Neohybos lautus, 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 : 520-521

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Neohybos lautus

sp. nov.

Neohybos lautus sp. nov.

( Figs 33–38 View FIGURES 33–38 , 58 View FIGURES 55–60 , 67 View FIGURES 67–70. 67 )

Diagnosis. Postpedicel elongate, 3.3 times longer than wide; thorax black, shiny dorsally and on a small area on anepisternum and katepisternum lacking pruinescence; prescutellar disc, notopleuron and pleura clothed in gray pruinescence; wing brown basally, hyaline distally and on pterostigma; legs dark brown, except tarsomeres 1–2 pale brown to yellow; hind femur somewhat slender; abdomen elongate, more than 4 times longer than thorax.

Holotype male. Body: 5.3 mm. Wing: 3.2 mm. Head: postpedicel 3.3 times longer than wide, as long as length of scape and pedicel combined. Face very narrow, linear, about as long as frons. Ocellar setae long, rather robust and parallel. Postcranium clothed in gray pruinescence. Postocular setae sparse and as long as ocular setae; occipital setae long, sparse and uniserial. Thorax ( Fig. 67 View FIGURES 67–70. 67 ): black; shiny dorsally and on small area on anepisternum and katepisternum lacking pruinescence; prescutellar disc, notopleuron and pleura clothed in gray pruinescence. Setae brown, sparse, mostly short; acr and dc uniserial, setae of prescutellar disc approximately 1.5 times longer than anterior setae; notopleuron sparsely setose with 2 long npl; 1 very long pal; 4 pairs of scutellar setae, apical pair somewhat stouter and twice length of lateral setae. Wing ( Fig. 58 View FIGURES 55–60 ): somewhat short and narrow, basal 1/3 slightly brownish and remaining hyaline, pterostigma hyaline; anal lobe weakly developed; R4+5 and M1 parallel apically. Legs ( Fig. 67 View FIGURES 67–70. 67 ): brown to dark brown, except tarsomeres 1–2 pale brown to yellow. Hind femur only slightly thickened; hind tibia cylindrical and straight. Setae brown. Fore tibia with 1 elongate apical posterior seta reaching half-length of fore tarsomere 1, and 1 short apical anterior seta. Mid tibia with 3 ad setae (1 near base, 1 on basal third, 1 on distal third); 2 stout av setae (1 median, 1 on distal third); 1 short distal posterior seta and 1 ventroapical seta as long as fore tarsomere 1. Fore and mid tarsomere 1 with 1 long distal seta on anterior and posterior surfaces reaching apex of tarsomere 2. Fore and mid tarsomere 2 with 1 long and robust seta on anterior and other on posterior surfaces. Hind trochanter with 2 spine-like setae. Hind femur with 1 preapical ad and 1 preapical anterior setae; 10 spine-like av setae; ventral surface with row of 15 spine-like setae gradually shortened on distal fifth of femur; pv row with 9 setae (7 on distal half, 2 near base). Hind tibia with 2 ad setae (1 on basal third, 1 on distal third), and 1 stout preapical seta on pd surface. Hind tarsomere 1 with some spine-like av setae. Abdomen: shiny black with pale brown setae; elongate, about 4.3 times longer than thorax; tergites 1 and 8 covered with sparse gray pruinescence; setae longer laterally on tergites, mainly on tergites 1–3; sternite 8 with long setae on distal margin. Terminalia ( Figs 33–38 View FIGURES 33–38 ): hypopygium somewhat short. Epandrium wider than long. Right bacilliform sclerite unmodified. Right and left surstylus folded inward. Right hypandrial lobe wide, triangular, occupying most part of posterior margin of hypandrium, approximately halflength of base of hypandrium. Postgonites ribbon-like, slightly broadened medially; phallus robust, slightly arched, strongly narrowed below middle, with rounded apex.

Female. Similar to male, except hind trochanter without ventral spine-like setae and hind femur with 7 spinelike AV setae. Terminalia ( Figs 37, 38 View FIGURES 33–38 ): segment 8 slender, more than twice longer than wide; tergite and sternite 8 completely sclerotized.

Type material. HOLOTYPE ♂ ( INPA) labelled: “ BRASIL . [Amazonas], MA [ Manaus ] / Puraquequara / 27.ii. [19]95 / Varredura / J. Vidal ”; “ Holótipo / Neohybos lautus / Ale-Rocha, R. ” [red label]. Condition of specimen: left wing mounted between slides, left mid tarsomere 2–5 lost, distal half of abdomen glued on a paper triangle and pinned together with specimen. PARATYPES. BRASIL. [Amazonas]: MA [Manaus], Puraquequara, 27.ii. [19]95, varredura, J. Vidal (1♀, INPA); Manaus, AM 0 10, Km 54, BI 2, 02°45ʹ33ʺS - 59°51ʹ0.03ʺW, 19– 28.viii.1997, Suspensa / Clareira #1, R.L.M. Ferreira, AL Henriques & J.F. Vidal (1♂, INPA); Presidente Figueiredo, Cachoeira Santuário, 1–7.ix.2001, Ale-Rocha (1♂, INPA) . Amapá: Porto Platon , 22.ix.1957, J. Lane (1♂, MZUSP).

Distribution. Brazil (Amazonas, Amapá).

Etymology. The specific name is Latin for washed, brilliant, and refers to the shiny scutum of this species.


Instituto Nacional de Pesquisas da Amazonia


Museu de Zoologia da Universidade de Sao Paulo