Fannia petrocchiae 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 : 326-328

Fannia petrocchiae Shannon & Del Ponte, 1926

Figs. 14 A-F

Fannia petrocchiae Shannon & Del Ponte, 1926:574 ; 1928:142; Malloch, 1934:207; Séguy, 1937:173; Lopes, 1938:427; Albuquerque, 1945a:1-4; Pont, 1972:5; Albuquerque et al., 1981:17; Carvalho et al., 1993:13; Guimarães & Papavero, 1999:266; Carvalho et al., 2002:112; 2003:16.

Fannia solitaris Shannon & Del Ponte, 1926:565 . Sinonymy by Shannon & Del Ponte 1928:142.

Diagnosis: Small light grey species. Frontal vitta at narrowest point 2x width of anterior ocellus. Parafacial with very strong setulae throughout. Antenna and palpus yellowish-brown. Thorax light grey, with very thin brown vitta along acr and dc lines. 2 pra near spal, one strong, the second shorter and thiner. T 2 cone shaped, gradually broadened towards apex. C3 with two p at apex of posterior surface. F3 lacking preapical protuberance of posteroventral surface. T 3 with very long submedial and subapical d. One submedial ad. Abdomen elongated, tergites 1 to 4 yellow on anterior lateral margins and trimaculated.

Material examined: Brazil: 1 n Amazonas Manaus , V-1931, col. R . C. Shannon ( BMNH). 1 o Goiás, Campinas 1 o, XII-1935, cols. Borgmeier & S. Lopez ( BMNH). 1 n Mato Grosso, Base camp, 15-II a 8-III-1968, col. B. E. Freeman ( BMNH) .

Description

Male: body length 3.5 mm.

Head: Frontal vitta dark brown, yellow near lunula, at narrowest point 2x width of anterior ocellus. Fronto-orbital plate heavily silvery pruinose, at uppermost fr as wide as anterior ocellus. Six short fr, 1.9x length of flagellum. Eye bare; pocl of irregular length in first quarter. Face and parafacial silvery-grey; parafacial at base of flagellum as wide as same, with very strong setulae throughout. Facial carina light brown, gena silvery-grey. Scape and pedicel yellowish-brown, flagellum 2.4x as long as broad and covered with darkyellow pruinescence. Arista yellowish-brown, short pubescent. Palpus yellowish-brown, clavate, the apex 1.5x width of base. Lower oral margin straight and grooveless.

Thorax: Light grey, with very thin (almost imperceptible) brown vitta along acr and dc lines; pleura grey; apex of scutellum slightly yellowish; 2+2 acr, with additional acr in apical 1/3 and 1 prescutellar acrs; 2+3 dc; pprn with numerous short setae; 2 pra near spal, one strong, the second shorter and thinner; prealar area bare; 2 prepm surrounded by 5 setulae.

Legs: Coxae and tibiae yellow, femora light brown and yellow at apex, tarsi black. F1 globose (length/ width = 4.7); 1 row of pd as long as femoral width; 2 rows of p, dorsal row longer; 1 row of pv, short at base and longer than femoral width at apex. T 1 with 1 subapical pd, 1 apical v and 1 apical pv; 1 row of very short ad. Fore tarsomere 1 0.3x length of t1, tarsomere 4 as long as wide. F2 with 1 row of ad; 3 apical and 1 row of a; 1 row of av, hair-like at base, stouter and shorter at apex; 1 row of pv, duplicated or triplicated and hooked at apex, forming a ctenidium; 1 row of p, thin at base, stouter and ventrally displaced at apex. T 2 cone-shaped, gradually broadened towards apex; long and very thin ventral pubescence, as long as femoral width; 3 submedial a; 3 submedial ad; 1 strong apical av-v; 2 submedial and 1 reduced apical pd; 1 apical p; 1 apical pv. C3 with 2 p at apex of posterior surface. F3 normal to globose (length/width = 5.5), lacking preapical protuberance of posteroventral surface; 1 row of ad, longer and dorsally directed at apex; 1 row of av shorter than femoral width and 2 to 3 longer preapical av; 1 row of delicate pv, which forms a weak preapical tuft. T 3 with 1 long submedial and 1 subapical d; 1 submedial and 1 apical ad, lacking medial row; 1 to 3 medial and 1 apical av; apex of ventral and posteroventral surface with a weak ctenidium.

Wing: Clear, yellow tinted.Lower calypter strongly oval, upper rounded, both white. Halter whitish-yellow.

Abdomen: Elongated, tergites approximately of same width, except for tergites 2 and 3 which are broader. Tergites 1 to 4 translucent yellow on anterior lateral margins and trimaculated; tergite 5 grey with brown markings. Hypopygium not projecting.

Postabdomen: Sternite 5 heart-shaped, posterior margin profoundly indented, with few setulae on central longitudinal line and posterior margin ( Fig. 14A ). Hypandrial arms directed inwards; hypandrial base very broad, with grooved lateral margins; postgonite conspicuous at base of aedeagus, covered with setulae; aedeagal apodeme tube-shaped, forming a curved and bifid structure above cercal plate; phalic guide very short, almost indistinguishable, aedeagus sclerotized ( Fig. 14 B-D). Cercal plate weakly fused; bacilliform process very small, tooth-shaped; surstyli short, simple and on internal margin of epandrium; ( Fig. 17 C-D).

Female: body length 3.1 mm. Differs from male as follows:

Head: Ocellar triangle long, extending up to lower orb. Frons and vitta broad, the distance between eye margins less than 0.33x width of head. Four to five strong fr, slightly longer than flagellum, with 6 to 7 long interstitial setulae, 0.5x length of setae. Upper and lower orb present, with 1 irregular row of fronto-orbital setulae.

Legs: F2 with 1 row of short av; lacking row of pv. T 2 straight, cone-shaped, the base narrower than apex; ventral pubescence absent; 1 apical pv; 2 submedial p.

F3 preapical protuberance on posteroventral surface absent; lacking preapical tuft of pv.

Postabdomen: Cerci very short; anal plate very broad and uniformly covered with setulae; sternite 8 forming a single plate, lobated on posterior margin; sternite 7 rounded, with a crescent-shaped structure in anterior region, which connects ventral margins of tergite 7; post abdominal spiracles 7 and 8 on tergite 6 and 7, respectively ( Fig. 14E ). Two very grooved and pear-shaped spermathecae, with partially sclerotized ducts ( Fig. 14F ).

Distribution: NEOTROPICAL: Argentina, Brazil.

Figures

FIGURE 14: Fannia petrocchiae Shannon & Del Ponte. A. Male sternite 5, ventral. B. Male hypandrium, ventral. C. Male terminalia external structures, ventral. D. Male terminalia external structures, lateral. E. Female terminalia external structures, ventral. F. Spermathecae.

FIGURE 17: Fannia roigi sp nov. A. Male sternite 5, ventral. B. Male hypandrium, ventral. C. Male terminalia external structures, ventral. D. Male terminalia external structures, lateral.