Mesembrinella randa ( Walker, 1849 )

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 : 129-131

publication ID	https://doi.org/ 10.11646/zootaxa.4659.1.1
publication LSID	lsid:zoobank.org:pub:57309E14-0330-4ED7-BCDA-355EE6618215
DOI	https://doi.org/10.5281/zenodo.5587040
persistent identifier	https://treatment.plazi.org/id/03DA87E6-0FBA-FF57-FF19-BD8634FEFE38
treatment provided by	Plazi
scientific name	Mesembrinella randa ( Walker, 1849 )
status

Treatment

Mesembrinella randa ( Walker, 1849)

( Figs 85–86 View FIGURES 81–86 , 175–176 View FIGURES 173–182 , 230 View FIGURES 229–235 , 273 View FIGURES 266–279 , 317 View FIGURES 312–317 , 361 View FIGURES 350–369 , 402 View FIGURES 401–410 , 446 View FIGURES 439–453 , 479 View FIGURES 479–483 , 488 View FIGURE 488 )

Dexia randa Walker, 1849: 852 . Lectotype female (NHMUK), here designated. Type locality: Brazil.

Eumesembrinella randa: Peris & Mariluis (1984: 263) ; Toma & Carvalho (1995: 142); Kosmann et al. (2013: 77); Wolff & Kosmann (2016: 866) View Cited Treatment ; Marinho et al. (2017: tab. 1); Velásquez et al. (2017: 108).

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

Diagnosis. A large fly averaging 12 mm (11–13/5) in length. Postpronotal setae 2x 2; base of wing mostly hyaline; anterior margin of wing infuscated from costa to vein R 2+3; T3–4 concolorous, without distinct posterior bands; posterior edge of T4 lacking marginal setae dorsally; posthumeral seta present, often reduced; rim of upper calypter dark.

Redescription. Male. Head. Frons broad, 0.078 (0.07–0.09/5) of head width at narrowest, slightly narrower than width of parafacial at level of lunule; fronto-orbital, parafacial, gena and antenna pale golden, frontal vitta darker orange; frontal setae ascending about 60% of distance to vertex; frontal vitta obliterated midway, gena with typical horizontal row of stout setae midway, otherwise with scattered weak tan setae; posterior margin with few golden setae; postgena orange with pale tomentum and golden setae; occiput dark orange with silvery tomentum and golden setae; median occipital sclerite shiny dark brown; antenna pale gold except brown setae on arista; palpus typical; ocellar triangle medium-sized, anterior ocellus about 2x size of posterior ocelli; supravibrissal setae short and brown, in short row, ascending about 1/10 of distance to antennal base.

Thorax. Dorsum dark orange midway, with 4 broad golden tomentose stripes, lateral presutural areas pale orange; pleural area orange; chaetotaxy: ac 0:1, dc 2:3, ia 0, ph 1, often somewhat reduced, ppn 2x 2, kat 1:1, meral setae typical, 1 pair of ac parallel or slightly converging, sa and lat absent, bas typical, 1 weak pb, 1 disc; subscutellum moderately developed; spiracles orange, medium-sized; legs: femora orange, tibiae and tarsi tan to brown. Wing with anterior edge infuscated from costa to R 2+3; subcostal sclerite orange and bare; basicosta and tegula orange; section IV 0.30 of section III; discs of upper and lower calypters reddish; rim of upper calypter dark with long pale setae, rim of lower calypter pale with long reddish setae.

Abdomen. Dorsum of T1+2–3 orange, T4–5 shiny blue; T3–4 with dorsolateral pair of marginal setae; rear margin of T4 without marginal setae; disc of T5 with dense, short, fine setae only. Terminalia in lateral view: surstylus with moderate backward curve [sharper than in M. quadrilineata ], cercus with apical hook ( Fig. 85 View FIGURES 81–86 ); in posterior view, cerci broad at base, then tapering gradually to tip ( Fig. 86 View FIGURES 81–86 ); phallus in lateral view with epiphallus of moderate length and with slight backward curve ( Fig. 175 View FIGURES 173–182 ); in dorsal view, hypophallus rounded with fine serrations, as in Fig. 176 View FIGURES 173–182 ; T 6 View FIGURES 1–8 , STS7+8, pre- and postgonite, ejaculatory sclerite, ST6 and hypandrium as in Fig. 230 View FIGURES 229–235 ; ST1–5 very narrow, as in Fig. 273 View FIGURES 266–279 .

Female. Similar to male except frons 0.278 (0.25–0.30/5) of head width at narrowest. T6 of FU shape; T7 continuous, darkened midway, pale laterally; T8 as separate sclerites; epiproct divided midway ( Fig. 317 View FIGURES 312–317 ); ST6–8 and hypoproct as in Fig. 361 View FIGURES 350–369 ; spermathecae filiform ( Fig. 402 View FIGURES 401–410 ); ST1–5 as in Fig. 446 View FIGURES 439–453 .

Type material examined. LECTOTYPE ♀ ( Brazil; NHMUK; Fig. 479 View FIGURES 479–483 ), here designated, labeled: Brazil. / Pres. by the / Entomological / Club / 44.12; LECTOTYPE ♀ / Dexia / randa / Walker, 1849 / Designated by / Dear and Pont. [red border]; SYNTYPE ♀ / Dexia / randa Walker / 1849, List Dipt. / Brit. Mus., 4: 852 [red border]; LECTO-/ TYPE [round label with purple border]; Dexia / Type / randa / Walk. [round label with green border]; Ent. Club. / 44-12.

Remarks. Dexia randa was described based on at least two specimens from Brazil ( Walker 1849: 853), but only one of these type specimens is currently housed in NHMUK (N. Wyatt, pers. comm.). Dear and Pont selected and labeled this specimen as a lectotype for this species, without publishing the designation. The same specimen is here formally designated as the lectotype of this nominal species. The lectotype has a frons to head width of 0.30 at narrowest, 1 small ph and no presutural ia. It is significantly damaged, with 5 legs missing (only left mid leg attached) and the left wing broken off, kept in a vial pinned below the specimen; the macula on the wing is faint and faded.

Additional material examined. Bolivia, Tumupasa. 1 ♀, Mulford Biol. Expl 1921–1922. Xii, W.M. Mann ( LACM) . Brazil, Rondônia. 1 ♂*, 4 ♀♀ ♦ ( TLW281 – TLW284 ) , 19 ♀♀, 62 km SW Ariquemes, nr Fzda. Rancho Grande , 4–16.xi.1997, Fish Carrion Pitfall, J.E. Eger ( FSCA) ; 1 ♀, same data except 6–15.xii.1990, D.A. Rider & J.E. Eger ( FSCA) ; 1 ♀, same data except 17–24.iii. 1989, 180 m, W.J. Hanson ( LACM) . Colombia, Caqueta. 1 ♂*, 1 ♂, Rio Orteguaza, nr. Rio Peneya , 14–18.i.1969, Duckworth & Dietz ( LACM) . Peru, Cusco. 1 ♂, 1 ♀, Pilocapata, Villa Carmen , 12°53ʹS 71°24ʹW, v.2014, Multilure trap, M. Choque ( FSCA) GoogleMaps . Lorenzo. 1 ♂*, 2 ♂♂, Boqueron , 30.vi.1965, J. Schunke ( LACM) ; 1 ♀, same data except 9.vii.1965 ( LACM) ; 1 ♀, same data except 4.vii.1965 ( LACM) ; 1 ♀, same data except 500 m, 14.vii.1965 ( LACM) ; 1 ♀, same data except 22.iii.1964 ( LACM) ; 2 ♀♀, 160 km NE Iquitos, Explornapo Camp, 2 km from Rio Napo on Rio Sucusari , 27–31.viii.1992, human dung trap, J. Castner & Skelley ( FSCA) . Pasco. 2 ♂♂, 1 ♀ *, 3 km N. Puerto Bermudes, 200 m, jungle, 27.vi.1980, fish bait, D. Baumgartner, B. Greenberg (BG) ; 1 ♀, no other data ( CEUA) .

Distribution. Bolivia, Brazil, Colombia, Peru. Guimar„es (1977) listed it from Guyana, Marinho et al. (2017) also listed it from French Guiana and Venezuela.

Remarks. Four specimens ( TLW 281–284) were barcoded and formed a distinct group close to M. benoisti ( Fig. 488 View FIGURE 488 ).

FU	Fudan University, Department of Biology
NHMUK	Natural History Museum, London
LACM	Natural History Museum of Los Angeles County
FSCA	Florida State Collection of Arthropods, The Museum of Entomology

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Taxonomy

Kingdom	Animalia
Phylum	Arthropoda
Class	Insecta
Order	Diptera
Family	Calliphoridae
Genus	Mesembrinella