Oropezella bicolor, Ale-Rocha, Rosaly & Freitas-Silva, Rafael Augusto Pinheiro De, 2014

Ale-Rocha, Rosaly & Freitas-Silva, Rafael Augusto Pinheiro De, 2014, New species of Oropezella Collin (Diptera, Hybotidae, Ocydromiinae) from Brazil and Costa Rica, with comments on the relationships among species-groups, Zootaxa 3852 (5), pp. 501-539 : 509-510

Oropezella bicolor sp. nov.

( Figs 16 –23, 112)

Diagnosis. Frons very short and narrowly dichoptic; thorax and abdomen shiny; scutum dark brown to black with narrow acrostical yellow stripe; mesopleuron pale brown; abdomen with tergites 2–4 yellow, the remaining dark brown; coxae, trochanters and tarsi brown; femora, fore and mid tibiae pale brown, hind tibia yellow; wing brown, R2+3 short, cu p lacking.

Etymology. From the Latin “ color ” (color) and “ bi ” (two), in reference to the coloration of the abdomen in which the first segment is yellow and the remaining segments brown.

Description. Holotype male. Body: 2.1 mm. Wing: 1.7 mm. Head: antenna brown inserted above middle of head; scape as long as pedicel; postpedicel ovate, short, 2.5 times longer than wide, as long as scape and pedicel combined; stylus bare, apical, 2.5 times length of antenna. Ocellar triangle not protuberant, with 1 pair of elongate ocellar setae, strongly proclinate, almost horizontal, posterior pair absent. Narrowly dichoptic; frons very short, less than half length of face. Proboscis pale brown to yellow; palpus brown bearing 1 apical and 1 median long bristle. Postcranium shiny on margins, with gray pruinescence on center, around foramen; postcranium inflated and wide on vertex; postocular setae short and scattered. Thorax: scutum shiny with some scattered pruinescence on prescutellar area, scutellum with conspicuous pruinescence, mesopleuron subshining with scattered brown pruinescence; scutum dark brown to black with shiny metallic blue in ground color and narrow yellow acrostichal stripe broadened distally, postpronotal lobe yellow, scutellum brown, mesopleuron brown. Bristles thin and elongated; acr and dc uniserial. Differentiated bristles: 1 long npl; posterior dc pair discreetly developed, little longer than anterior dc; 1 pal short; scutellum with 2 long and robust pairs, lateral pair about two-thirds length of apical pair. Wing (Fig. 112): brown; R1 short, meeting C before middle of wing; R2+3 unusually short; cell dm emitting 2 veins; M1+2 and CuA1 evanescent apically; M1+2 slightly convex; cell cu p lacking. Legs: coxae, trochanters and tarsi brown; fore and mid femora and tibiae pale brown; hind femur yellow. Differentiated bristles: mid tibia with 1D above middle, 1AV at middle and 1AV apical; mid tarsomere 1 with 1V sub-basal; hind tibia with 1D at middle; hind femur with 1A near apex. Tibiae with some elongate and thin bristles on ventral surface. Abdomen: shiny; tergite 1 pale brown, tergites 2–4 yellow, remaining dark brown; sternites 1–3 yellow, sternite 4 pale brown, apical sternites brown. Bristles brown, short, thin and scattered. Terminalia: hypandrium as long as wide with slightly concave apex ( Fig. 16 ); epandrium short, not deeply cleft dorsally, epandrial lamellae broadly fused basally ( Fig. 17 ); left epandrial lamella slightly shorter than right, with slender dorsoapical process ( Figs 17, 19 ); right surstylus about as long as left, somewhat wider in basal half ( Fig. 20 ); left surstylus simple, slightly concave on inner surface ( Fig. 19 ); articulated distal portion of phallus simple, elongate, subequal in length to basal portion, with basal process long ( Fig. 18 ). Female. Similar to male except tergites more gradually darkened towards apex from pale brown to brown; sternites pale brown except sternite 8 brown. Ovipositor (Figs 21–23): eighth segment very short, wider than long; tergite 8 deeply cleft medially on distal margin; tergite and sternite 8 fused to form a ring; sternite 8 with dorsolateral membranous invaginations.

Type material. HOLOTYPE ♂, labelled: BRASIL, AM, Manaus / Res[serva] km 41, PDBFF / 07–08.vii.2004 / Trilha J I—SB, R. Querino ( INPA) (in good condition except by some postcranial and thoracic bristles lost; not dissected). Paratypes: BRASIL, Amazonas: 1♂, 60 km N. Manaus, Fazenda Esteio, ZF 3, km 23, 28.xi.1985, Arm. Malaise, Res. 1210, R.C.E.; 1♂, Manaus, AM 0 10, km 54, BL 2, 02º45'39"S 59º51'03"W, 01–11.x.1997; 1♀, Manaus, Reserva Ducke, Ig[arapé] Uberê, Arm. Malaise, 16.vi.–21.vii.2003, J.M.F. Ribeiro, J. Vidal. Jailson Vidal; 1♀, Manaus, Res[erva] km 41, PDBFF, 12–13.v.2004 (all housed at INPA).

Distribution. Brazil (Amazonas).

Figures

FIGURES 16 – 20. Oropezella bicolor. Hypopygium: 16, ventral aspect; 17, dorsal aspect; 18, phallus, lateral aspect (hypandrium spotted); 19, 20, left and right epandrial lamella, surstylus and cercus, respectively, lateral aspect. Female terminalia: 21, dorsal aspect; 22, ventral aspect; 23, lateral aspect. Scale bar: hypopygium = 0.1 mm; female terminalia = 0.3 mm.