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

Mesembrinella brunnipes Surcouf, 1919

( Figs 65–66 , 155–156 , 220 , 263 , 307 , 351 , 392 , 436 , 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 ); in posterior view cerci short and stout ( Fig. 66 ); phallus in lateral view with tiny, short epiphallus ( Fig. 155 ); in dorsal view, hypophallic lobes rectangular with prominent coarse serrations along edge ( Fig. 156 ); T6, STS7+8, pre- and postgonite, ejaculatory sclerite, ST6 and hypandrium as in Fig. 220 ; ST1–5 broad, as in Fig. 263 .

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 ); ST6–8 and hypoproct as in Fig. 351 ; spermathecae filiform ( Fig. 392 ); ST1–5 as in Fig. 436 .

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 ).

Figures

FIGURE 488. Neighbor-joining tree of COI DNA barcode sequences of specimens and species of Mesembrinellidae, using K2P distances and generated in BOLD; species names on the tree are followed by BOLD accession number, voucher number, country of origin, number of sequenced base pairs and number of ambiguous nucleotides.

FIGURES 63–68. Left lateral and posterior views of epandrium, cerci and surstyli of Mesembrinella spp. 63–64. M. bicolor (Fabricius). 65–66. M. brunnipes Surcouf. 67–68. M. bullata sp. nov.

FIGURES 153–162. Left lateral and dorsal views of phallus of Mesembrinella spp. 153–154. M. bicolor (Fabricius). 155–156. M. brunnipes Surcouf. 157–158. M. bullata sp. nov. 159–160. M. chantryi sp. nov. 161–162. M. currani Guimar„es.

FIGURES 216–221. Male terminalia of Mesembrinella spp. (a = T6, STS7+8; b = pre- and postgonite; c = ejaculatory sclerite; d = ST6; e = hypandrium). 216. M. batesi Aldrich. 217. M. bellardiana Aldrich. 218. M. benoisti (Séguy). 219. M. bicolor (Fabricius). 220. M. brunnipes Surcouf. 221. M. bullata sp. nov.

FIGURES 252–265. Male sternites of Mesembrinella spp. 252. M. nigrocoerulea sp. nov. 253. M. purpurata Aldrich. 254. M. semiflava Aldrich. 255. M. uniseta Aldrich. 256. M. violacea sp. nov. 257. M. vogelsangi (Mello). 258. M. zurquiensis sp. nov. 259. M. batesi Aldrich. 260. M. bellardiana Aldrich. 261. M. benoisti (Séguy). 262. M. bicolor (Fabricius). 263. M. brunnipes Surcouf. 264. M. bullata sp. nov. 265. M. chantryi sp. nov.

FIGURES 306–311. Female terminalia (T6–T8, epiproct, cerci) of Mesembrinella spp., dorsal view. 306. M. bicolor (Fabricius). 307. M. brunnipes Surcouf 308. M. bullata sp. nov. 309. M. chantryi sp. nov. 310. M. currani Guimar„es. 311. M. cyaneicincta (Surcouf).

FIGURES 350–369. ST6–8 and hypoproct of Mesembrinellidae. 350. M. bicolor (Fabricius). 351. M. brunnipes Surcouf. 352. M. bullata sp. nov. 353. M. chantryi sp. nov. 354. M. currani Guimar„es. 355. M. cyaneicincta (Surcouf). 356. M. flavicrura Aldrich. 357. M. longicercus sp. nov. 358. M. peregrina Aldrich. 359. M. pictipennis Aldrich. 360. M. quadrilineata (Fabricius). 361. M. randa (Walker). 362. M. semihyalina Mello. 363. M. serrata sp. nov. 364. M. socors (Walker). 365. M. townsendi Guimar„es. 366. M. umbrosa Aldrich. 367. M. velasquezae sp. nov. 368. M. anomala (Guimar„es). 369. Souzalopesiella facialis (Aldrich).

FIGURES 370–400. Spermathecae of Mesembrinellidae. 370. L. fusconitida sp. nov. 371. L. fuscosquamata sp. nov. 372. L. nigripes Guimar„es. 373. L. perisi (Mariluis). 374. L. purpurea sp. nov. 375. Mesembrinella guaramacalensis sp. nov. 376. M. mexicana sp. nov. 377. M. spicata Aldrich. 378. M. aeneiventris (Wiedemann). 379. M. decrepita Séguy. 380. M. lara (Bonatto). 381. M. nigrocoerulea sp. nov. 382. M. purpurata Aldrich. 383. M. semiflava Aldrich. 384. M. uniseta Aldrich. 385. M. vogelsangi (Mello). 386. M. zurquiensis sp. nov. 387. M. apollinaris Séguy. 388. M. batesi Aldrich. 389. M. bellardiana Aldrich. 390. M. benoisti (Séguy). 391. M. bicolor (Fabricius). 392. M. brunnipes Surcouf. 393. M. bullata sp. nov. 394. M. chantryi sp. nov. 395. M. currani Guimar„es. 396. M. cyaneicincta (Surcouf). 397. M. flavicrura Aldrich. 398. M. longicercus sp. nov. 399. M. peregrina Aldrich. 400. M. pictipennis Aldrich.

FIGURES 424–438. Female sternites of Mesembrinella spp. 424. M. nigrocoerulea sp. nov. 425. M. purpurata Aldrich. 426. M. semiflava Aldrich. 427. M. uniseta Aldrich. 428. M. violacea sp. nov. 429. M. vogelsangi (Mello). 430. M. zurquiensis sp. nov. 431. M. apollinaris Séguy. 432. M. batesi Aldrich. 433. M. bellardiana Aldrich. 434. M. benoisti (Séguy). 435. M. bicolor (Fabricius). 436. M. brunnipes Surcouf. 437. M. bullata sp. nov. 438. M. chantryi sp. nov.