Mesembrinella semihyalina Mello, 1967: 73 Mello, 1967: 73 Toma & Carvalho (1995: 138) Kosmann et al. (2013: 78) A revision of the genera and species of the Neotropical family Mesembrinellidae (Diptera: Oestroidea) Whitworth, Terry L. Yusseff-Vanegas, Sohath Zootaxa 2019 2019-08-26 4659 1 1 146 Mello, 1967 Mello. 1967 [151,639,477,504] Insecta Calliphoridae Mesembrinella Animalia Diptera 130 131 Arthropoda species semihyalina  ( Figs 87–88, 177–178, 231, 274, 318, 362, 403, 447, 488)     Mesembrinella semihyalina   Mello, 1967: 73. Holotypemale (FIOC), not examined. Type locality: Parque Sooretama, Espirito Santo, Brazil.    Mesembrinella semihyalina:  Toma & Carvalho (1995: 138);  Kosmann et al.(2013: 78); Wolff (2013: 121); Marinho et al.(2017: tab. 1); Cerretti et al.(2017: tab. 2).   Diagnosis.A medium-sized fly averaging 12.2 mm(11–13/5) in length. Wing infuscated; supravibrissal setae brown; subcostal sclerite setose; wing with section IV 0.23 of section III; male phallus in dorsal view with weak serrations ( Fig. 178); legs entirely orange. Male frons about 0.06 of head width at narrowest; epandrium, cerci and surstyli as in Figs. 87–88. Female T6 of WUshape ( Fig. 318).  Redescription. Male.Head. Frons 0.063 (0.06–0.07/3) of head width at narrowest. Fronto-orbital and parafacial pale silvery when viewed from above, pale orange when viewed from below; frontal setae ascending halfway to vertex; frontal vitta dark orange, obliterated midway; gena pale orange with horizontal row of few dark setae anteriorly, otherwise with small dark setae; postgena pale yellow with fine yellow setae; occiput with pale yellow tomentum and yellow setae; median occipital sclerite shiny black; antenna orange, first flagellomere with pale tomentum, arista dark orange; palpus typical; eye with median facets 3xsize of lateral facets; ocellar triangle medium-sized, anterior ocellus 2xsize of posterior ocelli; short row of tan supravibrissal setae on facial ridge ascending, about 1/6 of distance to antennal base. Thorax. Dorsum with alternating dark brown areas with yellowish tomentose stripes; pleura dark orange with whitish tomentum; spiracles small, pale orange; chaetotaxy: ac variable, 2:1or 2:2, sometimes one or more setae missing, dc 2:3, ia 1, ph 1, ppn 3x3, kat 1:1, meral setae typical, 1 pair of parallel ap, sa and lat absent, 1 bas, 1 weak pb, 1 disc; subscutellum moderately developed; spiracles medium-sized, pale yellow; legs entirely orange. Wing faintly infuscated along distal 2/3 of costa through R 2+3and along veins; basicosta and tegula pale orange; section IV 0.23 of section III; upper calypter with pale disc and dark rim with reddish setae; lower calypter with pale disc and rim, rim with long pale setae. Abdomen. T1+2 dark orange; T3–T5 shiny blue with patchy white tomentum; rear margins of T4–5 with stout setae; disc of T5 with dense, medium-long, fine setae only. Terminaliain lateral view with surstylus broad, with gradual backward curve, cercus with apical hook ( Fig. 87); in posterior view, base of cerci broad, relatively short and stout, narrowing apically to chisel-like tip ( Fig. 88); phallus in lateral view with epiphallus short and stout with slight backward curve ( Fig. 177); in dorsal view, hypophallic lobes slightly rounded with shallow, moderate serrations ( Fig. 178). T6, STS7+8, pre- and postgonite, ejaculatory sclerite and ST6 as in Fig. 231; ST2–5 as in Fig. 274.  Female.Similar to male except frons 0.248 (0.23–0.26/5) of head width at narrowest. T6 of WUshape; T7 continuous; T8 narrowed midway; epiproct divided midway ( Fig. 318); ST6–8 and hypoproct as in Fig. 362; spermathecae filiform ( Fig. 403); ST1–5 as in Fig. 447.  Type material examined.  PARATYPE: Brazil, Distrito Federal.1 ♂, Parque Sooretama (Cupido), E. Santo, L. Travis, H. Travis, II/III-948 ( CNC).  Additional material examined.  Brazil,  Alagoas. 1 ♀ ♦( TLW392),  Murici,  26–30.vii.2012, S.S. Nihei, P.G. Dias, D.M. Alcantara, C.S. Costa( NHMUK); 1 ♂♦, same data except ( TLW392) ( NHMUK).   São Paulo.1 ♂*,  11.ii.1923, L.G. Saunders( NHMUK).   Rio de Janeiro.1 ♂*, Angrados Reis, E. de Rio( CNC);  1 ♀, Angra do Reis,  29.v.1972, H.S. Lopes( CNC).   Rondônia. 1 ♀*, 3 ♀♀, Caucalândia, 10°32ʹS 62°48ʹW,  21.x.1991, 1 ♀♦ ( TLW432), J.  McDonald( MEM);  1 ♀*, 62 km, SW Ariquemesnr Fzda. Rancho Grande,  6–15.xii.1990, D.A. Rider, J.E. Eger( FSCA).  Distribution. Brazil.  Remarks. Bonatto (2001)argued that this species is a synonym of  M. abaca[here considered a synonym of  M. socors], but  M. semihyalinahas a distinct, dark infuscation in cells r 1and r 2+3, while  M. socorshas, at most, a faint yellowing in the r 1cell along the costa. The known range of  M. semihyalinais Brazil, whereas  M. socorsis known only from Central America. Two specimens of  M. semihyalina( TLW392 and TLW432) were barcoded; they clustered together, close to  M. anomalaand distant from  M. socors(genetic distance 12%) ( Fig. 488), supporting the morphological differentiation between these two species. 2351005847 [439,605,580,605] FIOC Brazil Parque Sooretama 130 131 1 Espirito Santo holotype 2351005867 CNC E. Santo & L. Travis & H. Travis Brazil Brazil 130 131 1 paratype 2351005819 [561,927,1859,1886] TLW Brazil Alagoas 130 131 TLW392 1 1 Alagoas 2351005813 2012-07-26 2012-07-30 2012-07-26 NHMUK S. S. Nihei & P. G. Dias & D. M. Alcantara & Costa Brazil Murici 130 131 1 2351005837 [596,1110,1895,1922] 2012-07-26 2012-07-30 2012-07-26 NHMUK S. S. Nihei & P. G. Dias & D. M. Alcantara & Costa Brazil Murici 130 131 TLW392 1 2351005801 1923-02-11 NHMUK L. G. Saunders Brazil Sao Paulo 130 131 1 Sao Paulo 2351005854 [453,1081,1931,1958] CNC Angra & Reis & E. de Rio Brazil Rio de Janeiro 130 131 1 Rio de Janeiro 2351005791 1972-05-29 CNC H. S. Lopes Brazil Angra do Reis 130 131 1 1 2351005877 [366,1285,1967,1994] 1991-10-21 TLW Caucalandia Brazil -10.533334 Rondonia 1297 -62.8 130 131 TLW432 5 5 Rondonia 2351005783 MEM Heard Island and McDonald Islands McDonald 130 131 1 2351005888 [250,1350,2003,2030] 1990-12-06 1990-12-15 1990-12-06 FSCA SW Ariquemes & D. A. Rider & J. E. Eger McDonald Fzda. Rancho Grande 130 131 1 1