Mesembrinella cyaneicincta ( 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 : 123-124

Mesembrinella cyaneicincta ( Surcouf, 1919)

( Figs 73–74 , 163–164 , 224 , 267 , 311 , 355 , 396 , 440 )

Ochromyia cyaneicincta Surcouf, 1919: 69 . Holotype female (MNHN), not examined. Type locality: Brazil.

Eumesembrinella cyaneicincta: Peris & Mariluis (1984: 264) ; Toma & Carvalho (1995: 141); Kosmann et al. (2013: 77); Wolff & Kosmann (2016: 866) ; Marinho et al. (2017: tab. 1).

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

Diagnosis. A fairly large dark fly averaging 13 mm (12–14/5) in length. Postpronotal lobe 2x 2; anterior margin of wing weakly infuscated from costa to beyond R 2+3; dorsum of thorax yellow-brown with pale tomentose stripes; T1+2–T5 with bluish-purple bands on posterior margin in good specimens. Epandrium, cerci and surstyli as in Figs 73–74 . Female terminalia as in Fig. 311 .

Redescription. Male. Head. Frons broad, 0.073 (0.07–0.08/3) of head width at narrowest, about 1/3 broader than width of parafacial at level of lunule. Fronto-orbital, frontal vitta, parafacial, gena and postgena pale orange with pale tomentum; fronto-orbital broad, frontal setae ascending 60% of distance to vertex; upper 2/3 of frontal vitta obliterated; gena with horizontal row of stout brown setae midway, otherwise with sparsely scattered small, dark setae; postgena with pale tomentum and golden setae; occiput with heavy pale yellow tomentum and dark yellow setae; median occipital sclerite shiny orange; proximal 1/3 of arista orange, distal 2/3 tan; palpus typical; eye with median facets about 2x size of lateral facets; ocellar triangle medium-sized, anterior ocellus about 2x size of posterior ocelli; short row of orange supravibrissal setae ascending about 1/6 of distance to antennal base.

Thorax. Dorsum yellow-brown with pale tomentose stripes, pleura orange with pale tomentum; chaetotaxy: ac 0:2, dc 2:3, ia 0, ph 1, ppn 2x 2, kat 1:1, meral setae fine and weak, typical, 1 pair of parallel ap, sa and lat absent, 1 bas, 1 weak pb, 1 disc; subscutellum weakly developed; spiracles small, yellow; fore leg entirely orange, mid- and rear tibiae and tarsi tan. Wing faintly infuscated from costa to vein R 1+2; subcostal sclerite with weak pubescence only; basicosta and tegula orange; section IV 0.22 of section III; upper and lower calypters pale orange; rim of upper calypter dark with short yellowish setae, rim of lower calypter pale with long, yellow setae.

Abdomen. Varying from blue to purple, sometimes reddish. T1+2–5 with purple bands at rear margin, bands on T1+2 and T5 often narrow, bands on T3–4 broader; disc of T5 with dense, medium-long, fine setae only. Terminalia in lateral view with surstylus curved sharply backward ( Fig. 73 ); in posterior view, base of cercus broad with uniform taper to tip, tip of surstylus sharply curved, almost at 90° angle ( Fig. 74 ); phallus in lateral view with moderate epiphallus, curved posteriorly ( Fig. 163 ); in dorsal view, hypophallic lobes wide midway, with fine serrations ( Fig. 164 ); T6, STS7+8, pre- and postgonite, ejaculatory sclerite, ST6 and hypandrium as in Fig. 224 ; ST2–5 slender, as in Fig. 267 .

Female. Similar to male except frons 0.266 (0.26–0.27/5) of head width at narrowest. T6 of OV shape; T7 continuous with suture midway; T8 as separate sclerites ( Fig. 311 ); ST6–8 and hypoproct as in Fig. 355 ; spermathecae filiform ( Fig. 396 ). ST2–5 as in Fig. 440 .

Material examined. Brazil, Bahia. 1 ♂*, Alcobaça , [located around 17°31ʹ08ʺS 39°11ʺ45ʹW, on east coast], ii.1971, P.C. Elias ( NHMUK) . Rio de Janeiro. 1 ♂*, 1 ♀, Tingua, Est. Rio. , vi.1940, R.C. Shannon ( USNM) ; 1 ♂♦ ( TLW393 ) , nr Desengano State PK, site #2, 6–10.v. 1999, 200 m, B.V. Brown ( LACM) . Rondônia. 1 ♀ ♦ ( TLW394 ) , 62 km, SE Ariquemes , 15–22.iii.1981, W. Hanson, G. Bohart ( LACM) . São Paulo. 1 ♂, 1 ♀ *, Registro , 2.xii.1965, R. Inoue ( CNC) .

Distribution. Brazil. Marinho et al. (2017) listed Colombia.

Remarks. No barcodes were obtained from specimens of this species in this study. Marinho et al. (2017) argued that the subspecific taxon Eumesembrinella cyaneicincta pauciseta Guimar „es, 1977 should be treated as a separate, valid species and that it would be treated as such in a forthcoming paper. We have not seen sufficient material to be able to comment on this issue.

Figures

FIGURES 69–74. Left lateral and posterior views of epandrium, cerci and surstyli of Mesembrinella spp. 69–70. M. chantryi sp. nov. 71–72. M. currani Guimar„es. 73–74. M. cyaneicincta (Surcouf).

FIGURES 163–172. Left lateral and dorsal views of phallus of Mesembrinella spp. 163–164. M. cyaneicincta (Surcouf). 165–166. M. flavicrura Aldrich. 167–168. M. longicercus sp. nov. 169–170. M. peregrina Aldrich. 171–172. M. pictipennis Aldrich.

FIGURES 222–228. Male terminalia of Mesembrinella spp. (a = T6, STS7+8; b = pre- and postgonite; c = ejaculatory sclerite; d = ST6; e = hypandrium). 222. M. chantryi sp. nov. 223. M. currani Guimar„es. 224. M. cyaneicincta (Surcouf). 225. M. flavicrura Aldrich. 226. M. longicercus sp. nov. 227. M. peregrina Aldrich. 228. M. pictipennis Aldrich.

FIGURES 266–279. Male sternites of Mesembrinella spp. 266. M. currani Guimar„es. 267. M. cyaneicincta (Surcouf). 268. M. flavicrura Aldrich. 269. M. longicercus sp. nov. 270. M. peregrina Aldrich. 271. M. pictipennis Aldrich (ST5 only). 272. M. quadrilineata (Fabricius). 273. M. randa (Walker). 274. M. semihyalina Mello. 275. M. serrata sp. nov. 276. M. socors (Walker). 277. M. townsendi Guimar„es. 278. M. umbrosa Aldrich. 279. M. velasquezae 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 439–453. Female sternites of Mesembrinella spp. 439. M. currani Guimar„es. 440. M. cyaneicincta (Surcouf). 441. M. flavicrura Aldrich. 442. M. longicercus sp. nov. 443. M. peregrina Aldrich. 444. M. pictipennis Aldrich. 445. M. quadrilineata (Fabricius). 446. M. randa (Walker). 447. M. semihyalina Mello. 448. M. serrata sp. nov. 449. M. socors (Walker). 450. M. townsendi Guimar„es. 451. M. umbrosa Aldrich. 452. M. velasquezae sp. nov. 453. M. anomala (Guimar„es).