Fannia pusio ( Wiedemann, 1830 )

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 : 331-332

Fannia pusio ( Wiedemann, 1830)

Figs. 16 A-C

Anthomyia pusio Wiedemann 1830:437 .

Limnophora exilis Williston, 1896:369 . Synonyny by Snyder 1965:273.

Atomogaster pusio ; Macquart, 1843a.

Homalomyia femorata Loew, 1861:42 ; Johnson, 1908:77. Synonymy by Johnson, 1914:448.

Mesazelia trichopoda Blanchard, 1942:57 ; 1963:135. Synonymy by Carvalho et al., 2003:18.

Fannia pusio ; Stein 1911:108; Malloch, 1913:623; Stein, 1919:131-132; Curran, 1934:164; Roberts, 1934:253; Wollcott, 1936:369; Séguy, 1937:113; Ortiz, 1946:157; Wollcott, 1948:497; Seago, 1954:8; Berry & Vaquero, 1957:60; Chillcott, 1961:213; Garcia, 1964; Huckett, 1965:896; Pont, 1972:6; Campos & Peña, 1973:227; Gregor, 1975:58; Linhares, 1978:603; Albuquerque et al., 1981:10; Linhares, 1981:232; Alayo & García, 1983:110; Oliveira, 1986:311; Monteiro-Filho & Penereiro, 1987:293; Couri & Pamplona, 1991:119; Couri, 1992a:85-88; 1992b:59-67; Carvalho et al., 1993:14; Lomônaco & Prado, 1994:71-79; Marchiori & Prado, 1995:571-575; Campos & Barros, 1995:351-354; Lomônaco & Almeida, 1995a:883-890; Lomônaco & Almeida, 1995b:891-896; Marchiori & Prado, 1996a:93-98; 1996b:573-576; Pinto & Brum, 1998:135-137; Paes-Santos & Moya Borja, 1997:253-261; RozkoŠný et al., 1997:45; Marchiori & Prado, 1999:557-563; Marchiori et al., 2000:350-353; Marchiori et al., 2000:354-356 Marchiori et al., 2000a:354-356; 2000b:459-460; Marchiori & Silva, 2001:187-189; Marchiori et al., 2002:101-102; Carvalho et al., 2002:108; Carvalho et al., 2003:17; Gomes et al., 2002:114-118; Marchiori et al., 2002:101-102; Mendes & Linhares, 2002:37; Freitas Al Gazi et al., 2004:169-180

Fannia exilis ; Stein 1919:131; Séguy, 1937:167; Pont, 1972:4.

Fannia trimaculata Stein sensu Albuquerque, 1945b:1-11 .

Fannia trichopoda ; Pont, 1972:6; Blanchard, 1975:10; Carvalho et al., 1993:16.

Diagnosis: Small black species. Frontal vitta at narrowest point 0.6x width of anterior ocellus. Eye bare. Parafacial setulose. Antenna dark grey. Palpus brown. Two short and stout pral, near the transverse suture near spal. T 2 thin, basally constricted and with a very weak subbasal protuberance. C3 with 2 short hair-like setulae at apex of posterior surface, with a subapical tuft of long and curled pv, coinciding with protuberance. T 3 with long hair-like setae, 3x width of t3, covering entire anteroventral, ventral and posteroventral surfaces. Wing clear. Halter yellowish-white. Abdomen elongated and trimaculated.

Type material examined: Mesazelia trichopoda . Lectotype (by present designation): o, middle specimen of three, labelled: “ Argentina / Tucumán ”; “Alabama/argillacea”; “3523”; “ Mesazelia / trichopoda /Blanchard/ Det. E. E. Blanchard ” ( CICVYA) . – Paralectotypes (by present designation): 2 o upper and lower specimens on same pin as lectotype ( CICVYA) .

Other material examined: Mexico: 1 n, Tampica Tan , 7-V-1931, col. R. A. Roberts ( USNMNH) . Bahamas: 1 o, Nassau, col. Fred Kanb. ( USNMNH) . Guatemala: 1 o, 1 n, Amatillan, 1926, col. Salas ( USNMNH) . Peru: 1 o, 1 n, Tingo Maria , 1-XI-1946, col. W. Weycuacn. ( FIML) ; 2 o, Lima, 19-IX-1954 ( FIML) .

Description

Male: body length 3.7-4.5 mm.

Head: Frontal vitta black, at narrowest point 0.6x width of anterior ocellus. Frons covered with heavy silvery grey pruinescence, at uppermost fr 0.7x width of anterior ocellus. Ten to 13 short fr, 0.8x length of flagellum. Eye bare, antero-internal facets larger than remaining; pocl in a single row and of regular length. Face and parafacial silvery grey; parafacial at base of flagellum 0.2x width of same and with short setulae throughout. Facial carina and gena dark grey. Scape and pedicel dark grey, flagellum short and thin, 2 to 2.5x as long as wide and covered with heavy silvery grey pruinescence. Palpus brown, the apex as broad as base. Arista brown, short pubescent. Lower oral margin concave, grooveless.

Thorax: Scutum and sctutellum dark brown to black; 3+3 acr; 2 prescutellar acrs; 2+3 dc; pprn covered with short setulae; 2 short and stout pra, one near the transverse suture and other near spal; lacking ground setulae in prealar area; 2 prepm lacking surrounding setulae.

Legs: Completely brown. F1 normal to globose (length/width = 4.3), with 1 row of pd; 2 rows of a; 1 row of pv short and thin at base, stouter towards apex. T 1 with 1 subapical pd; 1 apical v and 1 apical pv. Fore tarsomere 1 shorter than 0.3x length of T 1, tarsomere 4 as wide as long. F2 with 1 row of ad; 3 rows of a; 1 row of av as long as femoral width; 1 row of pv thin at base and 2 to 3 rows of shorter, stouter and hooked pv at apex; 1 row of thin p, stouter and ventrally directed towards apex. T 2, thin, basally constricted, with a very weak subbasal protuberance; pubescence on ventral surface very long, slightly shorter than tibial width; 1 subapical ad; 1 submedial and 3 apical a; 1 strong apical av-v; 1 submedial and 1 apical pd; 1 apical pv; 1 apical p. C3 with 2 short hair-like p at apex of posterior surface. F3 normal (length/width = 5.4) with a weak preapical protuberance on posteroventral surface; with 1 row of ad, longer and dorsally directed towards apex; 1 complete row of av, shorter than femoral width and 4 to 5 apical av longer than femoral width; 1 subapical tuft of long and curled pv, coinciding with protuberance. T 3 with 1 submedial and 1 subapical d; long hair-like setae, 3x width of T 3, covering entire anteroventral, ventral and posteroventral surfaces; 1 short apical av; ventral and posteroventral surfaces with a weak ctenidium at apex.

Wing: Clear, both calypteres rounded and yellowish-white. Knob of halter yellowish-white, stalk and base light brown.

Abdomen: Elongated, tergites width approximately equal; dark brown, tergites 2, 3 and 4 trimaculated. Hypopygium not protruding.

Postabdomen: Posterior margin of sternite 5 straight, setae occupying central longitudinal line, weak on posterior margin ( Fig. 16A ). Hypandrial arms directed inwards, and directly connected to hypandrium; postgonite reduced to small stubs at both sides of aedeagus; epiphallus present, projecting dorsally beyond cercal plate ( Fig. 16B ). Epandrium wider than long, narrower in anterior region; cercal plate weakly fused; bacilliform process absent; surstyli marginal respect to epandrium and formed by a central and a very short ventral-lateral process bearing few short setulae; surstyli broadly connected to epandrium ( Fig. 16C ).

Female: body length 4.8-5.2 mm. Differs from male as follows:

Head: Frontal vitta with heavy grey-brown pruinescence. Ocellar triangle long, extending up to third fr. Fronto-orbital plate silvery pruinose, pruinescence denser near eye margins and disappearing near vitta, where it becomes reddish-brown. Frons and vitta broad, the distance between eye margins is 0.33x head width. Antero-internal facets as large as remaining. Three to four short fr, 0.7x length of flagellum and 4 to 5 shorter interstitial setulae. Upper and lower orb present, and 1 row of long fronto-orbital setulae; pocl of regular length and short, less than 0.5x length of outer and inner verticals, the latter longer than in male.

Legs: F2 with 5 to 6 rows of short and thin a; 1 row of short av; row of pv short. T 2 straight, base as broad as apex; ventral pubescence absent. F3 lacking preapical protuberance; 1 row of short av, 1 or 2 subapical av longer than femoral width. T 3 with 2 medial and 1 short apical av; ctenidium on ventral and posteroventral surfaces conspicuous.

Postabdomen: Cerci normal, short; anal plate as broad as long and uniformly covered with setulae; sternite 8 reduced to 1 posterior pair of small plates bearing setulae; post abdominal spiracles 7 and 8 on tergite 6. Two oval and wrinkled spermathecae, with partially sclerotized ducts.

Distribution: COSMOPOLITAN.

Figures

FIGURE 16: Fannia pusio Wiedemann. A. Male hind femur, anterior. B. Male sternite 5, ventral. C. Male hypandrium, ventral. D. Male terminalia external structures, ventral. E. Female terminalia external structures, ventral. F. Spermathecae.