Mesembrinella brunnipes Surcouf, 1919

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: 119-120

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Mesembrinella brunnipes Surcouf, 1919


Mesembrinella brunnipes Surcouf, 1919  

( Figs 65–66 View FIGURES 63–68 , 155–156 View FIGURES 153–162 , 220 View FIGURES 216–221 , 263 View FIGURES 252–265 , 307 View FIGURES 306–311 , 351 View FIGURES 350–369 , 392 View FIGURES 370–400 , 436 View FIGURES 424–438 , 488 View FIGURE 488 )

Mesembrinella brunnipes Surcouf, 1919: 78   . Lectotype female (MNHN), not examined. Type locality: Bolivia. [NB: Guimar „es (1977) noted that Surcouf did not select a holotype, so he designated a lectotype from one of three conspecific female syntypes from Bolivia.]

Mesembrinella brunnipes: Peris & Mariluis (1984: 260)   ; Kosmann et al. (2013: 78); Wolff (2013: 121); Marinho et al. (2017: tab. 1); Cerretti et al. (2017: tab. 2).

Diagnosis. A fairly large brown fly averaging 12 mm (11–13/3) in length. Postpronotal lobe 3x 3; stem vein bare dorsally; wing infuscated; dorsum of abdomen without pits; supravibrissal setae dark brown or black; subcostal sclerite setose; section IV of wing 0.31 of section III; mid and hind femora with basal 1/4–1/2 brown, apical 1/2–3/4 orange; whitish tomentum on abdomen uniform on T1+2–4 vs. the similar M. townsendi   , which has pale tomentum in oblique streaks. This species resembles M. bicolor   , but has wing with strong, dark infuscated area along costa to R 2+3 instead of wing hyaline with yellowish area along costa.

Redescription. Male. Head. Frons 0.02/1 of head width at narrowest. Fronto-orbital and parafacial pale orange with pale tomentum, frontal seta ascending about 1/3 of distance to vertex; frontal vitta orange, obliterated in upper 2/3; gena: anterior half orange with pale orange tomentum, posterior half orange with silvery tomentum; postgena orange with silvery tomentum; gena and postgena with dark setae, except rear edge of postgena with pale setae; occiput with pale gold tomentum and pale gold setae; median occipital sclerite shiny dark orange; antenna dark orange; palpus typical; eye with median facets about 3x size of lateral facets; ocellar triangle small with ocelli about equal in size; supravibrissal setae dark, ascending about 1/5 of distance to antennal base.

Thorax. Dorsum shiny brown with pale tomentose stripes; pleura dark reddish with pale tomentum; chaetotaxy: ac 2:3, anteriormost postsutural setae may be lacking on one side, dc 2:3, ia 1, ph 1, ppn 3x 3, kat 1:1 or 2:1, meral setae typical, 1 ap converging slightly, sa absent, 2 very weak lat, 1 stout bas, 1 weak pb, 1 disc; subscutellum moderately developed; spiracles medium, pale yellow; legs brown except mid and hind femora with apical 1/4–1/2 orange. Wing heavily infuscated along anterior edge from costa to R 2+3; subcostal sclerite with dark setae; basicosta and tegula orange; section IV 0.31 (0.303 –0.313 /3) of section III; discs of calypters light tan; rim of upper calypter light tan with short reddish setae; rim of lower calypter yellow with long pale-yellow setae.

Abdomen. T1+2 yellow-brown, T3–5 purple-blue with pale tomentum, row of marginal setae on T4; T5 without marginal setae. Terminalia in lateral view with surstylus moderately curved backward ( Fig. 65 View FIGURES 63–68 ); in posterior view cerci short and stout ( Fig. 66 View FIGURES 63–68 ); phallus in lateral view with tiny, short epiphallus ( Fig. 155 View FIGURES 153–162 ); in dorsal view, hypophallic lobes rectangular with prominent coarse serrations along edge ( Fig. 156 View FIGURES 153–162 ); T6, STS7+8, pre- and postgonite, ejaculatory sclerite, ST6 and hypandrium as in Fig. 220 View FIGURES 216–221 ; ST1–5 broad, as in Fig. 263 View FIGURES 252–265 .

Female. Similar to male except frons 0.27 (0.26–0.28/2) of head width at narrowest. T6 of WV shape; T7 slen- der, divided midway; T8 as separate sclerites ( Fig. 307 View FIGURES 306–311 ); ST6–8 and hypoproct as in Fig. 351 View FIGURES 350–369 ; spermathecae filiform ( Fig. 392 View FIGURES 370–400 ); ST1–5 as in Fig. 436 View FIGURES 424–438 .

Type material examined. PARALECTOTYPE: Bolivia. ♀   *, “ Bolivien,” [only country listed] ( USNM)   .

Additional material examined. Bolivia, La Paz. 1 ♂♦* ( TLW430)   , Sud Yungas, Puente Villa, Hotel Tamam- paya, 4300 ft, 19–24–1989, Flight intercept trap, J.E. Eger ( FSCA)   ; Peru, Cusco. 1 ♀ ♦* ( TLW429)   , Paucatambo , Puente   , San Pedro 50 km NW Pilocapata , 3.ix.1988, 1600 m, A. Freidberg ( LACM)   ; 1♀, Cock-of-the Rock Lodge, Loop Trail , 13°3ʹ21ʺW 71°32ʹ46ʺW, 1450 m, 6.xii.2011, dung bait, debu00340874, S.A. Marshall ( UGG)   .

Distribution. Bolivia, Peru.

Remarks. Two specimens ( TLW 429–430) were barcoded, and clustered together ( Fig. 488 View FIGURE 488 ).


Smithsonian Institution, National Museum of Natural History


Florida State Collection of Arthropods, The Museum of Entomology


Natural History Museum of Los Angeles County


University of Guam














Mesembrinella brunnipes Surcouf, 1919

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

Mesembrinella brunnipes:

Kosmann, C. & Pinto de Mello, R. & Harterreiten-Souza, E. S. & Pujol-Luz, J. R. 2013: 78
Peris, S. V. & Mariluis, J. C. 1984: 260

Mesembrinella brunnipes Surcouf, 1919: 78

Surcouf, J. M. R. 1919: 78