Neohybos elongatus, 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 : 515-517

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Neohybos elongatus

sp. nov.

Neohybos elongatus sp. nov.

( Figs 20–24 View FIGURES20–24 , 64 View FIGURES 61–66 )

Diagnosis. Face holoptic; body and legs slender; thorax clothed in coarse reddish brown pruinescence, with a dorsocentral shiny stripe and a shiny round spot laterally on post-sutural region; 1 posterior dc pair long and strong; abdomen very long, about 6 times longer than thorax; fore and mid legs yellow, except coxae, trochanters and fore and mid tarsomeres 3–5 brown; hind leg with coxa, trochanter, femur and tarsomeres 3–5 brown to black, tibia yellow, slightly darker in the middle, and hind tarsomeres 1–2 yellow; wing hyaline, pterostigma hyaline.

Holotype male. Body: 6.0 mm. Wing: 3.6. mm. Head: postpedicel twice longer than wide, slightly longer than length of scape and pedicel combined, pointed distally. Face holoptic, half length of frons. Ocellar setae long, divergent and almost erect. Postcranium clothed in sparse pale brown pruinescence. Postocular setae elongate; occipital setae somewhat elongate, thin, sparse and uniserial. Thorax ( Fig. 64 View FIGURES 61–66 ): black, clothed in dense reddish brown pruinescence, with shiny narrow stripe on dorsocentral line and shiny rounded spot laterally on post-sutural region. Setae brown, mostly short; acr 4-serial anteriorly, misaligned; dc uniserial, 1 posterior dc long and strong; ial and spal setae sparse; 2 npl long and strong; 1 pal thin; scutellum with 2 very thin and short lateral setae (apical scutellar pair lost). Wing: narrow; hyaline, pterostigma hyaline; R4+5 and M1 slightly convergent apically. Legs ( Fig. 64 View FIGURES 61–66 ): fore and mid legs yellow, except coxae, trochanters and tarsomeres 3–5 brown; hind leg with coxa, trochanter, femur and hind tarsomeres 3–5 brown to black, tibia yellow, darkened in middle and hind tarsomeres 1–2 yellow. Hind femur slightly thickened; hind tibia straight, cylindrical. Setae slender, sparse and yellow. Fore tibia with 1 anterior and 1 posterior long preapical seta reaching apex of fore tarsomere 1. Fore tarsomere 1 with 1 anterior and 1 posterior long and robust preapical seta, extending beyond apex of fore tarsomere 2. Mid tibia with 2 long and robust ad setae on basal third; 1 long ventroapical seta reaching half-length of mid tarsomere 2. Mid tarsomere 1 with 1 dorsal seta near base and 1 elongate preapical dorsal seta; 1 long pv seta reaching half-length of mid tarsomere 2; 1 elongate and robust preapical posterior seta extending beyond apex of mid tarsomere 2. Hind trochanter setulose with 1 short ventral spine-like seta. Hind femur with 1 dorsal and 1 anterior robust seta on distal fifth; 1 short preapical ad; row of 8 elongate spine-like av setae not aligned (third and fifth setae positioned on ventral surface) and widely separated; ventral surface with 14 short spine-like setae closely approximated near apex of femur; 12 rather shortened spine-like pv setae. Hind tibia and hind tarsus without robust setae. Abdomen: shiny brown; very long, about 6 times longer than thorax; tergites 5–8 and all sternites covered with pale sparse pruinescence. Setae pale brown, very sparse, thin, longer on tergite 1 and lateral of all tergites; sternite 8 with numerous long setae on distal margin. Terminalia ( Figs 20–24 View FIGURES20–24 ): hypopygium long and narrow. Right bacilliform sclerite with long, straight, robust, apically pointed dorsal process. Left epandrial lamella with long, slender preapical process on inner margin. Right surstylus folded inward and sinuous; left surstylus truncate apically. Right hypandrial lobe wide, pointed apically, about two-thirds length of base of hypandrium. Postgonite bilobed; phallus robust, slightly narrowed at middle, with rounded apex.

Female. Unknown.

Type material. HOLOTYPE ♂ ( INPA) labelled: “ BRASIL, Acre, Parque Nacional Serra do Divisor , Morro Queimado, 09°24ʹS 73°12ʹW - 07°32ʹS-73°54ʹW, Malaise, #2, E. F. Morato, 10–11.xi.1996 ”; “Holótipo / Neohybos elongatus / Ale-Rocha, R. ” [red label]. Specimen in good condition except for mid tarsomeres 3–5 lost; abdomen dissected; right wing mounted between slides.

Distribution. Brazil (Acre).

Etymology. The specific name is derived from the Latin longus (long) in reference to length of the body.


Instituto Nacional de Pesquisas da Amazonia