Neohybos ramosus, 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 : 525-527

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Neohybos ramosus

sp. nov.

Neohybos ramosus sp. nov.

( Figs 49–54 View FIGURES 49–54 , 60 View FIGURES 55–60 , 70 View FIGURES 67–70. 67 )

Diagnosis. Thorax black, shiny dorsally; along anterior margin of scutum, notopleuron, prescutellar disc, margin of scutellum and pleura clothed in dense, pale brown pruinescence; scutum setulose, acr 4-serial anteriorly, misaligned, biserial on prescutellar disc; postpedicel short and ovate; 1 posterior dc pair developed; legs dark brown with all tarsomeres 1–2, fore and mid tibiae, distal ¼ of fore and mid-femur and base of hind tibia yellow; wing hyaline, pterostigma hyaline; abdomen long and slender, 4.5 times longer than thorax.

Holotype male. Body: 4.5 mm. Wing: 3.1 mm. Head: postpedicel 2 times longer than wide, ovate, tapered distally, as long as length of scape and pedicel combined. Face narrowly dichoptic, half length of frons. Ocellar setae short and strong, slightly divergent. Postcranium clothed in dense, pale brown pruinescence. Postocular setae somewhat elongate; occipital setae yellow, thin and uniserial. Thorax ( Fig. 70 View FIGURES 67–70. 67 ): black; shiny dorsally; along anterior margin of scutum, notopleuron, prescutellar disc, margin of scutellum and pleura clothed in dense, pale brown pruinescence. Setae mostly yellow, thin, sparse and rather elongate; acr 4-serial anteriorly, misaligned, biserial on prescutellar disc; dc uniserial, both longer on prescutellar disc; 1 posterior dc pair long, robust, black; ial and spal setae somewhat numerous and disordered; 2 npl long, as long as apical scutellar pair; pal lost; 3 pairs of scutellar setae, apical pair divergent, closely approximated, long, stout, and 3 times longer than lateral setae, latter setae very thin.

Wing ( Fig. 60 View FIGURES 55–60 ): narrow, hyaline, pterostigma hyaline; R4+5 and M1 slightly convergent apically. Legs ( Fig. 70 View FIGURES 67–70. 67 ): Coxae, trochanters, hind femur and all tarsomeres 3–5 dark brown; fore and mid femora brown, except distal fourth yellow; fore and mid tibiae and all tarsomeres 1–2 yellow; hind tibia brown with yellow base. Hind femur thickened, hind tibia straight, cylindrical. Setae sparse, mostly pale brown, yellow on tarsomeres. Fore tibia with 1 long preapical anterior and posterior seta extended beyond mid-length of fore tarsomere 1. Fore tarsomere 1 with 1 anterior and 1 posterior long preapical seta reaching apex of tarsomere 2. Mid tibia with 2 long and strong ad setae before middle and 1 posterior apical seta reaching half-length of mid tarsomere 2. Mid tarsomere 1 with 1 long preapical ad and 1 very long ventral seta near base, extended beyond mid-length of mid tarsomere 2. Hind trochanter with 1 short anterior spine-like and several spine-like setae on posterior surface. Hind femur with 1 dorsal seta on distal fourth, 1 anterior preapical, 6 developed spine-like av setae and 13 short ventral spines arising from protuberances. Hind tibia and hind tarsus lacking strong setae. Abdomen: shiny black; long and slender, about 4.5 times longer than thorax; tergite 8 and all sternites covered with brown pruinescence. Setae yellow; very thin, short and inconspicuous dorsally; longer on tergite 1, laterally on tergites 2–3 and all sternites, remarkably longer on distal margin of sternite 8. Terminalia ( Figs 49–52 View FIGURES 49–54 ): right bacilliform sclerite with elongate, slightly robust and apically round process with outer margin dentate near apex. Right surstylus with bilobed apex, ventral lobe slender than dorsal and with apex tapered and slightly arched; left surstylus with three branches, medial branch bearing conspicuous setae. Hypandrium long basally; posterior margin bearing median short, robust lobe, with truncate apex, bearing finger-like apical process on left side, and long and strong setae. Postgonite distinctly bilobed; phallus slender with posterior end truncate, arched medially.

Female. Similar to male, except hind femur slightly slender with longer and slender av setae, and hind trochanter without spine-like setae. Terminalia ( Figs 53–54 View FIGURES 49–54 ): segment 8 1.5 times longer than wide; tergite 8 homogeneously sclerotized, extended ventrally around base of sternite 8; sternite 8 sclerotized, with small medial indentation basally.

Type material. HOLOTYPE ♂ ( INPA) labelled: “ BRASIL, Amazonas / Manaus, Res [erva] Ducke / x.2003 / N.S. 2, 200mts; Arm [adilha] Suspensa 20 mts / A. Henriques et al. Leg. ”; “ Holótipo / Neohybos ramosus / Ale- Rocha, R. ” [red label]. Specimen in good condition except by left mid leg lost; not dissected . PARATYPES. BRASIL, Amazonas, Manaus, AM 0 10, Km 54, BI 2, 02°45ʹ33ʺS-59°51ʹ03ʺW, 3–12.iii.1997, J. Vidal, Suspensa mata 15 mts (1♂); Res [erva] Km 41, PDBFF , 24–25.xi.2004, Trilha RR B-D, R. Querino (1♂); Reserva Ducke, Igarapé Barro Branco, Armadilha Malaise, 08–18.xi.2004, Henriques, A. leg. (1♂, 1♀) ; 06–16.vii.2004 (1♂) (all deposited in INPA).

Distribution. Brazil (Amazonas).

Etymology. The specific name is derived from the Latin ramus (branch) in reference to the shape of the left surstylus.

Remarks. Structures of the male terminalia of this species are very similar to those of Neohybos anullatus sp. nov. and discussed in the “Remarks” section of the latter.


Instituto Nacional de Pesquisas da Amazonia