Mesembrinella pictipennis Aldrich, 1922

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 : 127-128

publication ID	https://doi.org/ 10.11646/zootaxa.4659.1.1
publication LSID	lsid:zoobank.org:pub:57309E14-0330-4ED7-BCDA-355EE6618215
persistent identifier	https://treatment.plazi.org/id/03DA87E6-0F44-FFAA-FF19-BF1A36BFFB58
treatment provided by	Plazi
scientific name	Mesembrinella pictipennis Aldrich, 1922
status

Treatment

( Figs 81–82 View FIGURES 81–86 , 171–172 View FIGURES 163–172 , 228 View FIGURES 222–228 , 271 View FIGURES 266–279 , 315 View FIGURES 312–317 , 359 View FIGURES 350–369 , 400 View FIGURES 370–400 , 444 View FIGURES 439–453 , 478 View FIGURES 474–478 , 494 View FIGURES 489–497 )

Mesembrinella pictipennis Aldrich, 1922: 11 . Lectotype male (NHMUK), here designated. Type locality: Yungas de La Paz , Bolivia.

Mesembrinella pictipennis: Peris & Mariluis (1984: 259) ; Wolff (2013: 121); Kosmann et al. (2013: 78); Marinho et al. (2017: tab. 1); Cerretti et al. (2017: tab. 2).

Diagnosis. A large fly, averaging 16.7 mm (16–17/3) in length. Wing pattern distinctive: anterior half infuscated, posterior half darkened around veins ( Fig. 494 View FIGURES 489–497 ); abdomen without tomentose pits; supravibrissal setae brown or black, ascending about 1/2 of distance to antennal base; subcostal sclerite with long, stout brown setae; scutellum with discal setae; palpus yellow; section IV of wing 0.51 of section III.

Redescription. Male. Head. Frons narrow, 0.015 of head width at narrowest [only lectotype was measured], eyes almost touching; fronto-orbital reddish with pale tomentum; frontal setae ascending about 60% of distance to vertex; frontal vitta orange, obliterated in upper 2/3; parafacial yellow in upper 1/3, orange with whitish tomentum in lower 2/3; gena orange with silvery tomentum and horizontal row of stout setae midway; postgena orange with pale tomentum and long golden setae; occiput with dense silvery tomentum on orange cuticle, with golden setae; median occipital sclerite shiny dark brown; antenna: pedicel orange, first flagellomere brown, arista orange with tan setae; eye with median facets about 3x size of lateral facets; ocellar triangle small, supravibrissal setae dark brown, ascending about 1/2 of distance to antennal base.

Thorax. Dorsum reddish-brown with four pale tomentose stripes, pleura yellow-orange; chaetotaxy: ac 1:1, dc 2:3, ia 1, ph 1, ppn 3x 3, kat 2:1, meral setae long and fine, 1 pair converging ap, 1 weak sa, 1 weak lat, 1 stout bas, 1 weak pb, 1 disc; subscutellum moderately developed; spiracles yellow, medium-sized; legs dark orange. Wing with strong, dark infuscation on anterior half, only areas around veins infuscated on posterior half ( Fig. 494 View FIGURES 489–497 ); subcostal sclerite with long reddish setae, basicosta dark reddish, tegula lighter red; section IV 0.51 of section III; discs of upper and lower calypters reddish-brown; rim of upper calypter dark brown with reddish setae, rim of lower calypter mostly pale with long reddish setae.

Abdomen. T1+2 and T3 more or less tan, T4–5 shiny blue; rear margin of T4 with row of stout setae; disc of T5 with dense, short, sparse, fine setae only. Terminalia in lateral view with surstylus curved sharply backward ( Fig. 81 View FIGURES 81–86 ); in posterior view, cerci with broad base, gradually tapering to blunt tip ( Fig. 82 View FIGURES 81–86 ); phallus in lateral view with long, slender epiphallus with slight backward curve ( Fig. 171 View FIGURES 163–172 ); in dorsal view, hypophallic lobes narrow ( Fig. 172 View FIGURES 163–172 ); T6, STS7+8, pre- and postgonite as in Fig. 228 View FIGURES 222–228 ; ST5 as in Fig. 271 View FIGURES 266–279 [lectotype missing ST2–4].

Female. Similar to male except frons 0.26/2 of head width at narrowest. T6 wide and deep, of OU shape; T 7 in broad arc nearly separated midway; T8 as pair of small slender sclerites; epiproct divided ( Fig. 315 View FIGURES 312–317 ); ST6–8 and hypoproct as in Fig. 359 View FIGURES 350–369 ; spermathecae filiform ( Fig. 400 View FIGURES 370–400 ); ST1–5 as in Fig. 444 View FIGURES 439–453 .

Type material examined 1. LECTOTYPE ♂ ( Bolivia, La Paz; NHMUK; Fig. 478 View FIGURES 474–478 ), here designated, labeled: Yungas de la Paz, / Bolivia / 1000 m / Purchd. from / H. Rolle / 1904–117; LECTOTYPE ♂ / Mesembrinella / pictipennis / Aldrich, 1922 / Designated by / Dear and Pont. [red border]; Mesembrinella / pictipennis / Type Ald.; LECTO- / TYPE [round label with purple border].

PARALECTOTYPE: ♀, same locality as lectotype ( NHMUK) [with handwritten label “ Mesembrinella pic- tipennis Allotype Ald. ”, paralectotype label (des. Dear & Pont) and round paralectotype label with light blue bor- der] .

Remarks. Dear and Pont selected a lectotype for Mesembrinella pictipennis Aldrich, 1922 , without publishing the designation. The same specimen (in NHMUK) is here formally designated as the lectotype of this nominal species. The paralectotype is conspecific with the lectotype (N. Wyatt, pers. comm.).

Additional material examined. Bolivia, La Paz. 1 ♀, Coroico, 1200 m, [no date], Fassi ( NHMUK) ; 1 ♀, Rio Songo , 750 m, [no date], Fassi ( NHMUK) . Ecuador, Napo. 2 ♀♀, Tiputini Biodiversity Stn. , 0°36ʹ50ʺS 76°9ʹ1ʹW, V.2011, S.A. Marshall ( UGG) GoogleMaps . La Paz. 2 ♂♂, Heath River Wildlife Centre, 21 km SSW Puerto Heath, 12°40ʹS 68°42ʹW, 29.iv–12v.2007, S.A. Marshall ( UGG) GoogleMaps .

Distribution. Bolivia, Ecuador. Marinho et al. (2017) also listed it from Colombia and Costa Rica.

Remarks. No specimens were barcoded.