Pityocera (Pseudelaphella) barrosi Gorayeb & Krolow

Krolow, Tiago Kütter, Henriques, Augusto Loureiro, Gorayeb, Inocêncio De Sousa, Limeira-De-Oliveira, Francisco & Buestán, Jaime, 2015, Taxonomic revision of the Neotropical genus Pityocera Giglio-Tos, 1896 (Diptera: Tabanidae: Scionini), Zootaxa 3904 (3), pp. 301-333 : 317-319

Pityocera (Pseudelaphella) barrosi Gorayeb & Krolow sp. nov.

(figures 9A–G, 10A–E)

Type locality. Brazil, Mato Grosso do Sul, Miranda.

Diagnosis. Medium-sized (11.0– 12.5 mm); frons with parallel sides; face, gena and parafacial pruinose; only clypeus smooth and shiny; beard yellowish-brown; antennal flagellum yellow, except for the last flagellomere with black apex; legs yellow with trochanters concolorous, posterior tibiae with few sparse black hairs in dorsal view.

Description, Holotype ♀: body length 12.0 mm (fig. 9A); wing length 11.3 mm; wing width 3.7 mm.

Head (fig. 9B): eyes without color pattern when dry, densely pilose. Occiput with orangish yellow hairs. Frons parallel, D.I. 1.0, F.I. 2.8; with yellowish brown pruinosity and black pilosity. Subcallus glabrous, with pruinosity identical to frons. Parafacial and face with pruinosity identical to frons, with sparse black and yellow hairs. Gena with pruinosity and beard yellowish brown. Clypeus smooth and shiny. Antenna (fig. 9C) scape and pedicel with yellowish-brown pruinosity and brown hairs; flagellum yellow without pruinosity; first flagellomere longer than wide, with tuft of dorsal hairs; flagellomeres 1–3 fused, 4–7 free; apical flagellomere with black apex and black hairs. Palpus with first segment tubular, shorter than the second, with long yellowish brown hairs and some short black hairs; second segment with enlargement occupying more than half of the length, hair only on external margins, central area yellow and bare, distal half narrow and completely pilose; proboscis slender and very long, over twice the length of the head.

Thorax: scutum brown, with black and yellowish brown hairs, longitudinal bands indistinct; post-pronotal lobe, notopleura, post-alar callus and scutellum apex with pruinosity slightly brighter. Notopleura with a tuft of black hair (dorso-lateral view). Pleura with bright integument, covered with light brown pruinosity and predominantly yellowish brown hair, except for some sparse black hair. Legs slender; coxae and trochanters with pruinosity and pilosity similar to pleura; tibiae, femora and tarsi yellow with light yellow pilosity, except for some sparse black hairs; hind tibiae with sparse black hair in dorsal view. Wing fumose; r5 cell closed with petiole very long; appendix of R4 vein present, long; venation yellowish brown.

Abdomen: yellowish brown (dorsal view); tergites 1–4 with black hairs, tergites 5–7 with predominantly white hair; sternites yellow covered with white pruinosity and white hairs.

Terminalia (Paratype). Tergites IX and X, cercus and hypoproct as in figure (fig. 9D). Tergite IX fused, narrow in center. Tergite X divided into two pieces with internal lateral margins widened, creating a membranous space between the contact area of the internal lateral margins and tergite IX. Cercus with margins rounded and apex subtriangular. Hypoproct rounded, reaching one third of the cercus length. Hypogynium + hypogynial valve (fig. 9E). Hypogynium subtriangular with lateral margins straight from middle to apex and slightly rounded from middle to base; apex with a v-shaped slit reaching the hypogynial valve. Genital fork (fig. 9F) with slender arms, bearing poorly sclerotized distal expansions; anterior margin straight with slight median indentation; lateral extremities slightly acuminate; spermathecal ducts long and little sclerotized; spermatheca (fig. 9G) heavily pigmented, elongated and with apex narrowed.

Paratypes variation. body length 11.0– 12.5 mm; wing length 10.5–11.2 mm; wing width 3.4–3.7 mm; F.I. 2.6–2.8; D.I. 1.0.

Male (fig. 10A–B): similar to the female in patterns of pruinosity and pilosity. Differs in the following characters: head holoptic; upper ommatidia larger than lower ones; first flagellomere more elongated; palpus porrect with subequal segments; second segment of the palpus without distal narrowing, with broader glabrous central area.

Terminalia (paratype) (figs. 10C–E). Epandrium, cercus and hypoproct as in figure 10E. Epandrium fused with lateral margins rounded; slightly excavated on apex (dorsal view). Cercus with apex subrectangular. Hypoproct elongated, exceeding the cercus apex. Hypandrium + gonocoxite, gonostylus and aedeagus as in figures 10C–D. Hypandrium + gonocoxite robust with anterior margin rounded; gonocoxite hollow (dorsal view) developed, reaching half of its length. Gonostylus elongated, digitiform with apex pointed. Aedeagus slender without anterior enlargement, more robust than gonocoxal apodemes; length subequal to gonocoxal apodemes.

Distribution. Brazil (Mato Grosso do Sul).

Type material. Holotype ♀. “[ BRAZIL] Faz. Guaicurus\ Miranda – MS\ Nzi Po 18/3/[20]02\ Col. W. V. Koller ( MPEG), part of the fore left leg is lost, with only coxa remaining. Paratypes 4 ♀ 2 ♂. “Faz. Guaicurus\ Miranda – MS\ Nzi Po 19/3/[20]02\ Col. W. V. Koller (♀ INPA); “Faz. Guaicurus\ Miranda – MS\ Nzi P 16/03/ [20]03\ W. Koller (♀ MPEG); “Faz. Guaicurus\ Miranda – MS\ Nzi P 17/03/[20]03\ W. Koller (♂♀ MPEG); “Faz. Guaicurus\ Miranda – MS\ Nzi P 14/04/[20]03\ W. Koller (♀ MPEG); “Faz. Guaicurus\ Miranda – MS\ Nzi P 15/ 04/[20]03\ W. Koller (♂ INPA).

Additional material examined. BRAZIL, Mato Grosso do Sul, Miranda, Faz.[enda] Guaicurus 17/iii/2002, W. V. Koller (♀ MPEG); idem, 18.iii.2002, W. V. Koller (♀ MPEG).

Etymology. the specific epithet honors the dipterist Dr. Antonio Thadeu Medeiros de Barros, currently in the Pantanal region.

Discussion. this species has yellowish brown beard and is easily differentiated from P. nana , P. patellicornis , P. gorayebi sp. nov. and P. pernaquila sp. nov., which have a white beard. P. rhinolissa sp. nov. and P. ecuadorensis sp. nov. have a predominantly shiny face, while in P. barrosi sp. nov. the face is pruinose.