Mesembrinella latifrons ( Mello, 1967 ), Mello, 1967

Whitworth, Terry L. & Yusseff-Vanegas, Sohath, 2019, A revision of the genera and species of the Neotropical family Mesembrinellidae (Diptera: Oestroidea), Zootaxa 4659 (1), pp. 1-146: 48-49

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Mesembrinella latifrons ( Mello, 1967 )


Mesembrinella latifrons ( Mello, 1967)  

( Figs 25–26 View FIGURES 21–26 , 115–116 View FIGURES 115–124 , 200 View FIGURES 195–201 , 244 View FIGURES 239–251 , 287 View FIGURES 282–287 , 331 View FIGURES 326–349 , 416 View FIGURES 411–423 )

Albuquerquea latifrons Mello, 1967: 10   . Holotype male (FIOC), not examined. Type locality: Petrópolis , Rio de Janeiro, Brazil.

Albuquerquea latifrons: Toma & Carvalho (1995: 138)   ; Kosmann et al. (2013: 77); Marinho et al. (2017: tab. 1).

Mesembrinella latifrons: Cerretti et al. (2017   : tab. 2).

Diagnosis. A small to medium-sized reddish-brown fly, averaging 9.4 mm (8–11/5) in length. T5 with faint bluish reflections; dorsum of stem vein setose, with sparse, dark setae; anterior edge of wing with dark infuscation; subcostal sclerite with long golden setae. This species resembles M. bellardiana   , but in M. latifrons   wing section IV 0.28 of section III, while in M. bellardiana   , wing section IV 0.67 of section III. Male frons broad, 0.195 of head width, at narrowest, while it is much narrower in males of M. bellardiana   (0.05 of head width at narrowest). Epandrium, cerci and surstyli in posterior view are distinctive, distal third of surstylus with 90° bend in posterior view ( Fig. 26 View FIGURES 21–26 ).

Redescription. Male. Head. Frons broad, 0.195 (0.19–0.20/2) of head width at narrowest; fronto-orbital orange with short row of weak frontal setae ascending about halfway to vertex; parafacial bare and pale gold; gena of pale orange ground color, covered with fine orange setae and with short horizontal row of dark, stouter setae; postgena like gena but with longer golden setae; occiput with silvery tomentum and pale orange setae; postocular with row of short, dark setae; median occipital sclerite shiny orange; palpus typical; eye facets uniformly small; ocellar triangle medium-sized, anterior ocellus slightly larger than posterior ocelli; supravibrissal setae orange, ascending about halfway up facial ridge.

Dorsum of thorax dark orange with faint narrow pale stripes of tomentum alternating with bare orange areas; pleural area pale orange; ac, 2:1; dc, 2:3;ia, 2; ph, 1; ppn, 3x 3; kat, 2:1, meral setae in straight line, without horizontal portion, the upper seta slightly anterior to line; 1 pair parallel ap; 0 sa,0 lat; 1 stout bas; weak pb; 1 disc; subscutellum weakly developed; spiracles small and pale orange; upper and lower calypters pale orange; rim of upper calypter sooty with reddish setae, rim of lower calypter white, also with reddish setae; legs entirely orange. Wing: anterior edge with long dark infuscation along costa; subcostal sclerite with long golden cilia; basicosta and tegula orange; dorsum of stem vein with a few dark setae; section IV 0.28 of section III.

Abdomen. T3 with pair of lateral marginal setae; T4–5 each with row of stout marginal setae; whole surface of T5 disc with medium length, sparse, weak setae. Terminalia in lateral view with surstylus sharply curved backward ( Fig. 25 View FIGURES 21–26 ); in posterior view surstyli with 90° bend in lower third, cerci ending in abrupt tip ( Fig. 26 View FIGURES 21–26 ); phallus in lateral view with epiphallus sharply curved posteriorly ( Fig. 115 View FIGURES 115–124 ); in dorsal view, hypophallic lobes bulging well beyond paraphallic hooks laterally ( Fig. 116 View FIGURES 115–124 ); T6, STS7+8, pre- and postgonite and ejaculatory sclerite as in Fig. 200 View FIGURES 195–201 ; ST1–5 as in Fig. 244 View FIGURES 239–251 .

Female. Similar to male except frons fairly narrow, 0.256 (0.25–0.26/3) of head width at narrowest. T6 exceptionally thick, of RV shape; T7 continuous, narrowed midway below; T8 as separate sclerites ( Fig. 287 View FIGURES 282–287 ); ST6–8 and hypoproct as in Fig. 331 View FIGURES 326–349 ; spermathecae filiform (not found in dissection, but Guimar„es (1977) confirmed filiform); ST1–5 as in Fig. 416 View FIGURES 411–423 .

Material examined. Brazil, Rio de Janeiro. 1 ♂*, 1 ♀, Dist. Federal , iv.1938, [no collector] ( NHMUK)   . Sao Paulo. 1 ♂*, Salesópolis, Estación Biológica Boracéia , 8.xi.1971, J.H. Guimarães ( NHMUK)   ; 1 ♀, same data ex- cept ii.1973, F.C. Vol ( LACM)   ; 1 ♂, Boracéia , 20.iii.1968, H.S. Lopes ( CNC)   .

Distribution. Brazil.

Remarks. This species is uncommon and few specimens were available for study. The male terminalia are distinctive. No specimens were barcoded.


Collection of Leptospira Strains


Natural History Museum, London


Natural History Museum of Los Angeles County


Canadian National Collection of Insects, Arachnids, and Nematodes














Mesembrinella latifrons ( Mello, 1967 )

Whitworth, Terry L. & Yusseff-Vanegas, Sohath 2019

Albuquerquea latifrons:

Kosmann, C. & Pinto de Mello, R. & Harterreiten-Souza, E. S. & Pujol-Luz, J. R. 2013: 77
Toma, R. & Carvalho, C. J. B. de 1995: 138

Albuquerquea latifrons

Mello, R. P. de 1967: 10