Fannia incisurata ( Zetterstedt, 1838 )

Abstract, Martha Cecilia Dominguez, 2007, A taxonomic revision of the Southern South American species of the genus FANNIA Robineau-Desvoidy (Diptera: Fanniidae) Martha Cecilia Dominguez ABSTRACT, Papéis Avulsos de Zoologia 47 (24), pp. 289-347 : 322-323

Fannia incisurata ( Zetterstedt, 1838)

Fig. 12

Anthomyza incisurata Zetterstedt, 1838:679 .

Fannia incisurata ; James, 1947:128; Hennig, 1955b; 1955c; Chillcott, 1961:55; Pont, 1972:5; Carvalho et al., 1993:11; RozkoŠný et al., 1997:40; Carvalho et al., 2003:13 .

Fannia pruinosa Shannon & Del Ponte, 1926:572 . [Junior secondary homonym in Fannia of Anthomyia pruinosa Meigen, 1826 ]; Gaminara 1930:1253; 1931:1253; Malloch 1934:203; Séguy 1937:173. Synonymy by Malloch 1934:203.

Description

Male: body length 6.5 mm

Head: Frontal vitta dark grey, at narrowest point 0.6x width of anterior ocellus. Frontoorbital plate heavily silvery-grey pruinose, at uppermost fr 0.75x width of anterior ocellus. Nine to 12 long fr, 2.6x length of flagellum, with several interstitial setulae. Eye bare, antero-internal facets larger than remaining; pocl in two well defined rows. Face and parafacial silvery-grey; parafacial at base of flagellum as wide as same and bare. Facial carina silvery-brown. Gena grey. Scape and pedicel dark brown, flagellum short, 2.3x as long as wide, heavily silvery-grey pruinose. Arista dark-brown, short pubescent. Palpus dark-brown, apex about 1.5x width of base. Lower oral margin straight, grooveless.

Thorax: Scutum dark-grey in ground colour, covered with light blue-grey pruinosity, brown vitta visible in full length between acr and dc lines, dc and ia lines and between ia lines and pleura; pleura light grey; 3+4 Diagnosis: Medium dark grey species. Frontal vitta at narrowest point 0.6x width of anterior ocellus. Eye and parafacial bare. Antenna and palpus dark-brown. Scutum dark-grey in ground colour, covered with light blue-grey pruinosity, brown vitta visible in full length between acr and dc, dc and ia and between ia and pleura. One pra near spal, 0.2x length of same. T2 thin, constricted at base, lacking subbasal protuberance. C3 with 1 p at apex of posterior margin. F3 normal, lacking preapical protuberance on posteroventral surface. T3 with 7 to 8 medial ad; 5 to 7 medial av, and 4 to 6 pv in medial third. Wing clear. Halter yellow. Abdomen elongated, dark grey, slightly lighter on anterior lateral margins of tergites 2, 3, and 4.

Type material examined: Fannia pruinosa : co-type o Argentina: Buenos Aires, San Isidro. 25-VIII-1926. Shannon & Del Ponte ( USNM) .

Other material examined: Argentina. Catamarca 1 o, 2 n, 31-V-1927, col. Kisliuk ( USNM). 1 o, Homlomyia incisurata (FMNH) .

acr; 1 prescutellar acrs; pprn covered with setulae; 1 pra near spal, 0.2x length of spal; prealar area covered with setulae; 2 prepm surrounded with setulae.

Legs: Brown to dark-brown, tibiae yellow at base. F1 normal (length/width = 5); with 1 row of pv; 2 rows of p; 1 row of pv in apical half. Fore tibia with 1 subapical pd; 1 apical v and 1 apical pv; 1 submedial and 1 apical ad, lacking medial row. Fore tarsomere 1 slightly longer than 0.3x tibial length; tarsomere 4 as broad as long. F2 with 1 row of ad and 2 rows of short a; 1 row of short and thin av; 1 row of hair-like pv, duplicated in medial third, simple at apex; 1 row of long and hair like p, stouter and ventrally directed at apex. T2 thin, constricted at base, lacking subbasal protuberance, ventral pubescence very short, 0.2x femoral width; 1 submedial and 3 long apical a; 1 subapical ad; 1 very strong apical av; 1 long submedial and 1 apical pd; 1 apical pv and 1 long p. C3 with a single setae at apex of posterior margin. F3 normal (length/width = 5.4); lacking preapical protuberance on pv; 1 row of ad longer and dorsally directed towards apex; 1 row of short av and 4 av as long or longer than femoral width in apical fourth; 1 row of very short pv, less than 0.25x femoral width ( Fig. 12). T3 with 1 submedial and 1 subapical d; 1 submedial, 1 apical and 7 to 8 medial ad; 5 to 7 medial and 1 short apical av; 4 to 6 pv in medial third; ventral and posteroventral surface with a weak ctenidium ( Fig 12).

Wing: Clear. Lower calpyter slightly oval, lower rounded, both yellowish-white. Knob of halter yellow, pedicel and base yellow.brown.

Abdomen: Elongated, width of tergites approximately equal. Dark grey, slightly lighter on anterior lateral margins of tergites 2, 3, and 4. Hypopygium not protruding.

Postabdomen: Posterior margin of sternite 5 straight or very slightly indented, setae grouped on central longitudinal line and posterior margin. Anterior margin of epandrium narrower than central region. Cercal plate fused. Bacilliform process cork-screw shaped. Surstily short, simple, and marginal. Hypandrium arms directed outwards. Postgonites inconspicuous. aedeagus membranous.

Female: body length 6.7 mm. Differs from male as follows:

Head: Vitta grey-brown. Ocellar triangle very short, extending up to uppermost fr. Frons and vitta broad, the distance between eye margins wider than 0.33x head width. Seven fr, variable in length, 2 to 3 longer than flagellum, remaining shorter. Upper and lower orb present, with 2 rows of fronto-orbital setulae; pocl short and of irregular length, less than 0.33x length of inner and outer verticals, the latter longer than in male.

Thorax: Lacking vitta.

Legs: F1 with 4 rows of p, 1 row as long as row of pd, remaining 3 short. F2 with 5 to 6 rows of short and thin a; 1 row of av, long at base, shorter at apex; 1 row of pv, 0.5x width of femur at base, shorter at apex. T2 cone-shaped, lacking ventral pubescence. C3 with 2 hair-like p at apex of posterior margin. T3 with 1 apical and 4 medial short av.

Abdomen: Heart-shaped, elongated, tergite 4 less than 0.5x width of tergite 2, dark grey throughout.

Postabdomen: Cerci normal, short; anal plate broader than long and uniformly covered with setulae; sternite 8 reduced to 1 posterior pair of plates bearing two setulae; post abdominal spiracle 7 situated beyond posterior margin of tergite 6 and spiracle 8 on anterior margin of tergite 6). Three smooth pear-shaped spermathecae, with partially sclerotized ducts.

Distribution: Cosmopolitan.