Neohybos hirsutus, Ale-Rocha, 2017

Ale-Rocha, Rosaly, 2017, New species of Neohybos Ale-Rocha & Carvalho (Diptera, Hybotidae, Hybotinae) from South America, Zootaxa 4358 (3), pp. 507-531 : 517

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Neohybos hirsutus

sp. nov.

Neohybos hirsutus sp. nov.

( Figs 25–28 View FIGURES 25–28 , 65 View FIGURES 61–66 )

Diagnosis. Body and legs slender; thorax black, entirely pruinescent, scutum with mixed yellowish and greyish pruinescence, pleura covered by sparse gray pruinescence; abdomen about 2.5 times longer than thorax; legs dark brown to black, except apex of tibiae, base of femora and all tarsomeres 1–2 yellow, mid tibia pale brown; wing narrow, smoothly brownish, pterostigma brown; epandrial lamellae short; surstyli complex, both divided into two processes, strongly bristled.

Holotype male. Body: 4.8 mm. Wing: 4.0 mm. Head: postpedicel 2.5 times longer than wide, as long as length of scape and pedicel combined, ovate, pointed distally. Face narrowly dichoptic, as long as frons. Ocellar setae divergent, slender and almost erect. Postcranium clothed in sparse pale brown pruinescence. Postocular setae long, slender and uniserial; occipital setae short and thin, rather numerous and disordered. Thorax ( Fig. 65 View FIGURES 61–66 ): black, entirely pruinescent; scutum with mixed yellowish and greyish pruinescence, pleura covered with sparse gray pruinescence. Setae yellow, sparse, mostly very short and thin; acr and dc uniserial, distinctly longer on prescutellar disc; ial and spal setae sparse; 3 npl longer than apical scutellar pair; 1 pal short; 5 pairs of scutellar setae, apical pair stouter and 3 times longer than lateral setae. Wing: narrow, gently brownish with brown pterostigma; R4+5 and M1 parallel apically. Legs ( Fig. 65 View FIGURES 61–66 ): dark brown to black, except apex of tibiae, base of femora and all tarsomeres 1–2 yellow, and mid tibia pale brown. Hind femur slightly thickened; hind tibia cylindrical slightly arched and enlarged distally. Setae thin, pale brown to yellow. Fore tibia with 1 anterior and 1 posterior short preapical seta not reaching half-length of tarsomere 1. Fore tarsomere 1 with 1 anterior and 1 posterior feebly robust seta. Mid tibia with 2 ad setae before mid-length; 1 long apical posterior seta reaching half-length of tarsomere 1. Mid tarsomere 1 with 1 long pv seta near base, reaching apex of tarsomere; 1 ad seta before middle; 1 ad and 1 pd preapicals, long and stout seta. Hind trochanter setulose, with several yellow setae and 2 stouter, but not spine-like, setae. Hind femur with 1 dorsal seta on distal third; 1 preapical ad seta; 9 spine-like av setae irregularly distributed; ventral surface with 16 spine-like setae shorter than av setae, and 6 pv setae (4 on distal half, 2 near base). Hind tibia with 1 strong preapical pd seta. Hind tarsus without robust setae. Abdomen: brown; about 2.5 times longer than thorax; tergite 1 with brown pruinescence. Setae yellow; tergites with short setae, setae longer and stout laterally of tergites 1–3; sternite 8 with very long and slender setae on distal margin. Terminalia ( Figs 25–28 View FIGURES 25–28 ): epandrial lamella short. Surstyli large, complex, strongly bristled, each divided into two strongly bristled processes; left surstylus as long as respective epandrial lamella; right surstylus twice length of respective epandrial lamella. Right bacilliform sclerite unmodified. Right hypandrial lobe wide basally and tapered distally, inner margin dentate near apex, apex hook-like, folded to right, more than half-length of base of hypandrium. Postgonite slender; phallus robust and slightly arched.

Female. Unknown.

Type material. HOLOTYPE ♂ ( INPA) labelled: “ BRASIL. Amazonas, S. [Santa] Izabel [do] R. [ Rio ] Negro , Pico da Neblina , 8–12.x.1990 / 2,030m, Arm. [Armadilha] Malaise, J.A. Rafael & J. Vidal ”; “ Holótipo / Neohybos hirsutus / Ale-Rocha, R. ” [red label]. Specimen in good condition; dissected.

Distribution. Brazil (Amazonas).

Etymology. The specific name is derived from Latin hirsutus (hairy, bristly) and refers to the abundant setae on the surstylus.


Instituto Nacional de Pesquisas da Amazonia