Mesembrinella quadrilineata ( Fabricius, 1805 )

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 : 128-129

Mesembrinella quadrilineata ( Fabricius, 1805)

( Figs 83–84, 173–174, 229, 272, 316, 360, 401, 445, 488)

Musca quadrilineata Fabricius, 1805: 286 . Holotype female (NMW), not examined. Type locality: America Meridionals [=

South America]. Mesembrina quadrilineata: Townsend (1892: 34) . Eumesembrinella quadrilineata: Peris & Mariluis (1984: 263) ; Toma & Carvalho (1995: 127); Marinho et al. (2012: 142); Kos-

mann et al. (2013: 77); Wolff & Kosmann (2016: 866); Marinho et al. (2017: tab. 1); Velásquez et al. (2017: 108). Mesembrinella quadrilineata: Cerretti et al. (2017 : tab. 2).

Diagnosis. A large fly averaging 12.6 mm (12–13/5) in length. Postpronotal setae 2x 2; wing with base yellowish and anterior margin infuscated from costa to vein R 2+3; T3–4 concolorous, without distinct posterior bands; posterior row of stout marginal setae on T4; posthumeral seta absent.

Redescription. Male. Head. Frons broad, 0.108 (0.10–0.12) of head width at narrowest, about equal to width of parafacial at level of lunule. Fronto-orbital broad, pale orange when viewed from below and yellowish when viewed from above with faint yellowish tomentum, sclerites almost touching midway; frontal setae ascending about 60% of distance to vertex; frontal vitta dark orange, broad below, narrowed, almost obliterated midway but broader above, ascending to base of ocellar triangle; parafacial pale orange; gena orange with silvery tomentum, horizontal row of stout, dark setae midway, and scattered dark setae except for a few pale setae near posterior margin; postgena orange

1 Paralectotype not examined directly; information provided by N. Wyatt ( NHMUK) .

with silvery tomentum and fine golden setae; occiput dark with silvery tomentum and fine golden setae, median occipital sclerite shiny dark brown; antenna: pedicel, first flagellomere and base of arista orange, setae on arista brown; palpus typical; eye with median facets 2x size of lateral facets; ocellar triangle moderate, anterior ocellus slightly larger than posterior ocelli; supravibrissal setae short and dark, ascending about 1/6 of distance to antennal base.

Thorax. Dorsum dark brown to black with 4 pale tomentose stripes; pleura orange; chaetotaxy: ac 0:1, dc most 2:3, some 3:3, ia 0, ph 0, ppn 2x 2, kat 1:1, meral setae typical, 1 pair parallel or slightly diverging ap, sa and lat absent, 1 stout bas, 1 weak pb, 1 disc; subscutellum moderately developed; spiracles medium-sized, pale orange; legs orange except mid and hind tibiae and tarsi brown. Wing yellowish with anterior edge infuscated from costa to about midway between veins R 2+3 and R 4+5; subcostal sclerite orange and bare; basicosta and tegula orange; section IV 0.21 of section III; discs of upper and lower calypters pale orange; rims of upper and lower calypters pale, both with long orange setae.

Abdomen. T1+2 orange, T3 sometimes with anterior edge orange, remaining portions of T3–5 shiny metallic blue, usually only T1+2–3 with whitish tomentum; T1+2–3 with dorsolateral marginal setae, posterior margin of T4 with row of stout setae; disc of T5 with fairly dense, medium-long setae only. Terminalia in lateral view with surstylus weakly curved backward ( Fig. 83); in posterior view, cerci with broad base tapered distally to rounded tips ( Fig. 84); phallus in lateral view with epiphallus of moderate length and curvature ( Fig. 173); in dorsal view, hypophallic lobes expanded posteriorly ( Fig. 174). T6, STS7+8, pre- and postgonite, ST6 and hypandrium as in Fig. 229; ST1–5 very narrow, as in Fig. 272.

Female. Similar to male except frons 0.274 (0.24–0.29/5) of head width at narrowest. T6 of WU in shape; T7 with suture midway; T8 as two sclerites, epiphallus bilobed ( Fig. 316); ST6–8 and hypoproct as in Fig. 360; spermathecae filiform ( Fig. 401); ST2–5 as in Fig. 445.

Material examined. Bolivia, Santa Cruz. 1 ³ ( TLW280 ) , Potrerillos de Guenda , 17°40.9ʹS 63°27.6ʹW, 4– 7.iv.1998, B.D. Gill ( CNC) . Brazil, Amazonas. 1 ♀, Manaus , vii.1935, G.V. Vredenburg ( LACM) . Rondônia. 1 ³, 1♀ *, 1 ♀ ♦ ( TLW394 ) , 62 km SE Ariquemes , 15–22.iii.1991, W. Hanson, G. Bohart ( LACM) ; 2 ♀♀, same data except 8–20.xi.1994, W.J. Hanson ( LACM) ; 1 ³, 62 km SW Ariquemes, nr Fzda. Rancho Grande , 3–15.xii.1996, fish carrion pitfall, J.E. Eger ( FSCA) ; 2 ♀♀ ♦ ( TLW278 – TLW279 ) , same data except 4–16.xi.1997 ( FSCA) ; 1 ♀, same data except 17–24.iii.1989, S.W. Dunkle ( FSCA) ; 1 ♀, same data except 10°32ʹS 62°48ʹW, 29.ix–10.x. 1992, 165 m, D.W. Colby ( LACM) ; 1 ♀, 160–350 m vic. Caucalândia , 10°32ʹS 62°48ʹW, 10–11.x.1991, pitfall trap baited with human feces, J. MacDonald ( MEM) ; 1 ♀, same data except 12–13.X.1991 ( MEM) . Roraima. 1 ♀, Boa Vista, Fordlândia , R Tapajos, 15.vii, C.H.T. Townsend ( USNM) ; 1 ♀, same data except James’ Camp , vii.1918 . Ecuador,

Napo. 1 ³, 1 ♀, Jatun Sacha Biol. Res. , 6 km E Misahualli, 1°4ʹS 77°37ʹW, 450m, 3.v.2002, O. Lonsdale ( UGG) ; 1 ³, same data except 30.iv–8.v.2002, S.M. Paiero ( UGG) ; 1 ♀, same data except 6.v.2002, M. Buck ( UGG) . Orellano . 1 ♀, Yasuni Natl. Pk., Yasuni Research Stn. , 0°40ʹ50ʺS 76°24ʹ2ʺW, 250 m, 28.iv–8.v.2009, S.A. Marshall ( UGG) . Guyana, Cuyuni-Mazaruni. 1 ³, Kartabo , ix.1922, M.D. Haviland ( LACM) . Peru, Cusco. 1 ³, 1 ♀ *, 2 ♀♀, Pilocapata, Villa Carmen Biológica Sta. , 12°53ʹS 71°24ʹW, i–iii.2013, E. Rodriguez ( FSCA) ; 1 ♀, same data except v.2014, multilure trap, M. Choque ( FSCA) ; 1 ♀, Rio Tambopata , 60 km S Puerto Maldonado, Madre de Dios, 28.x.1999, D. & J. Lindsley ( LACM) . Junin. 1 ♀ ♦* ( TLW276 ) , La Merced, Fundo Genova , 9.vii.2008, [no collector] ( MJMO) . Pasco. 1 ³*, 3 km N Puerto Bermudes, 200 m, jungle, 27.vi.1980, D. Baumgartner, B. Greenberg (BG) . Venezuela, Bolivar. 1 ♀, Caura Val. , 1961. A.L. Melander Collection ( USNM) .

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

Remarks. Five specimens from Bolivia ( TLW 280), Brazil ( TLW 278–279) and Peru ( TLW 276–277) were barcoded, and three GenBank sequences from Brazil ( JQ 246687 , KR820730 , KR820731 ) were added to the analysis. They formed a distinct group with some genetic variation between sequences. The genetic distance between sequences within Brazil was less than 2%, whereas between Brazil and Bolivia, it was 2.3% and between Brazil and Peru it was around 3.5% ( Fig. 488). Morphologically, all these variants appear very similar, and further molecular and morphological studies are needed to determine if any cryptic species can be found within them.