Neohybos neblinensis, 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 : 522-524

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Neohybos neblinensis

sp. nov.

Neohybos neblinensis sp. nov.

( Figs 39–44 View FIGURES 39–44 , 59 View FIGURES 55–60 , 68 View FIGURES 67–70. 67 )

Diagnosis. Thorax entirely pruinescent, brown pruinescence on anterior two-thirds of scutum, gray pruinescence on remainder and scutellum, and whitish gray on pleura; wing gently brownish, stigma brown; legs longer than usual, pale brown except basal two-thirds of hind tibia and all tarsomeres 1–2 yellow; abdomen and legs clothed in yellow setae; right bacilliform sclerite with long and hook-like dorsal process bearing a finger-like projection near base; hypandrium with a medial lobe long and slender, slightly curved, tapered distally.

Holotype male. Body: 5.1mm. Wing: 4.8mm. Head: postpedicel 2.2 times longer than wide, slightly longer than length of scape and pedicel combined. Face dichoptic, shorter than frons. Ocellar setae long, slender and divergent. Postcranium clothed in dense brown pruinescence. Postocular setae very long, slender, similar to ocellar setae; occipital setae long and sparse, uniserial. Thorax ( Fig. 68 View FIGURES 67–70. 67 ): brown; entirely covered by pruinescence, with brown pruinescence on anterior two-thirds of scutum, gray on posterior third and on scutellum, and whitish gray on pleura. Setae brown and sparse, mostly short and thin; dc and acr uniserial, dc setae slightly longer on prescutellar disc; ial and spal setae sparse; 2 long npl, longer than apical scutellar pair; 1 short pal; 4 pairs of scutellar setae, apical pair stout, slightly divergent and twice length of lateral setae. Wing ( Fig. 59 View FIGURES 55–60 ): narrow, gently brownish, pterostigma brown; R4+5 and M1 parallel apically. Legs ( Fig. 68 View FIGURES 67–70. 67 ): longer than usual; pale brown except basal two-thirds of hind tibia and all tarsomeres 1–2 yellow. Hind femur thickened; hind tibia straight and cylindrical. Setae yellow. Fore tibia with 1 anterior and 1 posterior short preapical seta, not reaching half-length of fore tarsomere 1. Mid tibia with 3 long ad setae on basal third and 1 ventroapical seta reaching apex of mid tarsomere 1. Fore and mid tarsomeres 1 with 1 long pv seta near base extended beyond apex of tarsomere. Hind femur with 11 spine-like av setae; 1 robust dorsal seta on distal fifth; 1 preapical ad seta; 1 anterior seta on distal third; 15 spine-like ventral setae, 8 distalmost setae very short; 5 spine-like pv setae on distal third; 3 pv setae on basal fourth as long and strong as av setae. Hind tibia with 4–5 elongate, thin dorsal setae. Hind tarsomere 1 with 1–3 av spine-like setae. Hind trochanter without spine-like setae. Abdomen: sub-shiny, brown; about 3 times longer than thorax; tergite 1 and base of tergites 6–8 covered with brown pruinescence. Setae shorter dorsally, yellow; sternite 8 with long setae on distal margin. Terminalia ( Figs 39–44 View FIGURES 39–44 ): right bacilliform sclerite with long hook-like dorsoapical process bearing one conical tubercle on inner side. Right surstylus with three elongate pointed branches; left surstylus long, robust, tapered to narrow apex. Base of hypandrium long; posterior margin of hypandrium with long, slender medial finger-like lobe, about half length of base of hypandrium. Postgonites ribbon-like and slender; phallus long, robust, slightly arched, with broad truncate apex.

Female. Similar to male except hind femur slender, with slender and longer setae and reduced in number, bearing 7 av and 11 ventral short thorn-like setae on distal half. Terminalia ( Figs 43, 44 View FIGURES 39–44 ): segment 8 about 2 times longer than wide; tergite 8 weakly sclerotized on distal half, with two oval sclerotized areas on basal half; sternite 8 membranous.

Type material. HOLOTYPE ♂ ( INPA) labelled: “ BRASIL. Amazonas / S.[Santa] Izabel do Rio Negro / Pico da Neblina / 12.x.1990 ; 2030 m. / Arm. [Armadilha] Malaise / J.A. Rafael / J. Vidal ”; “ Holótipo / Neohybos neblinensis / Ale-Rocha, R. ” [red label]. Specimen in good condition; not dissected. PARATYPES. BRASIL. Amazonas, S.[Santa] Izabel do Rio Negro, Pico da Neblina , 8–13.x.1990 (2♂, 5♀, INPA) .

Additional material. One specimen lacking abdomen; same data of holotype. Distribution. Brazil (Amazonas).

Etymology. The specific name refers to the site where the specimens were collected, Pico da Neblina, Brazil. Variation. General coloration varies from pale-brown to dark-brown.


Instituto Nacional de Pesquisas da Amazonia