Fannia coxata Shannon & Del Ponte, 1926

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 : 307-308

Fannia coxata Shannon & Del Ponte, 1926

Figs. 1A , 6 A-G

Fannia coxata Shannon & Del Ponte, 1926:574 ; Malloch, 1934:207; Séguy, 1937:167; Pont, 1972:4; Carvalho et al., 1993:9; Carvalho et al., 2003:10.

Diagnosis: Small to medium size, grey and yellow species. Frontal vitta at narrowest point 1.5x width of anterior ocellus. Parafacial bare. Antenna and palpus yellow-orange. Thorax grey covered with heavy light-brown pruinescence, dark brown vittae visible in full length of acr, broader in dc and postsutural ia lines. One pra near spal, 2x length of ground setulae. T 2 cone-shaped, lacking subbasal protuberance. C3 with 4 to 5 long and stout p at apex of posterior surface. F3 globose with a preapical protuberance on posterior surface, imperceptible in anterior view. T 3 with very long submedial and subapical d; and lacking medial row of ad. Wing clear. Halter white. Last segments of abdomen curved; most tergites laterally yellow-orange. Hypopygium projecting.

Type material examined: Holotype o, Argentina: San Pedro de Jujuy, 27-IV-1926, cols. Shannon & Shannon. ( USNM).

Other material examined: Argentina: Neuquen 1 o Lake Lacar, Hua Hum , 11/ 16-X-1946, col. Howard ( FIML) . La Rioja 67 n, 2 o, Quebrada de Olta , 14-X-2000, cols. Domínguez & Roig ( IADIZA) . 13 o, 3 Km East of Solca , 15-X-2000, cols. Domínguez & Roig ( IADIZA) .

Description

Male: body length 4.4-4.9 mm Head: Frontal vitta covered with dark grey to black pruinescence, at narrowest point 1.5x width of anterior ocellus. Face, facialia and fronto-orbital plate covered with heavy silvery pruinescence. Fronto-orbital plate at uppermost fr 2x width of anterior ocellus. Parafacial at base of flagellum as wide as same and bare. Ten fr slightly longer than flagellum, with 3 to 4 short setulae in between. Eye slightly setulose; pocl regular in length, slightly shorter than outer vertical setae, gradually shorter further away from the vertex. Facial carina dark grey to orange in some specimens. Gena grey. Scape light brownish orange, pedicel and base of flagellum yellow-orange; flagellum 2.6-2.8x as long as broad and covered with heavy grey pruinescence in apical 0.75. Arista yellow in basal third, remaining dark brown, pubescence shorter than aristal width at base. Palpus clavate, apex 2.5 to 3x width of base, yellow-orange. Lower oral margin straight and grooveless.

Thorax: Scutum grey, covered with heavy light-brown pruinosity, dark brown vittae visible in full length of acr, broader in dc and postsutural ia lines, the latter continuing in basal 0.75 of scutellum. Apex of scutellum yellow. Pleura grey; 2+3-4 acr and 1 prescutellar acrs; 2+3 dc; pprn covered with setulae; 1 pra near spal, 2x length of ground setulae; prealar area covered with setulae; 2 prepm surrounded by 2 setulae.

Legs: Dark brown, but coxae, trochanters and tibiae yellow. C3 with 4 to 5 long and stout p at apex of posterior surface ( Fig. 1A ). F1 globose (length/ width = 4.6); with 2 rows of pd; 3 rows of p; 2 rows of pv, basally short and 4 to 5 longer apical pv, as long as femoral width. Fore tarsomere 1 0.3x length of T 1; tarsomeres 3-5, very short, about as wide as long. F2 with 1 row of ad; 3 rows of very short a; 1 row of av, shorter towards apex; 1 long basal pv, longer than femoral width, and basally 2 rows of hair-like and 3 to 4 rows of pv at apex; 1 row of p stouter and ventrally directed at apex. T 2 straight, constricted at base, lacking subbasal protuberance; ventral pubescence very short, 0.2x width of T 2; with 1 submedial and 3 apical a; 1 subapical ad; 1 apical av; 1 apical and 1 submedial pd; 1 apical pv and p. C3 with 4 to 5 long and stout p at apex of posterior surface ( Fig. 1A ). F3 globose, (length/width = 4.6); with a preapical protuberance on posterior surface, imperceptible in anterior view; 1 row of ad dorsally directed towards apex; 1 row of av as long as femoral width, interrupted preapically, and with 1 apical av separated from the basal row; 1 row of short and setulose pv, and a subapical tuft of curled hair-like pv, as long as femoral width ( Fig. 6A ). T 3: with 1 very long submedial and 1 subapical d; 1 submedial and 1 apical ad, lacking medial row of ad; 5 medial av; apex of ventral surface with a weak ctenidium.

Wing: Clear. Lower calypter oval-shaped, upper calypter rounded, both white. Knob of halter white, light brown at base.

Abdomen: Laterally viewed, last segments curved. Elongated, width of segments approximately uniform ( Fig. 1A ). Tergite 1 dark brown, yellow at apex; tergite 2 dark brown at apex, remaining yellow-orange; tergite 3 with a central and a apical dark brown stripe, laterally yellow-orange; the remaining tergites darkbrown-grey. Hypopygium projecting.

Postabdomen: Sternite 5 broader than long, butterflyshaped, completely covered with setae on posterior margin ( Fig. 6B ). Hypandrial arms very short, base of hypandrium strongly indented, basal lateral margins grooved; postgonites inconspicuous; aedeagus sclerotized in basal portion ( Fig. 6 C-D).Composite segment lobulated in central area; epandrium bilobated and medially broadened; cercal plate fused, broader than long, with two lobes in posterior region; baciliform process tooth-shaped; surstyli simple, long, broad and lateral respect to epandrium ( Fig. 6E ).

Female: body length: 4-4.5 mm. Differs from male as follows:

Head: Frontal vitta shiny grey, anterior margin (towards lunula) reddish, viewed from above matt black. Ocellar triangle extending up to lowermost fr. Frons and vitta broad, the distance between eye margins exceeds 0.3x head width. Eye bare. Four to 5 strong fr slightly shorter than third flagellomere, with setulae half as long as fr in between. Upper and lower orb present, with 1 row of fronto-orbital setulae; pocl less than 0.3x length of outer and inner verticals, longer than in male.

Legs: F2 with 1 very short row of setulose av; row of pv absent. T 2 cone-shaped, the base narrower than apex; ventral pubescence absent; with 1 apical and 2 submedial v-av. C3 bare at apex of posterior margin. F3: preapical posteroventral protuberance absent; with a row of short av, 1 longer medial and 1 longer subapical av; posterior and posteroventral surfaces bare. T 3: with 1 submedial ad, lacking apical ad; 3 medial and 1 short apical av; ventral and posteroventral apical ctenidium inconspicuous.

Abdomen: Heart-shaped, tergite 2 more than 2x width of tergite 4. Yellow, with brown markings at apex of tergite 1, and at apex and central line of tergites 2, 3 and 4; tergite 5 grey with apical and central brown markings.

Postabdomen: Cerci normal, short; anal plate longer than broad; sternite 8 reduced to two anterior plates bearing three setulae and short spinules; sternite 6 reduced to a central and posterior line (“ T ” shaped); post abdominal spiracles situated on ventral margins of tergite 6 ( Fig. 6F ). Two pear-shaped very globose spermathecae, with partially sclerotized ducts ( Fig. 6G ).

Distribution: ANDEAN: province of Neuquén, Argentina; NEOTROPICAL: provinces of La Rioja and Jujuy, Argentina.

Figures

FIGURE 1: F. coxata Shannon & Del ponte. A. Male hind coxa and abdomen, lateral. F. schnusei Stein. B. Male fore tarsi, dorsal. C. Male hind leg, anterior. F. fusconotata (Rondani). D. Male head, anterior. F. scalaris (Fabricius). E. Male mid coxa, anterior. F. roigi sp. nov. F. Male mid tibia, posterior. G. Male hind leg, anterior. F. hermani sp nov. H. Wing.

FIGURE. 6: Fannia coxata Shannon & Del Ponte. A. Male hind leg, anterior. B. Male sternite 5, ventral. C. Male hypandrium, ventral. D. Male hypandrium, lateral. E. Male terminalia external structures, ventral. F. Female terminalia external structures, ventral. G. Spermatheca.