Fannia tumidifemur Stein, 1911

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 : 342-343

Fannia tumidifemur Stein, 1911

Figs. 22 A-D

Fannia tumidifemur Stein, 1911:104 ; 1918:235; 1919:133; Séguy, 1937:176; Albuquerque, 1957:12; Pont, 1972:6; Albuquerque et al., 1981:10, 19 and 21; Almeida et al., 1985:279-284; Carvalho et al., 1993:16; 2002:112; 2003:20.

Diagnosis: Frontal vitta as wide as anterior ocellus. Eye bare. Parafacial bare. Antenna light brown. Palpus dark brown. Thorax brown, with dark brown vitta along pprn and ia lines, light grey in prescutellar area and apex of scutellum. One pra very near spal, almost indistinguishable from ground setulae. F2 with 1 long basal pv and a row of pv spaced at base, shorter, stouter, denser and hooked forming 2 rows at apex. T 2 constricted in medial half. C3 with 2 hair-like setae at apex of posterior margin. F3 normal and slightly curved; with a weak preapical posteroventral protuberance; 1 row of long, thin hair-like pv and a preapical tuft of long and curled pv 3x femoral width. T 3 lacking medial row of ad. Wing clear. Halter yellowish-white. Abdomen heart-shaped, grey brown pruinose in ground colour, yellow at base of tergite 1, and antero-lateral margins of tergites 2, 3 and 4.

Material examined: Argentina: Tucumán 1 o, La Cavera, 23/ 28-XI-1951, Cols. Aczel & Gollbach ( FIML); 15 o, Quebrada la Toma , 21-XII-1950, Col. R . Golbach ( FIML) .

Description

Male: body length 5-5.3 mm.

Head: Frontal vitta covered with dark brown pruinescence, at narrowest point as wide as anterior ocellus. Fronto-orbital plate heavily silvery grey shinning pruinescence, at uppermost fr 0.5x width of anterior ocellus. Eye bare, antero-internal facets much larger than remaining. Twelve fr, 1.25x length of flagellum; pocl setae in single uniform row. Face and parafacial silvery grey pruinose; parafacial at base of flagellum 0.6x width of same and bare. Facial carina and gena grey-brown. Scape and pedicel light brown, flagellum light grey, 2.5x longer than wide. Arista brown, short pubescence. Palpus dark brown, clavate, the apex 3x width of base. Lower oral margin slightly convex.

Thorax: Brown, with dark brown vitta along pprn and ia lines, light grey in prescutellar area and apex of scutellum; pleura grey; 3+3 acr, with a 4th row of acr in posterior 1/3; 1 prescutellar acrs; 2+3 dc; pprn covered with setulae; 1 pra very near spal, almost indistinguishable from ground setulae; 2 prepm surrounded by 5 to 6 setulae.

Legs: Dark brown, tibia light brown and tarsi black. F1 slightly globose (length/width = 5.8); 1 row pd; 2 rows of p; 2 to 3 of very short rows of pv at base, and 4 to 5 long and stout rows of pv in apical fourth. T 1 with 1 preapical pd; 1 apical v and pv; lacking ad row. Fore tarsomere 1 0.3x length of T 1; tarsomere 4 short, as long as broad. F2 with 1 row of ad; 2 to 3 rows of very short a; 1 row of basally long av, shorter towards apex; 1 long basal pv and 1 row of pv spaced at base, shorter, stouter, denser and hooked forming 2 rows at apex; 1 row of p, hair-like and sparse at base, stouter and ventrally directed towards apex. T 2 constricted in medial half; lacking subbasal protuberance; ventral pubescence short, less than 0.5x tibial width; 1 submedial and 3 apical a; 1 subapical ad; 1 very long apical av; 1 submedial and 1 apical pd; 1 apical pv and p. C3 with 2 hair-like setae at apex of posterior margin. F3 normal (length/width = 6.25) slightly curved; with a weak preapical posteroventral protuberance; with 1 row of ad, dorsally directed towards apex; 1 row of av in basal ¾, longer towards apex and 1 apical av separated from row; 1 row of long, thin hair-like pv and a preapical tuft of long and curled pv 3x femoral width. T 3 with 1 submedial and 1 shorter subapical d; 1 subapical ad and 1 submedial ad, lacking medial row of ad; 3 to 4 medial av, apical av longer than remaining; 1 apical av; ventral and posteroventral surfaces with a very weak apical ctenidium.

Wing: Clear, slightly yellow-brown tinted. Lower calypter rounded and upper oval, both white. Knob of halter yellowish-white, stalk and base light brown.

Abdomen: Heart-shaped, tergite 2 2x width of tergite 4. Grey brown pruinose in ground colour, yellow at base of tergite 1, and anterior lateral margins of tergites 2, 3 and 4. Hypopygium not protruding.

Postabdomen: Posterior margin of sternite 5 strongly indented, and bearing most setae ( Fig. 22A ). Hypandrial arms directed outwards, basal lateral margins grooved; postgonite inconspicuous; aedeagus membranous ( Fig. 22B ). Cercal plate fused; bacilliform process tooth-shaped; surstylus very broad at base and thin at apex, weakly connected to epandrium. ( Fig. 22 C-D).

Distribution: NEOTROPICAL: Mexico, Bolivia, Brazil. Argentina (new record), Tucumán province.

Figures

FIGURE 22: Fannia tumidifemur Stein. A. Male sternite 5, ventral. B. Male hypandrium, ventral. C. Male terminalia external structures, ventral. D. Male terminalia external structures, lateral.