.

Leg: Coxae and trochanters black, former gray tomentose with white setae. Femora mostly yellow; fore and middle femora anteriorly mostly black; hind femur with apical half black, at least dorsally. Fore and middle femora basally with 46 thick, yellow bristles, the basal bristle unusually long, about half as long as fore femur ( Fig. 27 View FIGURES 2128 ), each bristle thereafter shorter and thinner; middle femur with bristles much thinner, shorter than on fore femur. Hind femur ( Fig. 37 View FIGURES 2938 ) narrow basoventrally, widest on basal onefifth; 1 short setigerous bristle and 68 long, thin, yellow anteroventral setae present; 57 short, peglike, black bristles basoposteriorly and 2 long, brown, bristles present preapically; HFWLR 1.0:4.41.0:5.0. Tibiae yellow with dark apex, fore tibia sometimes entirely yellow; lateral bristles yellow. Hind tibia ( Fig. 47 View FIGURES 3948 ) shorter than hind tarsus; apically, a short flange terminates in a raised anterior spur and a small tubercle present, each with a black bristle. Tarsi mostly black except basal tarsomeres mostly yellow; bristles black except 1 fore tarsal bristle yellow; basal tarsomere of middle tarsus laterally with row of short, closely spaced, bristles.

Abdomen: Constricted apically, segments 68 about half as wide as segment 2. Ground color black with apical margins of most segments brownishyellow; tomentum mostly brown dorsally, lighter brownishgray laterally and ventrally; mostly white setose, tergites black setose medially. Sternite 4 laterally with 67 white bristles; sternite 5 with row of very short bristles, each very light in color and with a large socket, the row ends apically with a small oval patch of 78 very short black and white bristles; sternite 6 with numerous white bristles, those of sternite 8 apically contrastingly long.

Terminalia ( Figs. 210214 View FIGURES 210217 ): Ventral lamellae basally with earlike process; process dense setose. Epandrium 2 branched; dorsal branch apically narrow, podiform; ventral branch forked apically. Gonocoxite with internal flange fused with external surface, not projecting posteriorly. Aedeagal sheath projecting above distiphallus as a flat, grooved, oval plate. Hypandrium with extremely narrow, pointed, drooping apex; surface with minute grooves and ridges.

Female. Differs from male as follows. Length, body 6.711.5 mm; wing 5.97.7 mm. Head: FHWR 5.61.0:6.7. Leg: Fore and middle femora basally with only 34 long, thin setae. Hind femur anteroventrally with 45 bristly setae, longest as great as width of femora medially; HFWLR 1.0:5.91.0:6.0. Middle tarsus anteriorly with only 3 short bristles. Abdomen: Bristle pattern of sternites 46 absent. Cercus longer than tergite 9. Terminalia ( Figs. 215217 View FIGURES 210217 ): Three spermathecae present; duct basal. Apical margin of sternite 8 with notch admedially.

SPECIMENS EXAMINED. Holotype ♂, allotype ♀, SOUTH AFRICA: NW Province / Pilanesberg National Park / Bakiburg 25 o 20’40”S 27 o 03’25”E 1170 m Camp / 12 19.xi.1999 / JGH Londt ( NMSA) GoogleMaps . Paratypes: BOTSWANA: 1 ♂, Serowe / Farmer’s Brigade / x. 1991 SE2226BD / Per Forchammer / Malaise Trap ( CMNH) ; 2 ♂, Serowe # 56 / Farmer's Brigade / 22° 25 S: 26° 14' E 1000 m / 28.xi.1990 / D. Forchhammer / malaise trap ( NMSA) GoogleMaps . SOUTH AFRICA: 4 ♂, 3 ♀, same data as holotype ( NMSA) GoogleMaps .

Distribution. A species captured in November at 1000 meters in Botswana and South Africa.

Etymology. Latin, strigiatus , for grooves and ridges, referring to the surface of the hypandrium.

Remarks. In addition to the characters in the key, the uniformly narrow cell r 4 ( Fig. 20 View FIGURES 1120 ) and short tibia ( Fig. 47 View FIGURES 3948 ) further characterize O. strigiatus .