Fannia hirtifemur ( Stein, 1904 )

Dominguez, Martha Cecilia, 2007, A taxonomic revision of the Southern South American species of the genus FANNIA Robineau-Desvoidy (Diptera: Fanniidae), Papéis Avulsos de Zoologia (São Paulo) 47 (24), pp. 289-347 : 319-322

Fannia hirtifemur ( Stein, 1904)

Figs. 11 A-F

Homalomyia hirtifemur Stein, 1904:457 .

Fannia hirtifemur ; Stein, 1911:109; 1919:131; Séguy, 1937:169; Pont, 1972:5; Albuquerque et al., 1981:10; Carvalho et al., 1993:11; 2003:13.

Diagnosis: Medium size black species. Frontal vitta black, at narrowest point as broad as anterior ocellus. Parafacial bare. Eye scarcely setulose. Antenna and palpus dark grey to black. Sctutum and scutellum black throughout. One long pra near the transverse suture and 1 shorter near spal, slightly longer and stouter than surrounding setulae. Wing smoky. Halter black. T 2 thin, constricted at base, with a subbasal protuberance. C3 with 2 p at apex of posterior margin. F3 thin, with a weak preapical protuberance on posteroventral surface, and with a subapical tuft of short hair-like pv slightly longer than femoral width, coinciding with the preapical protuberance Abdomen elongated, black, lateral anterior margins of tergites 2-5, slightly lighter coloured.

Material examined: Argentina: Tucumán 3 o, 1 n, Qda. La Toma, 21-XII-95, col. R. Golbach ( FIML). 1 n, Qda. Cainzo, Tucumán, 18/19-XI-95, col. R. Golbach ( FIML).

Description

Male: body length 6-6.5 mm

Head: Frontal vitta black, at narrowest point as broad as anterior ocellus. Fronto-orbital plate heavily covered with dark grey to black pruinescence, at uppermost fr 0.5x length of flagellum. Seventeen to 18 long fr, 1.6x length of flagellum. Eye scarcely setulose; pocl of uniform length. Face and facialia dark grey, parafacial at base of flagellum 0.6x width of same and bare. Facial carina black, gena dark grey. Scape and pedicel dark grey to black; flagellum short and thin, 2 to 2.4x as long as broad, heavily covered with dark-grey silvery pruinescence. Arista completely black, aristal pubescence shorter than aristal width at base. Palpus black and straight, the base about as broad as apex. Lower oral margin strongly convex, and deeply grooved.

Thorax: Sctutum and scutellum black throughout; 3+3 acr, with a fourth row in posterior third and 2 prescutellar acrs; 2+3 dc; pprn densely covered with long hair-like setae; 1 long pra near the transverse suture and a shorter near spal, slightly longer and stouter than surrounding setulae; prealar area covered with setulae; 2 prepm surrounded by numerous long setulae.

Legs: Completely black. F1 thin (length/width = 6.3); with 1 row of pd; 5 to 6 rows of hair-like p, slightly longer than femoral width; 1 row of pv as long as femoral width. T 1 with 1 subapical pd; 1 apical v; 1 apical pv; 1 submedial and 1 apical ad, lacking medial row. Fore tarsomere 1 slightly longer than 0.3x length of T 1, tarsomere 4 as long as broad. F2 with 1 row of ad; 2 rows of short a; 1 row of strong av; 1 long basal pv and 1 row of long pv at base, shorter and hooked at apex; 1 row of p long hair-like at base, stouter and ventrally directed at apex. T 2 thin, constricted at base, with a subbasal protuberance. Pubescence on ventral surface long, slightly shorter than femoral width; 1 submedial and 3 apical a; 1 subapical ad; 1 strong apical av; 1 long submedial and 1 apical pd; 1 apical p; 1 apical pv. C3 with 2 p at apex of posterior margin. F3 thin (length/width = 11), with a weak preapical protuberance on posteroventral surface; with 1 row of ad, longer and dorsally directed towards apex; 1 row of long av; with a subapical tuft of short hair-like pv slightly longer than femoral width, coinciding with the preapical protuberance ( Fig. 11A ). T 3 with a submedial and subapical d; 1 submedial and 1 apical ad, lacking medial row; 2 to 3 medial av and 1 short apical av; ventral and posteroventral surfaces with a weak ctenidium at apex ( Fig. 11A ).

Wing: Smoky, the anterior margin dark brown up to half the space between R 1 and R 2+3, the space between C and Sc is clear. Lower calypter oval, upper rounded both yellowish-white. Knob of halter black, stalk and base brown.

Abdomen: Elongated, the width of tergites approximately equal; black, lateral anterior margins of tergites 2-4, slightly lighter coloured. Hypopygium not protruding.

Postabdomen: Sternite 5 twice as long as broad, bilobated and bearing setae on anterior margin ( Fig. 11B ). Hypandrium arms directed outwards and thickened; postgonites inconspicuous; aedeagus membranous ( Fig. 11C ). Cercal plate fused; bacilliform process hook-shaped; surstyli simple, long and marginal respect to epandrium ( Fig. 11 D-E).

Female: body length: 4.8-5.2 mm. Differs from male as follows:

Head: Frontal vitta heavily dark-brown to reddish pruinose. Ocellar triangle short, extending up to third fr. Frons and vitta broad, the distance between eye margins 0.33x head width. Ten to eleven strong fr, 1.3x length of flagellum. Upper and lower orb present, with a single row of fronto-orbital setulae. Inner and outer vertical setae longer than in male.

Legs: F1 with 1 row of p as long as femoral width, and 3 to 4 rows of very short p. T 1 with 1 submedial ad, the apical ad absent. F2 with 1 row of very short av; row of pv very short, only in basal half. T 2 cone-shaped, the base narrower than the apex; ventral pubescence absent; with 1 submedial and 2 apical pd. F3 lacking preapical protuberance on posteroventral surface; with a short row of av and 3 subapical av as long or slightly longer than femoral width; posterior and posteroventral surfaces bare.

Abdomen: Heart-shaped to slightly elongated, tergite 4 less than 2x width of tergite 2.

Postabdomen: Cerci normal, short; anal plate broader than long and uniformly covered with setulae; sternite 8 reduced to 1 anterior pair of plates bearing 2 setae and 4 to 5 setulae, and 1 posterior pair of bare plates; post abdominal spiracles 7 and 8 on tergite 6. Three pear-shaped and grooved spermathecae, two normal in size and one reduced, with partially sclerotized ducts ( Fig. 11F ).

Distribution: NEOTROPICAL: Colombia, Ecuador, Peru, Brazil, and Northern Argentina.

Figures

FIGURE. 11: Fannia hirtifemur (Stein). A. Male hind leg, anterior. B. Male sternite 5, ventral. C. Male hypandrium, ventral. D. Male terminalia external structures, ventral. E. Male terminalia external structures, lateral. F. Spermathecae.