Fannia flavipalpis 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 : 311-312

Fannia flavipalpis Stein, 1911

Fannia flavipalpis Stein, 1911:103 ; 1919:131; Séguy, 1937:167; Ortiz, 1946:157; Albuquerque, 1957:21; Huckett, 1965:894; Pont, 1972:4; Pont, 2001:460; Albuquerque et al., 1981:10; Carvalho et al., 1993:10; 2003:11-12.

Diagnosis: Small grey and yellow species. Frontal vitta at narrowest point 0.8x width of anterior ocellus. Eye bare. Parafacial bare. Antenna light brown to yellow. Palpus yellow. Thorax light grey, light brown vittae visible in full length of acr, dc and ia. Two pra, one very thin and short near the spal and the other stouter and longer, near the transverse suture. T 2 constricted in medial half. C3 with two setulae at apex of posterior margin. F3 normal to globose lacking posteroventral protuberance; posteroventral surface bare. T 3 lacking medial row of ad. Wing clear. Halter yellow. Abdomen heart-shaped, light grey, and trimaculated.

Type material examined: Lectotype o, Chile, 15-X-1902, col. Schnuse ( SMTD). Paralecotype n, Chile, Palca, 15-X-1902, col. W. Schnuse ( SMTD).

Description

Male: body length 3.9 mm.

Head: Frontal vitta light grey, at narrowest point 0.8x width of anterior ocellus. frontoorbital plate heavy silvery pruinose, at uppermost fr as wide as anterior ocellus. Ten very long fr, 1.6x length of flagellum. Eye bare, antero-internal facets much larger than remaining; pocl of irregular length. Face and parafacial silvery grey; parafacial at base of flagellum 0.7x width of same and bare. Facial carina light brown. Gena grey. Scape and pedicel light brown to yellow, flagellum 1.8x as long as broad and heavy silvery grey pruinose. Arista light brown, short pubescent. Palpus yellow and slightly clavate, apex 1.5x width of the base. Lower oral margin slightly concave and groove less.

Thorax: Scutum light grey, light brown vittae visible in full length of acr, dc and ia; pleura grey; 3+3 acr, 1 prescutellar acrs; 2+3 dc; pprn with few short setulae; 2 pra, one very thin and short near the spal and the other stouter and longer, near the transverse suture; prealar area bare; 2 prepm lacking surrounding setulae.

Legs: Light brown, tibiae yellow and tarsi black. F1 normal to thin (length/width = 6.1); with 1 row of pd as long as femoral width; 2 rows of long hair-like p; 1 row of pv, short at base and slightly longer than femoral width at apex. T 1 with 1 subapical pd; 1 apical v and 1 apical pv. Fore tarsomere 1 0.3x length of fore tibia; tarsomere 4 as broad as long. F2 with 1 row of ad; 1 row of a; 1 row of av hair-like at base, stouter and shorter at apex; 1 row of hooked pv, doubled at apex; 1 row of p thin at base, stouter and ventrally directed at apex. T 2 constricted in medial half, lacking preapical protuberance; ventral pubescence median, 0.6x with of tibia; 1 submedial and 3 apical a; 1 subapical ad; 1 strong apical av setae; 1 submedial and 1 reduced apical pd; 1 apical, short and stout p. C3 with two setulae at apex of posterior margin. F3 normal to globose (length/width = 5.4), lacking posteroventral protuberance; with 1 row of ad longer and dorsally directed towards apex; 1 row of very short av and 2 long preapical av; posteroventral surface bare. T 3 with 1 long submedial and 1 subapical d, 0.5x length of submedial; 1 submedial and 1 apical ad, lacking medial row; 2 medial and 1 apical av setae; ventral and posteroventral surface with a weak apical ctenidium.

Wing: Clear. Lower calypter oval, upper rounded, both white. Halter yellow.

Abdomen: Heart-shaped, tergite 2 over 2x width of tergite 4. Light grey, trimaculated with lighter brown central and lateral markings in tergites 2, 3 and 4. Hypopygium not protruding.

Postabdomen: Posterior margin of sternite 5 indented and covered with setae. Cercal plate fused; baciliform process twisted at base and forked at apex; surstyli short, simple and median (respect to epandrium) and strongly curved.

Female: body length 3.6 mm. Differs from male as follows:

Head: Ocellar triangle long, extending up to lower orb. Frons and vitta broad, the distance between eye margins wider than 0.33x head width. Seven to eight fr with few shorter setulae in between. Upper and lower orb present, with 1 irregular row of fronto-orbital setulae.

Legs: F2 with 1 row of very short and thin av and pv. T 2 straight, cone-shaped, the base narrower than apex; pubescence on ventral surface absent.

Abdomen: Heart-shaped, tergite 2 over 2x width of tergite 4, this shape more pronounced than in male.

Grey, trimaculated with brown markings on tergites 2 to 4.

Postabdomen: Cerci normal, short. Anal plate broader than long and covered with setae throughout; sternite 8 reduced to an anterior plate bearing three to four setae; post abdominal spiracles 7 and 8 on tergite 6. Two pear-shaped spermathecae, with partially sclerotized ducts.

Distribution: NEOTROPICAL: Northern Chile and Brazil.