Longivena bilobata, Vieira, Rodrigo & Rafael, Jose Albertino, 2014

Vieira, Rodrigo & Rafael, Jose Albertino, 2014, Longivena, a new robber-fly genus from Brazil (Diptera, Asilidae, Asilinae), ZooKeys 443, pp. 119-138 : 121

Taxon classification Animalia Diptera Asilidae

Longivena bilobata sp. n. Figs 1-9

Diagnosis.

Femora wholly black (Fig. 1); hind tibia, anteriorly, with basal 4/5 yellow and apical 1/5 black with a brown stripe, and posteriorly with basal 2/3 yellow and apical 1/3 brown; basal margin of epandrium straight, apex bilobate in lateral view (Figs 2, 4); gonocoxite apex rounded (Fig. 6).

Male.

Holotype. Head. Antenna black; two setae and two long ocellar macrosetae; vertex, frons and face black, all sparsely golden tomentose; mystax with black and yellow setae; palpus with yellow basal setae and black apical setae; proboscis black with yellow ventral setae; labial setae yellowish; occiput black, silvery tomentose with white setae; ten black postocular macrosetae.

Thorax (Fig. 1). Antepronotum and postpronotum black, gold to brown tomentose; mesonotum black dorsally, golden laterally, with gold tomentose presutural and prescutellar spot; pleuron gray tomentose, except anepisternum gray and golden tomentose; scutellum gold tomentose. Chaetotaxy: Two black notopleural macrosetae; two black supra-alar macrosetae; two black postalar macrosetae; four pairs black presutural dorsocentral macrosetae; no anatergal setae; two black apical scutellar setae; discal scutellar setae black; katatergal macrosetae black; setae on posterior meron + metanepisternum yellowish.

Wing (Fig. 3). Brown. Crossvein r-m passes slightly beyond middle of discal cell; halter yellow.

Legs (Fig. 1). Femora wholly black. Fore tibia black; mid tibia dark brown to black anteriorly and yellow posteriorly; hind tibia, anteriorly, with basal 4/5 yellow and apical 1/5 black with a brown stripe, and with basal 2/3 yellow and apical 1/3 brown posteriorly. Fore femur with yellow ventral setae; mid femur with five black anteroventral setae, with one black apical seta dorsoposteriorly; hind femur with two yellow and one black macrosetae anteriorly, three yellow on basal 1/2 and three black macrosetae on apical 1/2 anteroventrally, and one apical black macrosetae posterodorsally; fore tibia with two black setae posteriorly; mid tibia with one long, black anteroventral seta; hind tibia with three black anterodorsal and two anteroventral setae; tarsomeres with black setae.

Abdomen. Tergites II–V dark brown, gold tomentose apically and laterally; tergites VI–VII golde tomentose; sternites I–V brown tomentose and sternites VI–VII golden tomentose. Sternite VIII not developed medioapically.

Terminalia (Figs 2, 4-9). Dark Brown to black (Fig. 2); epandrium basal margin straight, apex bilobate in lateral view (Figs 2, 4); gonostylus apex subtruncated (Figs 6, 7); gonocoxite apex rounded (Fig. 6); ejaculatory apodeme long and widened proximally in lateral view (Fig. 8); aedeagus with ventral projection directed dorsally and placed before folded apex (Figs 8, 9).

Length. Body 13.4 mm; wing 9.0 mm.

Female.

Unknown.

Variations

(n= 5). Body length 12.6-15 mm; wing length 8.3-10 mm; eight to nine black postocular macrosetae; two black, apical scutellar macrosetae; black and yellow katatergal macrosetae; one black supra-alar macrosetae; capitulum reddish; hind femur with two yellow setae on basal 1/2 and two black on apical 1/2 anteroventrally.

Etymology.

From Latin, bi = two + lobus = lobe, referring to the bilobate apex of the epandrium.

Holotype conditions.

Left detached wing mounted on microslides, terminalia placed in microvial with glycerin and pinned along with the specimen.

Distribution.

Brazil: Maranhão (Fig. 50).

Type material examined.

Holotype: BRASIL, MA[ ranhão], Mirador, Parque

Est.[adual] Mirador, Base do Mosquito [06°43'S 44°58'W] / Armadilha de Malaise, 04-08.ii.2011, F. Limeira–de–Oliveira / Holotype Longivena bilobata (♂ INPA).

Paratypes: Same data as holotype / Paratype Longivena bilobata (1♂ INPA; 1♂ CZMA); BRASIL, MA[ ranhão], Mirador, Parque Est.[adual] Mirador, Base da Geraldina / Armadilha Luminosa, 08-13.iii.2008, F. Limeira–de–Oliveira, J.C. Silva / Paratype Longivena bilobat a (1♂ INPA); BRASIL, MA[ ranhão], Mirador, Parque Est.[adual] Mirador, Posto avançado do Mel, 06°43'50"S, 44°58'59"W / Armadilha Luminosa 02-08.iv.2001, F. Limeira–de–Oliveira, G.A. Reis & M.S. Oliveira, cols. / Paratype Longivena bilobata (1♂ CZMA).