Neohybos annulatus, 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 : 512-513

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Neohybos annulatus

sp. nov.

Neohybos annulatus sp. nov.

( Figs 10–15 View FIGURES10–15 , 63 View FIGURES 61–66 )

Diagnosis. Median ocellus large; scutum shiny dorsally, dark brown except for postalar callus yellow and yellow spot on postpronotal lobe; legs yellow with fore and mid tarsomeres 3–5 pale brown, hind tarsomeres 4–5 brown, and hind femur with wide brown ring beyond middle; abdomen about 3.6 times longer than thorax; wing hyaline.

Holotype male. Body: 4.6mm. Wing: 3.2mm. Head: postpedicel narrow, 1.5 times longer than wide, as long as length of scape and pedicel combined. Face narrowly dichoptic, shorter than frons. Median ocellus large; ocellar setae lost (very thin in female and variable in paratypes). Postcranium clothed in sparse pale brown pruinescence. Postocular setae somewhat elongate, thin and sparse; occipital setae uniserial, disordered below. Thorax ( Fig. 63 View FIGURES 61–66 ): scutum shiny dorsally; lateral of scutum, prescutellar disc and pleura clothed in sparse brown pruinescence; scutum dark brown except postalar callus yellow and for yellow spot on postpronotal lobe; pleura brown. Setae pale brown to yellow, sparse, mostly short and thin; acr and dc uniserial, slightly longer on prescutellar disc; ial and spal setae sparse, uniserial; 2 npl as long as apical scutellar pair; 1 pal long; 5 pairs of scutellar setae, apical pair parallel, curved upward, and twice longer than further lateral setae. Wing: slightly broadened, hyaline, pterostigma hyaline; R4+5 and M1 parallel apically. Legs ( Fig. 63 View FIGURES 61–66 ): yellow except fore and mid tarsomeres 3–5 pale brown, hind tarsomeres 4–5 brown and hind femur with wide brown ring on apical third. Hind femur thickened; hind tibia straight, cylindrical. Setae yellow. Fore tibia with 1 anterior and 1 posterior short preapical seta reaching apex of fore tarsomere 1. Fore and mid tarsomeres with long dorsoapical setae. Mid tibia with 1 long sub-basal anterior seta; 1 very long ventroapical seta extending beyond apex of mid first tarsomere. Mid tarsomere 1 with 1 long sub-basal pv seta reaching half-length of mid tarsomere 2. Hind trochanter densely setulose, with some spine-like setae. Hind femur with 7 elongate spine-like av setae; 1 ad seta on distal fifth; 1 ad seta near apex, 1 anterior seta on distal fifth; 12 spine-like ventral setae shortening gradually toward apex of femur; 8 robust pv setae shortening gradually toward base of femur. Hind tibia lacking differentiated setae. Abdomen: black, shiny, about 3.6 times longer than thorax; tergites and sternites 7–8 clothed in very fine and sparse brown pruinescence. Setae yellow, very short dorsally; some elongate setae on distal margin of sternite 8. Terminalia ( Figs 10–13 View FIGURES10–15 ): right bacilliform sclerite unmodified, lacking process. Right surstylus bilobed, dorsal lobe short and truncate and ventral lobe long, slender and arched; left surstylus complex with five slender processes. Posterior margin of hypandrium with median lobe bent apically to left side and sharpened towards apex, about half-length of base of hypandrium, bearing long and strong setae. Postgonite distinctly bilobed; phallus robust, tapered to rounded apex.

Female. Similar to male, except for: hind femur slightly slender, ad setae absent, 5 av setae longer than in male, 11 spine-like ventral setae, 1 short preapical seta on posterior surface, pv rows complete and numerous with slender setae, only 3 apical setae thickened. Terminalia ( Figs 14–15 View FIGURES10–15 ): segment 8 about 1.7 times longer than wide; tergite and sternite 8 partially sclerotized.

Type material. HOLOTYPE ♂ ( INPA) labelled: “ BRASIL. Amazonas: Manaus, Rod.[Rodovia] AM / 0 10, km 50, ZF 2, km 14, Torre / 02°35ʹ29ʺS, 60°06ʹ55ʺWʺ; “ 4.iii.2004, 03–06:00 Arm. [Armadilha] Luz / Dossel, 40m de altura, F.F. Xavier / Filho, J.T. Câmara, P. Dias leg.”; “ Holótipo / Neohybos annulatus / Ale-Rocha, R. ” [red label]. Specimen in good condition not dissected . PARATYPES. BRASIL. Acre: Cruzeiro do Sul, Rio Moa, 07°37ʹ02ʺS -72°46ʹ15ʺW, 19–28.xi.1996, Varredura mata, J.A. Rafael, J. Vidal & R.L. Menezes (1♂). Amazonas: Manaus , PDBFF / WWF, Proj. [ Projeto ] Bert Klein , Malaise , iii.1986, Res. [ Reserva ] 1210 (2♀); ii.1987, Res. 1208 (1♀); xii.1986, Res. 1112 (1♀); iv.1987, Reserva 1208 (1♂); Res. [ Reserva ] Km 41, 10–12.xi.2004, Trilha JI, D. [ Dossel ], R. Querino (1♀); Manaus , Reserva Ducke, AM 0 10, km 24, Armadilha Suspensa lâmina d’água, 24– 29.x. [19]96, A.L. Henriques, J. Vidal (1♂); Manaus , Rod.[ Rodovia ] AM 0 10, km 50, ZF 2, km 14, Torre , 02°35ʹ29ʺS, 60°06ʹ55ʺW, 4.iii.2004, 03–06:00, Arm. [ Armadilha ] Luz Dossel, 40m de altura, F.F. Xavier Filho, J.T. Câmara, P. Dias leg. (1♂) (all deposited in INPA).

Distribution. Brazil (Acre, Amazonas).

Etymology. The specific name is derived from the Latin annulus (ring) in reference to the brown ring on the hind femur.

Remarks. Specimens were originally preserved in alcohol, therefore coloration can be slightly paler than in fresh specimens. The specimen from the state of Acre ( Brazil) has a brown pterostigma.

The male terminalia of N. anullatus sp. nov. resembles the terminalia of N. ramosus sp. nov. in some aspects such as the apex of median hypandrial lobe, bent to the left side, and the shape of the surstylus. However, N.

anullatus sp. nov. can be distinguished from the latter species by the coloration of the legs predominantly yellow, pterostigma hyaline or brownish, abdomen shorter, about 3.6 times longer than thorax, scutum almost bare, with sparse setae, acr uniserial, scutum with pruinescence only on distal half of prescutellar disc, a triangular yellow spot on the anepimeron, lacking posterior dc developed pair and postpedicel long and slender. In N. ramosus sp. nov. the legs are predominantly brown, pterostigma hyaline, abdomen distinctly longer, 4.5 times longer than thorax, scutum setose, acr with 4 series anteriorly, anterior margin of scutum and prescutellar disc pruinescent, pleura wholly brown, 1 posterior dc pair developed, and postpedicel short and ovate.


Instituto Nacional de Pesquisas da Amazonia


Rob and Bessie Welder Wildlife Foundation